HD 99109 b
| Exoplanet | List of exoplanets | |
|---|---|---|
| Parent star | ||
| Star | HD 99109 | |
| Constellation | Leo | |
| Right ascension | (α) | 11h 24m 17.359s[1] |
| Declination | (δ) | –01° 31′ 44.66″[1] |
| Apparent magnitude | (mV) | 9.1 |
| Distance | 160 ± 10[1] ly (50 ± 3[1] pc) | |
| Spectral type | K0V | |
| Orbital elements | ||
| Semi-major axis | (a) | 1.105 ± 0.065 AU |
| Eccentricity | (e) | 0.09 ± 0.16 |
| Orbital period | (P) | 439.3 ± 5.6 d |
| Argument of periastron |
(ω) | 256° |
| Time of periastron | (T0) | 2,411,310 ± 80 JD |
| Semi-amplitude | (K) | 14.1 ± 2.2 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 0.502 ± 0.07 MJ |
| Discovery information | ||
| Discovery date | 15 July 2006 | |
| Discoverer(s) | Butler et al.[2] | |
| Discovery method | Radial velocity | |
| Discovery site |  United States | |
| Discovery status | Confirmed | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HD 99109 b is an extrasolar planet approximately 197 light-years away in the constellation of Leo. The planet was confirmed in 2006 to be orbiting the orange dwarf star HD 99109. The planet is about one half the mass of Jupiter, classifying the planet as a Jovian planet. The orbital eccentricity is about the same as Mars.[2]
- 1 2 3 4 van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
- 1 2 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.
External links
- "HD 99109". Exoplanets. Retrieved 2008-07-18.
- "HD 99109 b". PlanetQuest. Retrieved 2008-07-18.
Coordinates: 
11h 24m 17.358s, −01° 31′ 44.674″
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