HD 30562 b

HD 30562 b is an extrasolar planet which orbits the F-type main sequence star HD 30562, located approximately 85.4 light years away in the constellation Eridanus.^[1]

HD 30562 b

Discovery[1]
Discovery date	August 12, 2009
Detection method	Radial velocity
Orbital characteristics[2]
Semi-major axis	2.299+0.032 −0.033 AU
Eccentricity	0.748+0.036 −0.042
Orbital period (sidereal)	1153+14 −15 d 3.158+0.039 −0.042 yr
Inclination	65°+17° −22° or 115°+22° −17°
Longitude of ascending node	92°+64° −67°
Time of periastron	2455914+17 −18
Argument of periastron	78.2°+6.7° −6.4°
Star	HD 30562
Physical characteristics[2]
Mass	1.47+0.45 −0.18 MJ

This planet is unusual that it orbits in a very oval path like comets in the Solar System. The semimajor axis of the orbit is 2.30 AU and it ranges from 0.55 AU to 4.05 AU. It has a minimum mass 1.29 times that of Jupiter. The orbital period of this planet is 38 months compared with 12 months for the Earth.

This eccentric Jupiter was discovered on August 12, 2009 by using the radial velocity method which was designed to study the wobble of stars caused by their planet's gravity over the course of their orbit. Another study confirmed it in 2012.^[3] In 2023, the inclination and true mass of HD 30562 b were determined via astrometry.^[2]

References

1. Fischer, Debra; et al. (2009). "Five planets and an independent confirmation of HD 196885 Ab from Lick Observatory". The Astrophysical Journal. 703 (2): 1545–1556. arXiv:0908.1596. Bibcode:2009ApJ...703.1545F. doi:10.1088/0004-637X/703/2/1545. S2CID 15524804.
2. Xiao, Guang-Yao; Liu, Yu-Juan; et al. (March 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5). arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e. S2CID 257663647.
3. Marmier, M.; et al. (2013). "The CORALIE survey for southern extrasolar planets XVII. New and updated long period and massive planets". Astronomy and Astrophysics. 551. A90. arXiv:1211.6444. Bibcode:2013A&A...551A..90M. doi:10.1051/0004-6361/201219639. S2CID 59467665.