GJ 3021 b

GJ 3021 b, also known as HD 1237 b, respectively, is a substellares object with a minimum mass of about 3.4 Jupiter masses and thus an exoplanet candidate; it accompanies the sun-like star GJ 3021st The detection of GJ 3021 b succeeded Naef et al. using the radial velocity method, and was published in 2000.

Web properties

The semi-major axis of the orbit of GJ 3021 b measures approximately 0.5 astronomical units, the orbital eccentricity is relatively high at 0.5 and corresponds to a periapsis of 0.2 and an apoapsis of 0.7 astronomical units. Transferred to the dimensions of the solar system would then cut the body the orbits of Mercury and Venus. A complete revolution takes 134 days to complete.

Physical Properties

GJ 3021 b has a minimum mass of 3.4 Jupiter masses ( about 1100 Earth masses ). As in most cases, for objects which have been detected by measuring the radial velocity of the orbital inclination of the object is not known. In a study published in 2001, an orbital inclination of 12 ° was determined by the analysis of data of the astrometric satellite Hipparcos, which would have the consequence that the mass of GJ 3021 b would be to settle above 16 Jupiter masses. Further analysis showed, however, that the data from Hipparcos were not accurate enough to make a statement about the orbital inclination can.