HD 129445 b

HD 129445 b

Discovery [1]
Discovered by	Arriagada et al.
Discovery site	Las Campanas Observatory
Discovery date	January 26, 2010
Detection method	Doppler spectroscopy
Orbital characteristics [2]
Semi-major axis	2.984+0.039 −0.054  AU
Eccentricity	0.572+0.087 −0.086
Orbital period (sidereal)	1802+34 −47  d 4.933+0.093 −0.13  yr
Average orbital speed	17
Inclination	52°+24° −19° or 128°+19° −24°
Longitude of ascending node	105°+47° −74°
Time of periastron	2456705+57 −77
Argument of periastron	163.8°+8.8° −8.9°
Semi-amplitude	38 ± 6
Star	HD 129445
Physical characteristics [2]
Mass	2.51+1.1 −0.54  MJ

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] In 2023, the inclination and true mass of HD 129445 b were determined via astrometry. ^[2]

References

1. 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. 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.