Gliese 176
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| Observation data Epoch J2000.0 |
|
|---|---|
| Constellation (pronunciation) |
Taurus |
| Right ascension | 04h 42m 55.8s |
| Declination | +18° 57' 29.4" |
| Apparent magnitude (V) | +9.97 |
| Distance | 30.7 ly (9.4 pc) |
| Spectral type | M2.5V |
| Other designations | |
|
HD 285968, HIP 21932
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Gliese 176 (HD 285968) is a red dwarf star half the mass of our Sun in the constellation Taurus. It has an apparent magnitude of +9.97 and it is 30.7 ly away.
[edit] Gliese 176 b
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.0727±0.0007 AU |
| Eccentricity | (e) | 0.23±0.13 |
| Orbital period | (P) | 10.2366±0.0038 d |
| Angular distance | (θ) | 7.734 mas |
| Longitude of periastron |
(ω) | 210.4±32.5° |
| Time of periastron | (T0) | 2,455,037.7979±1.1 JD |
| Semi-amplitude | (K) | 22.5 m/s |
| Physical characteristics | ||
| Mass | (m) | >0.0757±0.0096 MJ |
| Discovery information | ||
| Discovery date | 2007 | |
| Discoverer(s) | Endl et al. | |
| Detection method | radial velocity | |
| Discovery status | Published | |
Gliese 176 b (HD 285968 b) is a Neptune-mass exoplanet that orbits very close to its parent red dwarf star. The planet takes only 10 days to complete its orbit with 23% eccentricity.
[edit] External links
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