BD-10°3166
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| Observation data Epoch 2000 |
|
|---|---|
| Constellation | Crater |
| Right ascension | 10h 58m 28.78s |
| Declination | −10° 46′ 13.39″ |
| Apparent magnitude (V) | 10.00 |
| Distance | 218 ± 32.6 ly (66.8 ± 10.0 pc) |
| Spectral type | G4V |
| Other designations | |
|
GSC 05503-00946
|
|
BD-10°3166 is a dim 10th magnitude star in the constellation of Crater. Like the Sun, it is a yellow dwarf, but is slightly more massive (spectral type G4 V; some sources give unlikely type K0 V). It was inconspicuous enough not be included in the Henry Draper (HD) catalogue. The Hipparcos satellite also did not study it, so its true distance is poorly known. A recent photometric distance measurement gives an approximate distance of 220 light years. Although the estimate is only crude, it is probably good enought to exclude a suggested companion star, LP 731-076, being its true binary star companion. [1]
The star is very enriched with metals, being about three times as metal-rich as the Sun. Planets are common around such stars, and BD-10°3166 is not an exception. In 2000, the California and Carnegie Planet Search team discovered an extrasolar planet[2]orbiting the star.
[edit] BD-10°3166 b
| Extrasolar planet | Lists of extrasolar planets | |
|---|---|---|
| Orbital elements | ||
| Semimajor axis | (a) | 0.0452±0.0026 AU |
| Eccentricity | (e) | 0.019±0.023 |
| Orbital period | (P) | 3.48777±0.00011 d |
| Inclination | (i) | ?° |
| Longitude of periastron |
(ω) | 334° |
| Time of periastron | (τ) | 2,451,171.22±0.69 JD |
| Physical characteristics | ||
| Mass | (m) | >0.458±0.039 MJ |
| Radius | (r) | ? RJ |
| Density | (ρ) | ? kg/m3 |
| Temperature | (T) | ? K |
| Discovery information | ||
| Discovery date | 2000 | |
| Discoverer(s) | Butler, Vogt, Marcy et al. |
|
| Detection method | Radial velocity | |
| Discovery status | Confirmed | |
BD-10°3166 b is a so-called "hot Jupiter", a planet that orbits its parent star in a very close orbit. Distance to the star is less than 1/20th Earth's distance from the Sun. No transits by the planet have been detected, so the planet's orbital plane cannot be exactly aligned with our direction of view.
[edit] References
- ^ Deepak Raghavan, Todd J. Henry, Brian D. Mason, John P. Subasavage, Wei-Chun Jao, Thom D. Beaulieu, Nigel C. Hambly (2006). "Two Suns in The Sky: Stellar Multiplicity in Exoplanet Systems". The Astrophysical Journal, accepted.
- ^ Butler et al. (2000). "Planetary Companions to the Metal-rich Stars BD -10°3166 and HD 52265". The Astrophysical Journal 545: 504-511.
- ^ Butler, R. et al. (2006). "Catalog of Nearby Exoplanets". The Astrophysical Journal 646: 505 – 522. (web Preprint)
[edit] External links
- SIMBAD star entry planet entry
- The Extrasolar Planets Encyclopaedia entry
- BD-10º3166 at Extrasolar Visions
- BD-10º3166 b at Extrasolar Visions
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