HD 142022 Ab

HD 142022 Ab

Exoplanet		List of exoplanets
Parent star
Star		HD 142022 A
Constellation		Octans
Right ascension	(α)	16^h 10^m 15.0238^s
Declination	(δ)	−84° 13′ 53.802″
Distance		117 ly (35.9 pc)
Spectral type		G9V
Orbital elements
Semi-major axis	(a)	2.93 AU
Periastron	(q)	1.38 AU
Apastron	(Q)	4.48 AU
Eccentricity	(e)	0.53 ± 0.20
Orbital period	(P)	1928 ± 46 d (5.278 y)
Orbital speed	(υ)	16.6 km/s
Argument of periastron	(ω)	170 ± 9°
Time of periastron	(T0)	2,450,971 ± 75 JD
Semi-amplitude	(K)	92 ± 65 m/s
Physical characteristics
Minimum mass	(m sin i)	4.47 MJ (1420 M⊕)
Discovery information
Discovery date		14 February 2005
Discoverer(s)		Eggenberger et al.
Discovery method		Radial Velocity (CORALIE)
Discovery site		La Silla Observatory
Discovery status		Published
Other designations
HIP 79242 b
Database references
Extrasolar Planets Encyclopaedia		data
SIMBAD		data
Exoplanet Archive		data
Open Exoplanet Catalogue		data

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%.

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.

Coordinates: 16^h 10^m 15.0238^s, −84° 13′ 53.802″