In addition to known extrasolar planets, there are many planet candidates whose existence is more or less uncertain, or they are now known not to exist. On February 2, 2011, the Kepler Space Observatory Mission team released a list of 1235 (unconfirmed) extrasolar planet candidates. 68 candidates are "Earth-size" (smaller than 1.25 of the radius of Earth); 54 candidates are thought to be in the "Habitiable Zone (HZ)

Habitable zone

In astronomy and astrobiology, a habitable zone is an umbrella term for regions that are considered favourable to life. The concept is inferred from the empirical study of conditions favourable for Life on Earth...

;" Six candidates (KOI 326.01, KOI 701.03, KOI 268.01, KOI 1026.01, KOI 854.01, KOI 70.03 - Table 6) in the HZ

Habitable zone

In astronomy and astrobiology, a habitable zone is an umbrella term for regions that are considered favourable to life. The concept is inferred from the empirical study of conditions favourable for Life on Earth...

 are less than twice the size of the Earth; one candidate in the HZ

Habitable zone

In astronomy and astrobiology, a habitable zone is an umbrella term for regions that are considered favourable to life. The concept is inferred from the empirical study of conditions favourable for Life on Earth...

 is "Earth-size" (namely, KOI 326.01 at 0.85 the radius of Earth). Nonetheless, there are 53 unconfirmed extrasolar planets listed here.

Planet candidates with incomplete or poorly-constrained orbits

The following planet candidates have been detected indirectly (e.g. by the radial velocity method) but have not yet had sufficient observations to constrain their orbital properties, either because the planet has not yet completed a full orbit during the time of observation, or because the measurements are too sparse. The parameters given in this table are thus preliminary: further observations of these systems may result in significant changes.

Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Distance (ly)	Planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...	Mass Mass Mass can be defined as a quantitive measure of the resistance an object has to change in its velocity.In physics, mass commonly refers to any of the following three properties of matter, which have been shown experimentally to be equivalent:... (MJ Jupiter mass Jupiter mass , is the unit of mass equal to the total mass of the planet Jupiter . Jupiter mass is used to describe masses of the gas giants, such as the outer planets and extrasolar planets. It is also used in describing brown dwarfs.... )	Orbital period Orbital period The orbital period is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.There are several kinds of... (d Day A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun... )	Semimajor axis (AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance.... )	Orbital eccentricity Orbital eccentricity The orbital eccentricity of an astronomical body is the amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit...	Discovery year	Ref	Notes
HD 1461 HD 1461 HD 1461 is a G0V class star slightly more massive than the Sun , located about 76 light-years away in the constellation of Cetus.As of December 2009, HD 1461 is now the largest main sequence star with a possible Super-Earth around it....	Cetus Cetus Cetus is a constellation. Its name refers to Cetus, a sea monster in Greek mythology, although it is often called 'the whale' today. Cetus is located in the region of the sky that contains other water-related constellations such as Aquarius, Pisces, and Eridanus.-Ecliptic:Although Cetus is not...			76	c HD 1461 c HD 1461 c is a possible extrasolar planet, orbiting the 6th magnitude G-type star HD 1461, 76 light years away in the constellation Cetus. This planet has a minimum mass between 13.1 to 32.7 times that of Earth and orbits at a distance of 1.165 AU with an eccentricity of 0.74. This planet is most...	≥0.072	454	1.165	0.74	2009		The present day (2009) radial velocity method is hard to find Neptune-mass planets at more than 1 AU away from the stars.
HD 1461 HD 1461 HD 1461 is a G0V class star slightly more massive than the Sun , located about 76 light-years away in the constellation of Cetus.As of December 2009, HD 1461 is now the largest main sequence star with a possible Super-Earth around it....	Cetus Cetus Cetus is a constellation. Its name refers to Cetus, a sea monster in Greek mythology, although it is often called 'the whale' today. Cetus is located in the region of the sky that contains other water-related constellations such as Aquarius, Pisces, and Eridanus.-Ecliptic:Although Cetus is not...			76	d HD 1461 d HD 1461 d is a possible extrasolar planet, orbiting the 6th magnitude G-type star HD 1461, 76 light years away in the constellation Cetus. The parameters for this planet are poorly constrained, including mass, semimajor axis, and orbital period. The determined minimum mass of this planet is about...	≥0.3	5000	5	0.16	2009		All parameters for this planet are very poorly constrained.
GD 66 GD 66 GD 66 or V361 Aurigae is a 0.64 solar mass pulsating white dwarf star located 170 light years from Earth in the Auriga constellation. The estimated cooling age of the white dwarf is 500 million years...	Auriga Auriga (constellation) Auriga is a constellation in the northern sky. Its name is Latin for 'charioteer' and its stars form a shape that has been associated with the pointed helmet of a charioteer. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and remains among the 88 modern...			170	b GD 66 b GD 66 b is an unconfirmed extrasolar planet orbiting the DAV type pulsating white dwarf GD 66. Small variations in the phase of pulsation suggest that the star is moving in a small circle due to the gravitational pull of a smaller unseen body. This method is similar to that used to discover pulsar...	≥2.36	2080	2.75	~0	2009		Partial orbit coverage
Gliese 317 Gliese 317 Gliese 317 is a red dwarf star approximately 50 light-years away in the constellation of Pyxis. The star has an apparent magnitude of 12, an absolute magnitude of 12.2, and corresponding to visual luminosity of 0.1% Sun...	Pyxis Pyxis Pyxis is a small and faint constellation in the southern sky. Its name is Latin for a mariner's compass...			29.9	c Gliese 317 c Gliese 317 c is a possible extrasolar planet approximately 50 light-years away in the constellation of Pyxis. The planet was announced in July 2007 to be orbiting the red dwarf star Gliese 317. The planet is a Jovian planet that is, at least, 83% the mass of Jupiter. The semi-major axis is...	≥0.83	~2700		0.42	2007		2-planet solution modifies parameters of (confirmed) planet b.

Candidate transiting planets

There are several known stars for which potential planetary transits have been observed, however they lack enough follow-up information (such as radial velocity

Radial velocity

Radial velocity is the velocity of an object in the direction of the line of sight . In astronomy, radial velocity most commonly refers to the spectroscopic radial velocity...

 measurements) to rule out other hypotheses, such as the presence of a background eclipsing binary star, or a grazing transit of a larger object.

Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Distance (ly)	Planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...	Radius Radius In classical geometry, a radius of a circle or sphere is any line segment from its center to its perimeter. By extension, the radius of a circle or sphere is the length of any such segment, which is half the diameter. If the object does not have an obvious center, the term may refer to its... (RJ)	Orbital period Orbital period The orbital period is the time taken for a given object to make one complete orbit about another object.When mentioned without further qualification in astronomy this refers to the sidereal period of an astronomical object, which is calculated with respect to the stars.There are several kinds of... (d Day A day is a unit of time, commonly defined as an interval equal to 24 hours. It also can mean that portion of the full day during which a location is illuminated by the light of the sun... )	Discovery year	Ref	Notes
1SWASP-J115718.66+261906.1	Leo Leo (constellation) Leo is one of the constellations of the zodiac. Its name is Latin for lion. Its symbol is . Leo lies between dim Cancer to the west and Virgo to the east.-Stars:...				b	1.32	1.226804	2007
1SWASP-J130322.00+350525.4	Canes Venatici Canes Venatici Canes Venatici is one of the 88 official modern constellations. It is a small northern constellation that was created by Johannes Hevelius in the 17th century. Its name is Latin for "hunting dogs", and the constellation is often depicted in illustrations as representing the dogs of Boötes the...				b	1.06	2.674207	2007		Transit shape suggests this may be a grazing eclipsing binary.
1SWASP-J152131.01+213521.3	Serpens Caput				b	1.62	1.338018	2007
1SWASP-J160242.43+290850.1	Corona Borealis Corona Borealis Corona Borealis is a small constellation in the northern sky. Its name is Latin for "northern crown", a name inspired by its shape; its main stars form a semicircular arc. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy and remains one of the 88 modern...				b	1.53	1.304693	2007		Transit shape suggests this may be a grazing eclipsing binary.
SWEEPS J175853.29−291233.5	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-01	1.01	1.566	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175853.38–291217.8	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-02	1.37	0.912	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175853.57–291144.1	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-03	0.87	1.279	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175854.60–291128.2	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-05	1.09	2.313	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175857.29–291253.4	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-06	0.82	3.039	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175857.69–291114.5	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-07	0.90	1.747	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175859.24–291328.7	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-08	0.98	0.868	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175859.60–291211.8	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-09	1.01	1.617	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175902.00–291323.7	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-10 SWEEPS-10 |- style="vertical-align: top;"SWEEPS-10 is, as of June 2007, the planet candidate with the shortest orbital period yet found. The planet orbits the star SWEEPS J175902.00−291323.7 located in the Galactic bulge at a distance of approximately 22000 light years from Earth...	1.24	0.424	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175904.44–291317.1	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-12	0.91	2.952	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175905.95–291305.6	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-13	0.78	1.684	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175907.56–291039.8	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-14	0.93	2.965	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175907.64–291023.7	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-15	1.37	0.541	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
SWEEPS J175908.44–291140.6	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~22000	SWEEPS-16	1.40	0.969	2006		Distance modulus Distance modulus -Definition:The distance modulus \mu=m-M is the difference between the apparent magnitude m and the absolute magnitude M of an astronomical object...  = 14.1
CoRoT-102636650	Monoceros			-	CoRoT-102636650 b	-	8.1	2007
CoRoT-102638570	Monoceros			-	CoRoT-102638570 b	-	6.5	2007
OGLE-TR-123 OGLE-TR-123 |-! style="background-color: #FFFFC0;" colspan="2" | Characteristics|-| Spectral type  | F /M |- style="vertical-align: top;"| Apparent magnitude  '| 15.40 |- style="vertical-align: top;"...	Carina Carina (constellation) Carina is a constellation in the southern sky. Its name is Latin for the keel of a ship, and it was formerly part of the larger constellation of Argo Navis until that constellation was divided in three.-Stars:...			500 pc Parsec The parsec is a unit of length used in astronomy. It is about 3.26 light-years, or just under 31 trillion kilometres ....	OGLE-TR-123 b	0.41	1.803	2010		Needs RV measurement
OGLE-TR-173	Musca			100 pc	OGLE-TR-173 b	0.43	2.605	2010		Needs RV
OGLE-TR-61	Carina Carina (constellation) Carina is a constellation in the southern sky. Its name is Latin for the keel of a ship, and it was formerly part of the larger constellation of Argo Navis until that constellation was divided in three.-Stars:...			250 pc	OGLE-TR-61 b	0.6	4.268	2010		Needs RV
OGLE-TR-74	Carina Carina (constellation) Carina is a constellation in the southern sky. Its name is Latin for the keel of a ship, and it was formerly part of the larger constellation of Argo Navis until that constellation was divided in three.-Stars:...			250 pc	OGLE-TR-74 b	0.63	1.581	2010		Needs RV

Planets suspected from dust disk morphology

The following planets have been predicted based on the morphology of dust disks around their stars.

Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Distance (ly)	Planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...	Mass Mass Mass can be defined as a quantitive measure of the resistance an object has to change in its velocity.In physics, mass commonly refers to any of the following three properties of matter, which have been shown experimentally to be equivalent:... (MJ Jupiter mass Jupiter mass , is the unit of mass equal to the total mass of the planet Jupiter . Jupiter mass is used to describe masses of the gas giants, such as the outer planets and extrasolar planets. It is also used in describing brown dwarfs.... )	Semimajor axis (AU Astronomical unit An astronomical unit is a unit of length equal to about or approximately the mean Earth–Sun distance.... )	Orbital eccentricity Orbital eccentricity The orbital eccentricity of an astronomical body is the amount by which its orbit deviates from a perfect circle, where 0 is perfectly circular, and 1.0 is a parabola, and no longer a closed orbit...	Discovery year	Ref	Notes
Epsilon Eridani Epsilon Eridani Epsilon Eridani is a star in the southern constellation Eridanus, along a declination 9.46° south of the celestial equator. This allows the star to be viewed from most of the Earth's surface. At a distance of 10.5 light years , it has an apparent magnitude of 3.73...	Eridanus Eridanus (constellation) Eridanus is a constellation. It is represented as a river; its name is the Ancient Greek name for the Po River. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations. It is the sixth largest of the modern...			10.5			~20		2008		Associated with ~20 AU planetesimal belt.
Epsilon Eridani Epsilon Eridani Epsilon Eridani is a star in the southern constellation Eridanus, along a declination 9.46° south of the celestial equator. This allows the star to be viewed from most of the Earth's surface. At a distance of 10.5 light years , it has an apparent magnitude of 3.73...	Eridanus Eridanus (constellation) Eridanus is a constellation. It is represented as a river; its name is the Ancient Greek name for the Po River. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations. It is the sixth largest of the modern...			10.5	c	~0.1	~40	~0.3	2002		Associated with outer icy debris disk.
Beta Pictoris Beta Pictoris Beta Pictoris is the second brightest star in the constellation Pictor. It is located 63.4 light years from our solar system, and is 1.75 times as massive and 8.7 times as luminous as the Sun. The Beta Pictoris system is very young, only 8–20 million years old, although it is already in the main...	Pictor Pictor Pictor is a small and faint constellation in the southern sky , located between the brilliant star Canopus and the Large Magellanic Cloud. Its name is Latin for painter, but it is in fact an abbreviation of its original name Equuleus Pictoris, the 'painter's easel', and it is normally represented...			63.4		~0.5	~25	~0.01	2007		Associated with ~32 AU planetesimal belt.
Beta Pictoris Beta Pictoris Beta Pictoris is the second brightest star in the constellation Pictor. It is located 63.4 light years from our solar system, and is 1.75 times as massive and 8.7 times as luminous as the Sun. The Beta Pictoris system is very young, only 8–20 million years old, although it is already in the main...	Pictor Pictor Pictor is a small and faint constellation in the southern sky , located between the brilliant star Canopus and the Large Magellanic Cloud. Its name is Latin for painter, but it is in fact an abbreviation of its original name Equuleus Pictoris, the 'painter's easel', and it is normally represented...			63.4		~0.1	~45	~0.01	2007		Associated with ~52 AU planetesimal belt.

Stars with radial velocity trends

The following stars have long-term radial velocity trends in addition to any confirmed planets they may have. This may indicate the presence of objects (possibly planetary in nature) in long-period orbits in these systems.

Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Distance (ly)	Velocity trend (m/s Metre per second Metre per second is an SI derived unit of both speed and velocity , defined by distance in metres divided by time in seconds....  per year)	Ref	Notes
HD 28185	Eridanus Eridanus (constellation) Eridanus is a constellation. It is represented as a river; its name is the Ancient Greek name for the Po River. It was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations. It is the sixth largest of the modern...			138	11.0		No trend found by Magellan Planet Search Program.
Gliese 849 Gliese 849 |- style="background-color: #A0B0FF;" colspan="3"| Planet|- bgcolor="#FFFAFA"| Gliese 849b || Gliese 849 is a red dwarf star approximately 29 light years away in the constellation of Aquarius.-Planetary system:...	Aquarius Aquarius (constellation) Aquarius is a constellation of the zodiac, situated between Capricornus and Pisces. Its name is Latin for "water-bearer" or "cup-bearer", and its symbol is , a representation of water....			28.7	−4.6

Systems with possible transit variations

The following extrasolar planets have been suggested to have variations in the parameters of their transits across the face of their parent stars which may be caused by perturbations from an additional planet. Note that the planet designations listed in this table refer to the (confirmed) transiting planets: it is the additional perturbing planet that is unconfirmed. The discovery year refers to the discovery of the transit variations.

Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Distance (ly)	Transiting Planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...	Discovery year	Ref	Notes
OGLE-TR-111 OGLE-TR-111 OGLE-TR-111 is a yellow dwarf star approximately 5,000 light-years away in the constellation of Carina . Having an apparent magnitude of about 17 this distant and dim star has not yet been cataloged.- Planetary system :...	Carina Carina (constellation) Carina is a constellation in the southern sky. Its name is Latin for the keel of a ship, and it was formerly part of the larger constellation of Argo Navis until that constellation was divided in three.-Stars:...			5000	b OGLE-TR-111b OGLE-TR-111b is an extrasolar planet approximately 5,000 light-years away in the constellation of Carina . The planet is currently the only confirmed planet orbiting the star OGLE-TR-111 ....	2008		Unconfirmed second transiting planet.
Gliese 436	Leo Leo (constellation) Leo is one of the constellations of the zodiac. Its name is Latin for lion. Its symbol is . Leo lies between dim Cancer to the west and Virgo to the east.-Stars:...			33.48	b Gliese 436 b Gliese 436 b is a Neptune-sized extrasolar planet orbiting the red dwarf star Gliese 436. It was among the smallest known transiting planets in mass and radius until the much smaller Kepler discoveries started coming in 2010.-Discovery:...	2008		Planet candidate Gliese 436 c has been retracted, but alternate solutions are possible.
WASP-3 WASP-3 WASP-3 is a magnitude 10 yellow-white dwarf star located about 727 light-years away in the Lyra constellation.-Planetary system:The extrasolar planet WASP-3b was detected by the SuperWASP project in 2007....					WASP-3 c	2010

Dubious and disproven candidates

This list includes disproven planets: objects which are no longer thought to be planetary, or no longer thought to exist at all, and objects which are detections which are suspected to be non-planetary in nature, for example radial velocity variations which may be caused by stellar variations. This list also contains planets which cannot be confirmed, for example planets detected in microlensing events which have low observational coverage.

Star Star A star is a massive, luminous sphere of plasma held together by gravity. At the end of its lifetime, a star can also contain a proportion of degenerate matter. The nearest star to Earth is the Sun, which is the source of most of the energy on Earth...	Constellation Constellation In modern astronomy, a constellation is an internationally defined area of the celestial sphere. These areas are grouped around asterisms, patterns formed by prominent stars within apparent proximity to one another on Earth's night sky....	Right ascension Right ascension Right ascension is the astronomical term for one of the two coordinates of a point on the celestial sphere when using the equatorial coordinate system. The other coordinate is the declination.-Explanation:...	Declination Declination In astronomy, declination is one of the two coordinates of the equatorial coordinate system, the other being either right ascension or hour angle. Declination in astronomy is comparable to geographic latitude, but projected onto the celestial sphere. Declination is measured in degrees north and...	Distance (ly)	Planet Planet A planet is a celestial body orbiting a star or stellar remnant that is massive enough to be rounded by its own gravity, is not massive enough to cause thermonuclear fusion, and has cleared its neighbouring region of planetesimals.The term planet is ancient, with ties to history, science,...	Discovery year	Detection method	Ref	Notes
WASP-9 WASP-9 WASP-9 is an unidentified magnitude 10 main sequence yellow dwarf star. It is reported to be a G type star of temperature 5900 K. The star was identified as an extrasolar planet host star by the SuperWASP project in 2008, however this discovery was later retracted...				483	b	2008	Transit		Discovery retracted: blended eclipsing binary in hierarchical triple.
HD 11964 HD 11964 HD 11964 is a yellow subgiant star approximately 107 light-years away in the constellation of Cetus. The star is more massive and luminous than our Sun and is barely visible to the naked eye. A wide binary companion star was discovered in 2000...	Cetus Cetus Cetus is a constellation. Its name refers to Cetus, a sea monster in Greek mythology, although it is often called 'the whale' today. Cetus is located in the region of the sky that contains other water-related constellations such as Aquarius, Pisces, and Eridanus.-Ecliptic:Although Cetus is not...			110.8	d	2007	Radial velocity		Not detected in re-reduced data. Detection possibly an effect of Earth's orbital motion.
TMR-1	Taurus Taurus (constellation) Taurus is one of the constellations of the zodiac. Its name is a Latin word meaning 'bull', and its astrological symbol is a stylized bull's head:...			460	C	1998	Imaging		Background star.
HD 33636 HD 33636 HD 33636 is a binary system located approximately 94 light-years away in Orion constellation. The visible member HD 33636 A is a 7th magnitude yellow main-sequence star. It is located at a distance of 93.6 light years from our home planet. It has Fe/H of −0.05 +/- 0.07.A companion was discovered in...	Orion Orion (constellation) Orion, often referred to as The Hunter, is a prominent constellation located on the celestial equator and visible throughout the world. It is one of the most conspicuous, and most recognizable constellations in the night sky...			91.6	b	2002	Radial velocity		Companion is a red dwarf star in a low-inclination orbit.
TW Hydrae TW Hydrae TW Hydrae is an orange dwarf star approximately 176 light-years away in the constellation of Hydra . The star is the closest T Tauri star to the Solar System. TW Hydrae is similar in mass to the Sun, but is only about 5-10 million years old...	Hydra Hydra (constellation) Hydra is the largest of the 88 modern constellations, measuring 1303 square degrees. It has a long history, having been included among the 48 constellations listed by the 2nd century astronomer Ptolemy. It is commonly represented as a water snake...			180	b	2007	Radial velocity		Radial velocity variations caused by stellar spots.
Gliese 436	Leo Leo (constellation) Leo is one of the constellations of the zodiac. Its name is Latin for lion. Its symbol is . Leo lies between dim Cancer to the west and Virgo to the east.-Stars:...			33.48	c	2008	Transit variations		Retracted by authors. Alternate solutions are still possible.
QS Virginis QS Virginis QS Virginis is an eclipsing binary system approximately 157 light-years away from Sun, forming a cataclysmic variable...	Virgo Virgo (constellation) Virgo is one of the constellations of the zodiac. Its name is Latin for virgin, and its symbol is . Lying between Leo to the west and Libra to the east, it is the second largest constellation in the sky...			156.48	b	2009	Eclipsing binary minima		Subsequent timings showed that patterns were not predicted by planetary models. The best fit model for an orbit would have mass 50 MJup (0.05 M☉) in an eccentric, 14-year orbit.
1SWASP-J161732.90+242119.0	Hercules Hercules (constellation) Hercules is a constellation named after Hercules, the Roman mythological hero adapted from the Greek hero Heracles. Hercules was one of the 48 constellations listed by the 2nd century astronomer Ptolemy, and it remains one of the 88 modern constellations today...				b	2007	Transits		No radial velocity variations: planet hypothesis ruled out.
HD 150706 HD 150706 HD 150706 is a 7th magnitude star in the constellation of Ursa Minor. It is a remarkably Sun-like yellow dwarf being only 2% less massive than the Sun....	Ursa Minor Ursa Minor Ursa Minor , also known as the Little Bear, is a constellation in the northern sky. Like the Great Bear, the tail of the Little Bear may also be seen as the handle of a ladle, whence the name Little Dipper...			88.8	b	2002	Radial velocity		Not detected in independent measurements.
MACHO-1997-BLG-41 MACHO-1997-BLG-41 MACHO-1997-BLG-41, commonly abbreviated as 97-BLG-41 or MACHO-97-BLG-41, was a gravitational microlensing event located in Sagittarius which occurred in July 1999. The source star is likely a giant or subgiant star of spectral type K located at a distance of around 8 kiloparsecs...  (lens)	Sagittarius Sagittarius (constellation) Sagittarius is a constellation of the zodiac, the one containing the galactic center. Its name is Latin for the archer, and its symbol is , a stylized arrow. Sagittarius is commonly represented as a centaur drawing a bow...			~10000		1999	Microlensing		Detection explained by orbital motion of binary star in lens system.
Barnard's Star Barnard's star Barnard's Star, also known occasionally as Barnard's "Runaway" Star, is a very low-mass red dwarf star approximately six light-years away from Earth in the constellation of Ophiuchus . In 1916, the American astronomer E.E...	Ophiuchus Ophiuchus Ophiuchus is a large constellation located around the celestial equator. Its name is from the Greek "serpent-bearer", and it is commonly represented as a man grasping the snake that is represented by the constellation Serpens. Ophiuchus was one of the 48 constellations listed by the 2nd-century...			5.98	various	1963	Astrometry Astrometry Astrometry is the branch of astronomy that involves precise measurements of the positions and movements of stars and other celestial bodies. The information obtained by astrometric measurements provides information on the kinematics and physical origin of our Solar System and our Galaxy, the Milky...		Failed independent confirmation. Artifact of telescope maintenance procedures.
PSR B1829−10	Scutum Scutum Scutum is a small constellation introduced in the seventeenth century. Its name is Latin for shield.-History:Scutum is the only constellation that owes its name to a non-classical historical figure...			30000		1991	Pulsar timing		Error in correcting for Earth's orbital motion.
HD 188753 A	Cygnus Cygnus (constellation) Cygnus is a northern constellation lying on the plane of the Milky Way. Its name is the Latinized Hellenic word for swan. One of the most recognizable constellations of the northern summer and autumn, it features a prominent asterism known as the Northern Cross...			149	b	2005	Radial velocity		Planet not detected in follow-up; original data do not support planet hypothesis.
HD 208487 HD 208487 HD 208487 is a 7th magnitude G-type main sequence star located approximately 144 light-years away in the constellation of Grus. It has the same spectral type as our sun, G2V. However, it is probably slightly less massive and more luminous, indicating that it is slightly older...	Grus Grus (constellation) Grus is a constellation in the southern sky. Its name is Latin for the crane, a species of bird. It was introduced in the late sixteenth century.-History:The stars that form Grus were originally considered part of Piscis Austrinus...			144	c	2005	Radial velocity		Radial velocity variations probably caused by stellar activity.
HD 219542 B	Pisces Pisces (constellation) Pisces is a constellation of the zodiac. Its name is the Latin plural for fish, and its symbol is . It lies between Aquarius to the west and Aries to the east...			178	b	2003	Radial velocity		Radial velocity variations caused by stellar activity.
ChaHa8 ChaHa8 ChaHα8 is a brown dwarf star 522 light years from Earth discovered in 2007. It was found to have a companion object of 16-20 Jupiter masses in orbit around it with a period of 1590 days and an eccentricity of 0.49....	Chamaeleon			160 pc	b	2007	Radial velocity		New velocity measurements in 2010 bring the mass above the planetary mass limit (30 to 59 MJ)

Hypothetical extrasolar planet types

Hypothetical types of extrasolar planet include:

• Carbon planet
  Carbon planet
  A carbon planet, also referred to as a diamond planet or carbide planet, is a theoretical type of planet proposed by Marc Kuchner that could form if protoplanetary discs are carbon-rich and oxygen-poor. According to planetary science, it would develop differently from Earth, Mars and Venus, planets...
  
  : a terrestrial planet
  Terrestrial planet
  A terrestrial planet, telluric planet or rocky planet is a planet that is composed primarily of silicate rocks or metals. Within the Solar System, the terrestrial planets are the inner planets closest to the Sun...
  
   composed primarily of carbon, rather than silicon
• Chthonian planet
  Chthonian planet
  A chthonian planet is a hypothetical class of celestial objects resulting from the stripping away of a gas giant's hydrogen and helium atmosphere and outer layers, which is called hydrodynamic escape. Such atmospheric stripping is a likely result of proximity to a star...
  
  : A hot Jupiter
  Hot Jupiter
  Hot Jupiters are a class of extrasolar planet whose mass is close to or exceeds that of Jupiter...
  
   whose outer layers have been completely stripped off by its parent star
• Coreless planet
  Coreless planet
  A coreless planet is a theoretical type of terrestrial planet that has undergone planetary differentiation but nevertheless has no metallic core, i.e...
  
  : A terrestrial planet that has no metallic core
• Goldilocks planet: A terrestrial planet that lies at just the right distance from its star to support life
• Helium planet
  Helium planet
  A helium planet is a theoretical type of planet that may form via mass loss from a low mass white dwarf star. Ordinary gas giant planets such as Jupiter and Saturn consist primarily of hydrogen, with helium as a secondary component...
  
  : a gas giant
  Gas giant
  A gas giant is a large planet that is not primarily composed of rock or other solid matter. There are four gas giants in the Solar System: Jupiter, Saturn, Uranus, and Neptune...
  
   planet formed around a white dwarf
  White dwarf
  A white dwarf, also called a degenerate dwarf, is a small star composed mostly of electron-degenerate matter. They are very dense; a white dwarf's mass is comparable to that of the Sun and its volume is comparable to that of the Earth. Its faint luminosity comes from the emission of stored...
  
   star that is composed mainly of helium instead of hydrogen
• Iron planet
  Iron planet
  ]An iron planet is a type of planet that consists primarily of an iron-rich core with little or no mantle. Mercury is the largest celestial body of this type in our solar system, but larger iron-rich exoplanets may exist.-Origin:...
  
  , a planet like Mercury
  Mercury (planet)
  Mercury is the innermost and smallest planet in the Solar System, orbiting the Sun once every 87.969 Earth days. The orbit of Mercury has the highest eccentricity of all the Solar System planets, and it has the smallest axial tilt. It completes three rotations about its axis for every two orbits...
  
   that consists mainly of an iron core with little mantle
• Ocean planet
  Ocean planet
  An ocean planet is a hypothetical type of planet whose surface is completely covered with an ocean of water.Planetary objects that form in the outer solar system begin as a comet-like mixture of roughly half water and half rock by mass...
  
  : A planet whose surface is covered entirely by deep oceans
• Rogue planet
  Rogue Planet
  - Literature :* "Rogue Planet" , a Dan Dare story that ran in the original Eagle comic from Volume 6, Issue 48 to Volume 8, Issue 7* Rogue Planet , a 2000 novel set in the Star Wars galaxy- Other :...
  
  : A planet not tied to any star, but wandering freely through the galaxy
• Trojan planet: A planet that orbits with a star instead of around it

External links

• Unconfirmed, controversial or retracted planets