HD 142022 Ab

HD 142022 Ab is an exoplanet discovered by the radial velocity method by Eggenberger et al. in 2005 after finding that HD 142022 A is wobbling which indicated the presence of a massive planet, designating as HD 142022 Ab, with mass of 4.5 times Jupiter. It has a relatively wide separation between a planet and a star with nearly 3 AU, which takes 1928 days or 5.28 years to revolve. As it is typical for long-period planets, it has a relatively high eccentricity of 53±20%.

HD 142022 Ab

Discovery
Discovered by	Eggenberger et al.
Discovery site	La Silla Observatory
Discovery date	14 February 2005
Detection method	Radial Velocity (CORALIE)
Orbital characteristics
Apastron	4.48 AU (670,000,000 km)
Periastron	1.38 AU (206,000,000 km)
Semi-major axis	2.93 AU (438,000,000 km)
Eccentricity	0.53 ± 0.20
Orbital period	1928 ± 46 d 5.278 y
Average orbital speed	16.6
Time of periastron	2,450,971 ± 75
Argument of periastron	170 ± 9
Semi-amplitude	92 ± 65
Star	HD 142022 A

See also

• HD 141937 b
• HD 142415 b

References

• Eggenberger; Mayor, M.; Naef, D.; Pepe, F.; Queloz, D.; Santos, N. C.; Udry, S.; Lovis, C. (2006). "The CORALIE survey for southern extrasolar planets XIV. HD 142022 b: a long-period planetary companion in a wide binary". Astronomy and Astrophysics. 447 (3): 1159–1163. arXiv:astro-ph/0510561. Bibcode:2006A&A...447.1159E. doi:10.1051/0004-6361:20053720. Retrieved December 12, 2007.

External links

• "HD 142022 A". Exoplanets. Archived from the original on 2012-03-04. Retrieved 2008-11-01.