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]
| Discovery[1] | |
|---|---|
| Discovered by | Arriagada et al. |
| Discovery site | Las Campanas Observatory |
| Discovery date | January 26, 2010 |
| Doppler spectroscopy | |
| Orbital characteristics[2] | |
| 2.984+0.039 −0.054 AU | |
| Eccentricity | 0.572+0.087 −0.086 |
| 1802+34 −47 d 4.933+0.093 −0.13 yr | |
Average orbital speed | 17 |
| Inclination | 52°+24° −19° or 128°+19° −24° |
| 105°+47° −74° | |
| 2456705+57 −77 | |
| 163.8°+8.8° −8.9° | |
| Semi-amplitude | 38 ± 6 |
| Star | HD 129445 |
| Physical characteristics[2] | |
| Mass | 2.51+1.1 −0.54 MJ |
References
edit- ^ 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.
- ^ 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.
- ^ "Exoplanet-catalog". Exoplanet Exploration: Planets Beyond our Solar System. Retrieved 2020-01-10.
- ^ "HD 129445". Universe Guide. 25 January 2015. Retrieved 2020-01-10.