HD 101930
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| Observation data Epoch 2000 |
|
|---|---|
| Constellation (pronunciation) |
Centaurus |
| Right ascension | 11h 43m 30.11s |
| Declination | -58 ° 0' 24.79" |
| Apparent magnitude (V) | 8.21 |
| Distance | 99.42 ly (30.50 pc) |
| Spectral type | K1V |
| Other designations | |
|
GJ 3683, CD-57°4096, HIP 57172,
SAO 239322, LTT 4350 |
|
HD 101930 is a dim 8th magnitude star in the constellation of Centaurus. It is an orange dwarf (spectral class K1 V), somewhat dimmer and cooler than our Sun.
In 2005 it was announced that a planet orbits the star.
[edit] HD 101930 b
| Orbital elements | ||
|---|---|---|
| Semi-major axis a: | 0.302 AU | |
| Eccentricity e: | 0.11 ± 0.02 | |
| Orbital period P: | 70.46 ± 0.18 d | |
| Inclination i: | ?° | |
| Angular distance θ: | 10 mas | |
| Longitude of periastron ω: |
251 ± 11° | |
| Time of periastron τ: | 2,453,145.0 ± 2.0 JD | |
| Semi-amplitude K: | 18.1 ± 0.4 m/s | |
| Physical characteristics | ||
| Mass: | >0.30 MJ | |
| Radius: | ? RJ | |
| Density: | ? kg/m³ | |
| Gravity: | ? g | |
| Temperature: | ? K | |
| Discovery | ||
| Discovery date: | 2005 | |
| Discovery site: | ||
| Detection method(s): | ||
| Discoverer(s): | Lovis, Mayor, Pepe et al. |
|
| Other catalogue | ||
HD 101930 b is an extrasolar planet orbiting the star. It has a minimum mass a third of Jupiter's, nearly the same as Saturn's so it is thought to be a gas giant. It orbits the star closer than Mercury, and the orbit is slightly eccentric.
[edit] References
- Lovis et al. (2005). "The HARPS search for southern extra-solar planets III. Three Saturn-mass planets around HD 93083, HD 101930 and HD 102117" (abstract). Astronomy and Astrophysics 437: 1121 – 1126. doi:.
[edit] External links
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