HD 117207
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Centaurus |
| Right ascension | 13h 29m 21.114s |
| Declination | −35º 34' 15.59″ |
| Apparent magnitude (V) | 7.26 |
| Absolute magnitude (V) | 4.67 |
| Distance | 108 ly (33 pc) |
| Spectral type | G8IV-V |
| Other designations | |
HD 117207 is a star in the constellation Centaurus. It is a yellow dwarf or subgiant star of mass 7% greater than our Sun. It has apparent magnitude 7.26 which is not visible to the naked eye and has absolute magnitude of 4.67, which is visible to the naked eye if it were located 10 parsecs away from the Earth. It is over 108 light years away from us.
[edit] HD 117207 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 3.79 AU |
| Eccentricity | (e) | 0.144±0.035 |
| Orbital period | (P) | 2597±41 d |
| Angular distance | (θ) | 115 mas |
| Longitude of periastron |
(ω) | 81.7±19.9° |
| Time of periastron | (T0) | 2450666.43±148.89 JD |
| Semi-amplitude | (K) | 26.6±0.93 m/s |
| Physical characteristics | ||
| Mass | (m) | >1.88 MJ |
| Discovery information | ||
| Discovery date | 2004 | |
| Discoverer(s) | Marcy et al. | |
| Detection method | radial velocity | |
| Discovery site | USA | |
| Discovery status | Published | |
HD 117207 b is the Ammonia Jovian planet orbiting at 3.8 astronomical units taking about 2597 days to complete its orbit around HD 117207. Its orbit is moderate in eccentricity. This planet was discovered in 2004 by Marcy.
[edit] References
- MARCY G., BUTLER P., VOGT S., FISCHER D., HENRY G., LAUGHLIN G., WRIGHT J. & JOHNSON J. (2005). "Five New Extrasolar Planets". ApJ. 619: 570.
[edit] External links
- Notes for star HD 117207. The Extrasolar Planets Encyclopaedia. Retrieved on December 7, 2007.
- Notes for planet HD 117207 b. The Extrasolar Planets Encyclopaedia. Retrieved on December 7, 2007.
- HD 117207 – Yellow Main Sequence. Extrasolar Visions. Retrieved on December 7, 2007.
- HD 117207 b – Jupiter-twin. Extrasolar Visions. Retrieved on December 7, 2007.
- HD 117207 -- Star. SIMBAD. Retrieved on December 7, 2007.
- HD 117207b – Extra-solar Planet Candidate. SIMBAD. Retrieved on December 7, 2007.
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