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HD 121504 b is an exoplanet that is likely to be slightly less massive than Jupiter. Although the radial velocity method that was used to detect the planet can only measure the minimum mass of the planet, it is very unlikely that its true mass would be much higher.[1]

HD 121504 b
Discovery
Discovered byMayor et al.
Discovery siteLa Silla Observatory
Discovery dateAugust 7, 2000
Detection method
Radial velocity
(CORALIE)
Designations
Alternative names
HIP 68162 b
Orbital characteristics
Apastron0.34
50 Gm
Periastron0.32
48 Gm
Semi-major axis
0.33 AU
49 Gm
Eccentricity0.03 ± 0.01
Orbital period (sidereal)
63.33 ± 0.03 d
0.1734 year
Angular distance
7 mas
Longitude of periastron
265° ± 12°
Time of periastron
2,451,450 ± 2 JD
Semi-amplitude50.8 ± 0.9 m/s
StarHD 121504
Physical characteristics
Mass>1.22 MJ
>388 ME

    HD 121504 b orbits the star at a distance of about one third of Earth's distance from the Sun, and has a slightly eccentric orbit.


    References


    1. Mayor, M.; et al. (2004). "The CORALIE survey for southern extra-solar planets XII. Orbital solutions for 16 extra-solar planets discovered with CORALIE". Astronomy and Astrophysics. 415 (1): 391–402. arXiv:astro-ph/0310316. Bibcode:2004A&A...415..391M. doi:10.1051/0004-6361:20034250.



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