HD 68988 c
Encyclopedia
HD 68988 c is an exoplanet located approximately 192 light-year
s away in the constellation
of Ursa Major
, orbiting the star
HD 68988
. The parameters including period and eccentricity
are highly uncertain. The semimajor axis would be 5.32 AU with an orbital period
of 4100 ± 7300 days (11 years).
Light-year
A light-year, also light year or lightyear is a unit of length, equal to just under 10 trillion kilometres...
s away in the 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....
of Ursa Major
Ursa Major
Ursa Major , also known as the Great Bear, is a constellation visible throughout the year in most of the northern hemisphere. It can best be seen in April...
, orbiting the 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...
HD 68988
HD 68988
HD 68988 is an 8th magnitude G-type star located approximately 192 light-years away in Ursa Major constellation.-Planetary system:There are two planets: HD 68988 b was discovered in 2002 and HD 68988 c was discovered in 2006....
. The parameters including period and 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...
are highly uncertain. The semimajor axis would be 5.32 AU with an 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...
of 4100 ± 7300 days (11 years).