HD 142022 Ab

HD 142022 Ab
Discovery^[1]
Discovered by	Eggenberger et al.
Discovery site	La Silla Observatory
Discovery date	14 February 2005
Detection method	Radial Velocity (CORALIE)
Orbital characteristics^[2]
Semi-major axis	2.939±0.062 AU
Eccentricity	0.506+0.071 −0.06
Orbital period (sidereal)	1935+30 −27 d 5.297+0.082 −0.073 yr
Average orbital speed	16.6
Inclination	71°±13° or 109°±13°
Longitude of ascending node	141°±19°
Time of periastron	2456730+50 −44
Argument of periastron	168.5°+4.1° −5.0°
Semi-amplitude	92 ± 65
Star	HD 142022 A
Physical characteristics^[2]
Mass	4.51+0.91 −0.61 M_J

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]

References

^ ^a ^b 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.
^ ^a ^b ^c 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.

External links

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

Constellation of Octans

Stars

Bayer	α β γ¹ γ² γ³ δ ε ζ η θ ι κ λ μ¹ μ² ν ξ ο π¹ π² ρ σ (Polaris Australis) τ υ φ χ ψ ω B
Variable	R RV UV AO BP BQ CC CF CK CW DR FT
HR	47 512 525 1271 2848 4595 4709 6552 6837 6912 6994 7494 7698 7785 7812 8129 8176 8201 8234 8370 8380 8432 8526 8577 8786 8810 8849 8935 8957 8995
HD	142022 165338 166066 172226 212301
Other	EUVE J0317-85.5 Gliese 877 LHS 475 TOI-4342 W2150AB

Exoplanets	2MASS J2126–8140 HD 142022 Ab HD 212301 b LHS 475 b

Galaxies

NGC	2573 7095 7098
Other	PGC 10922

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See also

References

External links