List of quasars

This is a list of quasars.

Proper naming of quasar

Quasar

A quasi-stellar radio source is a very energetic and distant active galactic nucleus. Quasars are extremely luminous and were first identified as being high redshift sources of electromagnetic energy, including radio waves and visible light, that were point-like, similar to stars, rather than...

s are by Catalogue Entry, Qxxxx±yy using B1950 coordinates, or QSO Jxxxx±yyyy using J2000 coordinates. They may also use the prefix QSR. There are currently no quasars that are visible to the naked eye.

Quasar	Notes
Twin Quasar Twin Quasar The Twin Quasar , also known as SBS 0957+561, or TXS 0957+561 , was the first identified gravitationally lensed object.-Quasar:...	Associated with a possible planet microlensing event in the gravitational lens galaxy that is doubling the Twin Quasar's image
QSR J1819+3845 Quasar J1819+3845 QSR J1819+3845 is a quasar notable for being the most variable known extragalactic radio source. This quasar shows variations of factors of four or more on a timescale of hours....	Proved interstellar scintillation due to the interstellar medium
CTA-102 CTA-102 In astronomy, CTA 102, also known by its B1950 coordinates as 2230+114 and its J2000 coordinates as J2232+1143 , is a quasar discovered in the early 1960s by a radio survey carried out by the California Institute of Technology...	In 1965, Soviet astronomer Nikolai S. Kardashev declared that this quasar was sending coded messages from an alien civilization.

List of named quasars

This is a list of quasars, with a common name, instead of a designation from a survey, catalogue or list.

Quasar	Origin of name	Notes
Twin Quasar Twin Quasar The Twin Quasar , also known as SBS 0957+561, or TXS 0957+561 , was the first identified gravitationally lensed object.-Quasar:...	From the fact that two images of the same gravitationally lensed quasar is produced.
Einstein Cross Einstein Cross The Einstein Cross or Q2237+030 or QSO 2237+0305 is a gravitationally lensed quasar that sits directly behind ZW 2237+030, Huchra's Lens...	From the fact that gravitational lensing of the quasar forms a near perfect Einstein cross, a concept in gravitational lensing.
Triple Quasar	From the fact that there are three bright images of the same gravitationally lensed quasar is produced.	There are actually four images: the fourth is faint.
Cloverleaf Cloverleaf quasar The Cloverleaf quasar is a bright, gravitationally-lensed quasar.- Quasar :Molecular gas detected in the host galaxy associated with the quasar is the oldest molecular material known and provides evidence of large-scale star formation in the early universe.Thanks to the strong magnification...	From its appearance having similarity to the leaf of a clover. It has been gravitationally lensed into four images, of roughly similar appearance.

List of multiply imaged quasars

This is a list of quasars that as a result of gravitational lens

Gravitational lens

A gravitational lens refers to a distribution of matter between a distant source and an observer, that is capable of bending the light from the source, as it travels towards the observer...

ing appear as multiple images on Earth.

Quasar	Images	Lens	Notes
Twin Quasar Twin Quasar The Twin Quasar , also known as SBS 0957+561, or TXS 0957+561 , was the first identified gravitationally lensed object.-Quasar:...	2	YGKOW G1	First gravitationally lensed object discovered Third largest separation between images (6 ″)
2QZ J1435+0008	2		Largest separation between images (33 ″)
Triple Quasar (PG 1115+080)	4		Originally discovered as 3 lensed images, the fourth image is faint. It was the second gravitationally lensed quasar discovered.
Einstein Cross Einstein Cross The Einstein Cross or Q2237+030 or QSO 2237+0305 is a gravitationally lensed quasar that sits directly behind ZW 2237+030, Huchra's Lens...	4	Huchra's Lens Huchra's Lens Huchra's lens is the lensing galaxy of the Einstein Cross ; it is also called ZW 2237+030 or QSO 2237+0305 G. It exhibits the phenomenon of gravitational lensing that was postulated by Albert Einstein when he realized that gravity would be able to bend light and thus could have lens-like effects....	First Einstein Cross discovered
RXS J1131-1231's quasar	4	RXS J1131-1231's elliptical galaxy	RXS J1131-1231 is the name of the complex, quasar, host galaxy and lensing galaxy, together. The quasar's host galaxy is also lensed into a Chwolson ring about the lensing galaxy. The four images of the quasar are embedded in the ring image.
Cloverleaf Cloverleaf quasar The Cloverleaf quasar is a bright, gravitationally-lensed quasar.- Quasar :Molecular gas detected in the host galaxy associated with the quasar is the oldest molecular material known and provides evidence of large-scale star formation in the early universe.Thanks to the strong magnification...	4		Brightest known high-redshift source of CO Carbon monoxide Carbon monoxide , also called carbonous oxide, is a colorless, odorless, and tasteless gas that is slightly lighter than air. It is highly toxic to humans and animals in higher quantities, although it is also produced in normal animal metabolism in low quantities, and is thought to have some normal... emission
SDSS J1004+411	5	SDSS J1004+4112	First quasar discovered to be multiply image-lensed by a galaxy cluster Galaxy cluster A galaxy cluster is a compact cluster of galaxies. Basic difference between a galaxy group and a galaxy cluster is that there are many more galaxies in a cluster than in a group. Also, galaxies in a cluster are more compact and have higher velocity dispersion. One of the key features of cluster is... Second largest separation between images (15 ″)
QSO B1359+154 QSO B1359+154 QSO B1359+154 is a quasar, or quasi-stellar object, that has a redshift of 3.235. A group of three foreground galaxies at a redshift of about 1 are behaving as gravitational lenses. The result is a rare example of a sixfold multiply imaged quasar....	6	CLASS B1359+154 and three more galaxies	First sextuply-imaged galaxy

List of visual quasar associations

This is a list of double quasars, triple quasars, and the like, where quasars are close together in line-of-sight, but not physically related.

Quasars	Count	Notes
QSO 1548+115 4C 11.50 (z=0.436) QSO B1548+115B (z=1.901)	2
QSO 1146+111	8
z represents redshift Redshift In physics , redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum... , a measure of recessional velocity and inferred distance due to cosmological expansion

List of physical quasar groups

This is a lise of binary quasars, trinary quasars, and the like, where quasars are physically close to each other.

Quasars	Count	Notes
LBQS 1429-008 LBQS 1429-008 LBQS 1429-008 is a physical triple quasar. It was the first physical triple discovered.... (QQQ 1432-0106)	3	First trinary quasar discovered. It was first discovered as a binary quasar, before the third quasar was found.
Q2345+007 Q2345+007A Q2345+007B	2	Originally thought to be a doubly imaged quasar, but actually a binary quasar.

List of quasars with apparent superluminal jet motion

This is a list of quasars with jets that appear to be superluminal

Superluminal motion

In astronomy, superluminal motion is the apparently faster-than-light motion seen in someradio galaxies, quasars and recently also in some galactic sources called microquasars...

due to relativistic effects and line-of-sight orientation. Such quasars are sometimes referred to as superluminal quasars.

Quasar	Superluminality	Notes
3C 279	4c	First quasar discovered with superluminal jets.
3C 179	7.6c	Fifth discovered, first with double lobes
3C 273		This is also the first quasar ever identified.
3C 216
3C 345
3C 380
4C 69.21 (Q1642+690, QSO B1642+690)
8C 1928+738 (Q1928+738, QSO J1927+73, Quasar J192748.6+735802)
PKS 0637-752
QSO B1642+690

It should be noted that quasars that have a recessional velocity greater than the speed of light (c) are very common. Any quasar with z>1 is going away from us in excess of c. Early attempts to explain superlumic quasars resulted in convoluted explanations with a limit of z=2.326, or in the extreme z<2.4. z=1 means a redshift indicating travel away from us at the speed of light. The majority of quasars lie between z=2 and z=5 .

Firsts

Title	Quasar	Year	Data	Notes
First "star" discovered later found to be a quasar
First radio source discovered later found to be a quasar
First quasar discovered	3C 48	1960		first radio source for which optical identification was found, that was a star-like looking object
First quasar identified	3C 273	1962		first radio-"star" found to be at a high redshift with a non-stellar spectrum.
First radio-quiet quasar	QSO B1246+377 (BSO 1)	1965		The first radio-quiet quasi-stellar objects (QSO) were called Blue Stellar Objects or BSO, because they appeared like stars and were blue in color. They also had spectra and redshifts like radio-loud quasi-stellar radio-sources (QSR), so became quasars.
First host galaxy of a quasar discovered	3C 48	1982
First quasar found to seemingly not have a host galaxy	HE0450-2958 HE0450-2958 HE0450-2958 is an unusual quasar. It has been called the "naked quasar" and the "quasar without a home" because it appears to lack a host galaxy. It is estimated to lie approximately one billion parsecs away.-History:... (Naked Quasar)	2005		Some disputed observations suggest a host galaxy, others do not.
First quasar containing a recoiling supermassive black hole	SDSS J0927+2943 SDSS J0927+2943 SDSS J0927+2943 is an unusual quasar. It exhibits two sets of optical emission lines with different redshifts. The origin of the two emission line systems is believed to be a gravitational wave recoil event: the ejection of a supermassive black hole from the center of the host galaxy...	2008		Two optical emission line systems separated by 2650 km/s
First gravitationally lensed quasar identified	Twin Quasar Twin Quasar The Twin Quasar , also known as SBS 0957+561, or TXS 0957+561 , was the first identified gravitationally lensed object.-Quasar:...	1979	Lensed into 2 images	The lens is a galaxy known as YGKOW G1
First quasar found with a jet with apparent superluminal motion	3C 279	1971
First quasar found with the classic double radio-lobe structure	3C 47 3C 47 3C 47 is a Seyfert galaxy / lobe-dominated quasar located in the constellation Pisces. It was the first quasar found with the classic double radio-lobe structure....	1964
First quasar found to be a X-ray source	3C 273	1967
First "dustless" quasar found	QSO J0303-0019 QSO J0303-0019 QSO J0303-0019 is a distant quasar in the z≥6 regime. It is one of the first two quasars discovered that appear to be "dust-free", the other being QSO J0005-0006.... and QSO J0005-0006 QSO J0005-0006 QSO J0005-0006 is a distant quasar in the ~z≥6 regime. It is one of the first two quasars discovered that appear to be "dust-free", the other being QSO J0303-0019...	2010

Extremes

Title	Quasar	Data	Notes
Optically brightest on Earth	3C 273	Apparent Magnitude Apparent magnitude The apparent magnitude of a celestial body is a measure of its brightness as seen by an observer on Earth, adjusted to the value it would have in the absence of the atmosphere... ~ 12.9	Absolute Magnitude: -26.7
Seemingly optically brightest	APM 08279+5255 APM 08279+5255 APM 08279+5255 is a quasar in the constellation Lynx, that is notable for being a particularly good example of a gravitational lens. When originally discovered, the combination of its high redshift and brightness made it the most luminous object known- the light left the quasar more than 12...	Seeming Absolute Magnitude Absolute magnitude Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth... −32.2	This quasar is gravitationally lensed Gravitational lens A gravitational lens refers to a distribution of matter between a distant source and an observer, that is capable of bending the light from the source, as it travels towards the observer... , it's actual absolute magnitude is estimated to be -30.5
Optically brightest at source		Absolute Magnitude Absolute magnitude Absolute magnitude is the measure of a celestial object's intrinsic brightness. it is also the apparent magnitude a star would have if it were 32.6 light years away from Earth...
Most powerful quasar radio source	3C 273		Also the most powerful radio source in the sky
Most powerful
Most variable quasar radio source	QSO J1819+3845 Quasar J1819+3845 QSR J1819+3845 is a quasar notable for being the most variable known extragalactic radio source. This quasar shows variations of factors of four or more on a timescale of hours.... (Q1817+387)		Also the most variable extrasolar radio source
Least variable quasar radio source
Most variable quasar optical source
Least variable quasar optical source
Most distant	ULAS J1120+0641 ULAS J1120+0641 ULAS J1120+0641 is a quasar, the discovery of which was reported on 29 June 2011. , it is the most distant known quasar, and it was the first quasar discovered beyond a redshift of 7. Various news reports, including those provided by the Associated Press, have stated that it is the brightest object...	z=7.085
Most distant radio-quiet quasar
Most distant radio-loud quasar	QSO J1427+3312	z=6.12	Found June 2008
Most distant blazar Blazar A blazar is a very compact quasar associated with a presumed supermassive black hole at the center of an active, giant elliptical galaxy... quasar	QSO J0906+6930 Q0906+6930 Q0906+6930 is the most distant known blazar , discovered in July, 2004. The engine of the blazar is a supermassive black hole approximately 2 billion times the mass of the Sun . The event horizon volume is on the order of 1000 times that of the Solar System...	z=5.47
Least distant	3C273 3C273 3C 273 is a quasar located in the constellation Virgo. It was the first quasar ever to be identified.It is the optically brightest quasar in our sky , and one of the closest with a redshift, z, of 0.158. A luminosity distance of DL = may be calculated from z...	z=0.158

First quasars found

First 10 Quasars Identified
Rank	Quasar	Date
1	3C 273	1963
2	3C 48	1963
3	3C 47 3C 47 3C 47 is a Seyfert galaxy / lobe-dominated quasar located in the constellation Pisces. It was the first quasar found with the classic double radio-lobe structure....	1964
3	3C 147 3C 147 3C 147 is a compact steep-spectrum quasar that was discovered in 1964. It is located in the constellation Auriga not far in the sky from the 5th magnitude star Omicron Aurigae....	1964
5	CTA 102	1965
5	3C 287	1965
5	3C 254	1965
5	3C 245	1965
5	3C 9 3C 9 3C 9 is a lobe-dominated quasar located in the constellation Pisces.In 1965, it was the most distant object discovered at the time of discovery. This was the first quasar with a redshift in excess of 2.-External links:* Wikisky of 3C 9...	1965
These are the first quasars which were found and had their redshifts determined.

Most distant quasars

Quasars with z > 6
Quasar	Distance	Notes
ULAS J1120+0641 ULAS J1120+0641 ULAS J1120+0641 is a quasar, the discovery of which was reported on 29 June 2011. , it is the most distant known quasar, and it was the first quasar discovered beyond a redshift of 7. Various news reports, including those provided by the Associated Press, have stated that it is the brightest object... (ULAS J112001.48+064124.3)	z=7.085	Most distant quasar. First quasar with redshift over 7.
CFHQS J2329-0301 CFHQS J2329-0301 CFHQS J2329-0301 is a quasar discovered in 2007 by the Canada-France-Hawaii High-z Quasar Survey using the Canada-France-Hawaii Telescope. It was the farthest known quasar with a distance of about 12.7 billion light years from Earth. Because it is very bright, its light can be used to determine... (CFHQS J232908-030158)	z=6.43	Former most distant quasar
SDSS J114816.64+525150.3 (SDSS J1148+5251)	z=6.419	Former most distant quasar
SDSS J1030+0524 (SDSSp J103027.10+052455.0)	z=6.28	Former most distant quasar. First quasar with redshift over 6.
SDSS J104845.05+463718.3 (QSO J1048+4637)	z=6.23
SDSS J162331.81+311200.5 (QSO J1623+3112)	z=6.22
CFHQS J0033-0125 (CFHQS J003311-012524)	z=6.13
SDSS J125051.93+313021.9 (QSO J1250+3130)	z=6.13
CFHQS J1509-1749 (CFHQS J150941-174926)	z=6.12
QSO B1425+3326 / QSO J1427+3312	z=6.12	Most distant radio-quasar
SDSS J160253.98+422824.9 (QSO J1602+4228)	z=6.07
SDSS J163033.90+401209.6 (QSO J1630+4012)	z=6.05
CFHQS J1641+3755 (CFHQS J164121+375520)	z=6.04
SDSS J113717.73+354956.9 (QSO J1137+3549)	z=6.01
SDSS J081827.40+172251.8 (QSO J0818+1722)	z=6.00	For reference
SDSSp J130608.26+035626.3 (QSO J1306+0356)	z=5.99	For reference
z>6 quasars are used to explore the reionization era Reionization In Big Bang cosmology, reionization is the process that reionized the matter in the universe after the "dark ages," and is the second of two major phase changes of gas in the universe. As the majority of baryonic matter is in the form of hydrogen, reionization usually refers to the reionization of... z represents redshift Redshift In physics , redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum... , a measure of recessional velocity and inferred distance due to cosmological expansion

Most Distant Quasar by Type
Type	Quasar	Date	Distance
Absolute most distant quasar	ULAS J1120+0641 ULAS J1120+0641 ULAS J1120+0641 is a quasar, the discovery of which was reported on 29 June 2011. , it is the most distant known quasar, and it was the first quasar discovered beyond a redshift of 7. Various news reports, including those provided by the Associated Press, have stated that it is the brightest object...	2011	z=7.085
Most distant radio loud quasar	QSO B1425+3326 / QSO J1427+3312	2008	z=6.12
Most distant radio quiet quasar			z=
Most distant OVV quasar			z=
z represents redshift Redshift In physics , redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum... , a measure of recessional velocity and inferred distance due to cosmological expansion

Most Distant Quasar Titleholders
Quasar	Date	Distance	Notes
ULAS J1120+0641 ULAS J1120+0641 ULAS J1120+0641 is a quasar, the discovery of which was reported on 29 June 2011. , it is the most distant known quasar, and it was the first quasar discovered beyond a redshift of 7. Various news reports, including those provided by the Associated Press, have stated that it is the brightest object... (ULAS J112001.48+064124.3)	2011 -	z=7.085	This was not the most distant object when discovered. This was the first quasar found beyond redshift 7.
CFHQS J2329-0301 CFHQS J2329-0301 CFHQS J2329-0301 is a quasar discovered in 2007 by the Canada-France-Hawaii High-z Quasar Survey using the Canada-France-Hawaii Telescope. It was the farthest known quasar with a distance of about 12.7 billion light years from Earth. Because it is very bright, its light can be used to determine... (CFHQS J232908-030158)	2007 − 2011	z=6.43	This was not the most distant object when discovered. It did not exceed IOK-1 IOK-1 IOK-1 is a distant galaxy in Coma Berenices. When discovered in 2006, it was the oldest and most distant galaxy ever found, at redshift 6.96.... (z=6.96), which was discovered in 2006.
SDSS J114816.64+525150.3 (SDSS J1148+5251)	2003 − 2007	z=6.419	This was not the most distant object when discovered. It did not exceed HCM 6A galaxy lensed by Abell 370 Abell 370 Abell 370 is a galaxy cluster located approximately 6 billion light years away from the Earth , in the constellation Cetus. Its core is made up of several hundred galaxies... at z=6.56, discovered in 2002. Also discovered around the time of discovery was a new most distant galaxy, SDF J132418.3+271455 at z=6.58.
SDSS J1030+0524 (SDSSp J103027.10+052455.0)	2001 − 2003	z=6.28	This was the most distant object when discovered. This was the first object beyond redshift 6 when discovered.
SDSS 1044-0125 (SDSSp J104433.04-012502.2)	2000 − 2001	z=5.82	This was the most distant object discovered at the time of discovery. It exceeded galaxy SSA22-HCM1 (z=5.74) as the most distant object (discovered 1999).
RD300 (RD J030117+002025)	2000	z=5.50	M_B=-22.7 This was not the most distant object discovered at time of discovery. It did not surpass galaxy SSA22-HCM1 (z=5.74) (discovered 1999).
SDSSp J120441.73−002149.6 (SDSS J1204-0021)	2000	z=5.03	This was not the most distant object discovered at time of discovery. It did not surpass galaxy SSA22-HCM1 (z=5.74) (discovered 1999).
SDSSp J033829.31+002156.3 (QSO J0338+0021)	1998 − 2000	z=5.00	This was the first quasar discovered breaking redshift 5. This was not the most distant object discovered at time of discovery. It did not exceed the galaxy BR1202-0725 LAE at z=5.64 discovered earlier in 1998.
PC 1247+3406	1991 − 1998	z=4.897	This was the most distant object discovered at time of discovery.
PC 1158+4635	1989 − 1991	z=4.73	This was the most distant object discovered at the time of discovery.
Q0051-279	1987 − 1989	z=4.43	This was the most distant object discovered at the time of discovery.
Q0000-26 (QSO B0000-26)	1987	z=4.11	This was the most distant object discovered at the time of discovery.
PC 0910+5625 (QSO B0910+5625)	1987	z=4.04	This was the most distant object discovered at the time of discovery. This was the second quasar discovered with a redshift over 4.
Q0046–293 (QSO J0048-2903)	1987	z=4.01	First quasar discovered with a redshift over 4. This was the most distant object discovered at the time of discovery.
Q1208+1011 (QSO B1208+1011)	1986 − 1987	z=3.80	This was the most distant object discovered at the time of discovery. This is also a gravitationally-lensed double-image quasar, and at the time of discovery to 1991, had the least angular separation between images, 0.45 ″.
PKS 2000-330 PKS 2000-330 PKS 2000-330 is a quasar located in the constellation Sagittarius. When identified in 1982, it was the most distant and most luminous object known.-Distance measurements:... (QSO J2003-3251 , Q2000-330)	1982 − 1986	z=3.78	This was the most distant object discovered at the time of discovery.
OQ172 (QSO B1442+101)	1974 − 1982	z=3.53	This was the most distant object discovered at the time of discovery.
OH471 (QSO B0642+449)	1973 − 1974	z=3.408	First quasar discovered with a redshift greater than 3. Nickname was "the blaze marking the edge of the universe". This was the most distant object discovered at the time of discovery.
4C 05.34	1970 − 1973	z=2.877	This was the most distant object discovered at the time of discovery. Its redshift was so much greater than the previous record that it was believed to be erroneous, or spurious.
5C 02.56 (7C 105517.75+495540.95)	1968 − 1970	z=2.399	This was the most distant object when discovered.
4C 25.05 (4C 25.5)	1968	z=2.358	This was the most distant object when discovered.
PKS 0237-23 (QSO B0237-2321)	1967 − 1968	z=2.225	This was the most distant object discovered at the time of discovery.
4C 12.39 (Q1116+12 , PKS 1116+12)	1966 − 1967	z=2.1291	This was the most distant object when discovered.
4C 01.02 (Q0106+01 , PKS 0106+1)	1965 − 1966	z=2.0990	This was the most distant object when it was discovered.
3C 9 3C 9 3C 9 is a lobe-dominated quasar located in the constellation Pisces.In 1965, it was the most distant object discovered at the time of discovery. This was the first quasar with a redshift in excess of 2.-External links:* Wikisky of 3C 9...	1965	z=2.018	This was the most distant object discovered at the time of discovery. This was the first quasar with a redshift in excess of 2.
3C 147 3C 147 3C 147 is a compact steep-spectrum quasar that was discovered in 1964. It is located in the constellation Auriga not far in the sky from the 5th magnitude star Omicron Aurigae....	1964 − 1965	z=0.545	This was the first quasar to become the most distant object in the universe, beating radio galaxy 3C 295 3C 295 3C 295 is a narrow-line radio galaxy located in the constellation of Boötes. With a redshift of 0.464, it is approximately 5 billion light-years from Earth... .
3C 48	1963 − 1964	z=0.367	Redshift was discovered after publication of 3C273's results prompted researchers to re-examine spectroscopic data. This was the second quasar redshift measured. This not the most distant object discovered at the time of discovery. The radio galaxy 3C 295 3C 295 3C 295 is a narrow-line radio galaxy located in the constellation of Boötes. With a redshift of 0.464, it is approximately 5 billion light-years from Earth... was found in 1960 to be at z=0.461
3C 273	1963	z=0.158	First redshift identified for a quasar. This not the most distant object discovered at the time of discovery. The radio galaxy 3C 295 3C 295 3C 295 is a narrow-line radio galaxy located in the constellation of Boötes. With a redshift of 0.464, it is approximately 5 billion light-years from Earth... was found in 1960 to be at z=0.461
z represents redshift Redshift In physics , redshift happens when light seen coming from an object is proportionally increased in wavelength, or shifted to the red end of the spectrum... , a measure of recessional velocity and inferred distance due to cosmological expansion

The first time that quasars became the most distant object in the universe was in 1964. Quasars would remain the most distant objects in the universe until 1997, when a pair of non-quasar galaxies would take the title. ( galaxies CL 1358+62 G1 & CL 1358+62 G2 - lensed by galaxy cluster CL 1358+62

CL1358+62

CL 1358+62 is a galaxy cluster located at z=0.33 redshift. Behind the cluster, lensed into a red arc is an infant galaxy that was the farthest object in the observable universe for a few months. It had a record redshift of z=4.92 and was discovered on July 31, 1997 by M. Franx and G. Illingsworth....

)

Most powerful quasars

10 Brightest Quasars
Rank	Quasar	Data	Notes
2	PHL 1811

External links

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