HAT-P-3b
From Wikipedia, the free encyclopedia
| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
 |
||
| Parent star | ||
| Star | HAT-P-3 | |
| Constellation | Ursa Major | |
| Right ascension | (α) | 13h 44m 23s |
| Declination | (δ) | +48° 01′ 43″ |
| Distance | 457 ± 42 ly (140 ± 13 pc) |
|
| Spectral type | K[1] | |
| Orbital elements | ||
| Semimajor axis | (a) | 0.03894 AU |
| Eccentricity | (e) | 0 |
| Orbital period | (P) | 2.899703 d |
| Inclination | (i) | 87.24° |
| Argument of periastron |
(ω) | ?° |
| Time of periastron | (T0) | 2454218.7598 ± 0.0029 JD |
| Semi-amplitude | (K) | 89.1 ± 2.0 m/s |
| Physical characteristics | ||
| Mass | (m) | 0.599 ± 0.026[1] MJ |
| Radius | (r) | 0.890 ± 0.046[1] RJ |
| Density | (ρ) | 1060 ± 170[1] kg m-3 |
| Surface gravity | (g) | 12.3 m/s² (1.25 g) |
| Discovery information | ||
| Discovery date | 28 July 2007 | |
| Discoverer(s) | HATNet Project | |
| Detection method | Transit | |
| Discovery status | Published | |
HAT-P-3b is an extrasolar planet that orbits the star HAT-P-3 approximately 457 light-years away in the constellation of Ursa Major. It was discovered by the HATNet Project via the transit method, so both its mass and radius are known quite precisely; based on these figures it is predicted that the planet has about 75 Earth masses worth of heavy elements in its core, making it similar to the planet HD 149026b.[1]
[edit] See also
[edit] References
- ^ a b c d e Torres et al (2007). "HAT-P-3b: A Heavy-Element-rich Planet Transiting a K Dwarf Star". The Astrophysical Journal Letters 666 (2): L121–L124. Bibcode 2007ApJ...666L.121T. doi:10.1086/521792. http://www.iop.org/EJ/abstract/1538-4357/666/2/L121/. (web Preprint)
[edit] External links
Media related to HAT-P-3b at Wikimedia Commons
- "Notes for planet HAT-P-3 b". The Extrasolar Planets Encyclopaedia. http://exoplanet.eu/planet.php?p1=HAT-P-3&p2=b. Retrieved 2008-07-02.
