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, with a minimum mass 4.5 times Jupiter. It has a relatively wide separation between the planet and the star of nearly 3 AU, and takes 1928 days or 5.28 years to revolve. As is common for long-period planets, it has a relatively high eccentricity of 53±20%.[1] In 2023, the inclination and true mass of HD 142022 Ab were determined via astrometry.[2]

HD 142022 Ab
Discovery[1]
Discovered byEggenberger et al.
Discovery siteLa Silla Observatory
Discovery date14 February 2005
Radial Velocity
(CORALIE)
Orbital characteristics[2]
2.939±0.062 AU
Eccentricity0.506+0.071
−0.06
1935+30
−27 d
5.297+0.082
−0.073 yr
16.6
Inclination71°±13° or 109°±13°
141°±19°
2456730+50
−44
168.5°+4.1°
−5.0°
Semi-amplitude92 ± 65
StarHD 142022 A
Physical characteristics[2]
Mass4.51+0.91
−0.61 MJ

    See also

    References
    1. 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. S2CID 18200070. Retrieved December 12, 2007.
    2. Xiao, Guang-Yao; Liu, Yu-Juan; et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics. 23 (5): 055022. arXiv:2303.12409. Bibcode:2023RAA....23e5022X. doi:10.1088/1674-4527/accb7e.
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