HD 46375 b
| Discovery[1][2] | |
|---|---|
| Discovered by | California and Carnegie Planet Search |
| Discovery site | W. M. Keck Observatory |
| Discovery date | March 29, 2000 |
| Doppler spectroscopy | |
| Orbital characteristics | |
| Apastron | 0.0423 AU (6,330,000 km) |
| Periastron | 0.0373 AU (5,580,000 km) |
| 0.0398 ± 0.0023 AU (5,950,000 ± 340,000 km) | |
| Eccentricity | 0.063±0.026 |
| 3.023573±0.000065 d 0.008277947 y | |
Average orbital speed | 144 |
| 2,451,071.53±0.19 | |
| 114±24 | |
| Semi-amplitude | 33.65±0.74 |
| Star | HD 46375 |
| Physical characteristics | |
| 1.02 RJ[3] | |
| Mass | >0.23 MJ[3] |
HD 46375 b is an extrasolar planet located approximately 109 light-years away in the constellation of Monoceros, orbiting the star HD 46375. With 79 Ceti b on March 29, 2000, it was joint first known extrasolar planet less massive than Saturn orbiting a normal star.[1] The planet is a "hot Jupiter", a type of planet that orbits very close to its parent star. In this case the orbital distance is only a tenth that of the planet Mercury. No transit of the planet has been detected, so its inclination must be less than 83°. Because the inclination is unknown, the true mass of the planet is not known.[2]
References
- ^ a b "Keck astronomers discover planets smaller than saturn" (Press release). Kamuela, Hawaii: W. M. Keck Observatory. March 29, 2000. Retrieved August 13, 2019.
- ^ a b Marcy, Geoffrey W.; et al. (2000). "Sub-Saturn Planetary Candidates of HD 16141 and HD 46375". The Astrophysical Journal Letters. 536 (1): L43–L46. arXiv:astro-ph/0004326. Bibcode:2000ApJ...536L..43M. doi:10.1086/312723. PMID 10849416. S2CID 119530785.
- ^ a b "The Extrasolar Planet Encyclopaedia — HD 46375 A b". Extrasolar Planets Encyclopaedia. Paris Observatory.
- Butler, R. P.; et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal. 646 (1): 505–522. arXiv:astro-ph/0607493. Bibcode:2006ApJ...646..505B. doi:10.1086/504701. S2CID 119067572.
External links
- "Notes for planet HD 46375 b". Extrasolar Planets Encyclopaedia. Archived from the original on 2012-06-02. Retrieved 2008-08-23.
- "HD 46375". Exoplanets. Archived from the original on 2009-11-25. Retrieved 2008-08-23.