HD 129445 b is an eccentric Jupiter gas giant exoplanet orbiting the star HD 129445 which was discovered by the Magellan Planet Search Program in 2010.[1] Its minimum mass is 1.6 times Jupiter's, and it takes 5 years to complete one orbit around HD 129445, a G-type star approximately 219 light years away.[3][4] In 2023, the inclination and true mass of HD 129445 b were determined via astrometry.[2]

HD 129445 b
Discovery[1]
Discovered byArriagada et al.
Discovery siteLas Campanas Observatory
Discovery dateJanuary 26, 2010
Doppler spectroscopy
Orbital characteristics[2]
2.984+0.039
−0.054
 AU
Eccentricity0.572+0.087
−0.086
1802+34
−47
 d

4.933+0.093
−0.13
 yr
17
Inclination52°+24°
−19°
or 128°+19°
−24°
105°+47°
−74°
2456705+57
−77
163.8°+8.8°
−8.9°
Semi-amplitude38 ± 6
StarHD 129445
Physical characteristics[2]
Mass2.51+1.1
−0.54
 MJ

References

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  1. ^ a b Arriagada, Pamela; et al. (2010). "Five Long-period Extrasolar Planets in Eccentric orbits from the Magellan Planet Search Program". The Astrophysical Journal. 711 (2): 1229–35. arXiv:1001.4093. Bibcode:2010ApJ...711.1229A. doi:10.1088/0004-637X/711/2/1229. S2CID 118682009.
  2. ^ 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.
  3. ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-01-10.
  4. ^ "HD 129445". Universe Guide. 25 January 2015. Retrieved 2020-01-10.