Astronomy:HD 129445 b
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Short description: Eccentric Jupiter gas giant exoplanet orbiting the star HD 129445
| 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 astronomical unit|AU | |
| Eccentricity | 0.572+0.087 −0.086 |
| Orbital period | 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° |
| astron|astron|helion}} | 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 Jupiter mass |
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]
References
- ↑ 1.0 1.1 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. doi:10.1088/0004-637X/711/2/1229. Bibcode: 2010ApJ...711.1229A.
- ↑ 2.0 2.1 2.2 Xiao, Guang-Yao et al. (May 2023). "The Masses of a Sample of Radial-Velocity Exoplanets with Astrometric Measurements". Research in Astronomy and Astrophysics 23 (5): 055022. doi:10.1088/1674-4527/accb7e. Bibcode: 2023RAA....23e5022X.
- ↑ "Exoplanet-catalog". https://exoplanets.nasa.gov/exoplanet-catalog/6765/hd-129445-b/.
- ↑ "HD 129445" (in en). 25 January 2015. https://www.universeguide.com/star/hd129445.
Coordinates: 
14h 46m 03.06s, −68° 45′ 45.9″
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