HAT-P-3 b
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| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | GSC 03466-00819[1] | |
| 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° |
| Angular distance | (θ) | 0.278 mas |
| Longitude 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/m3 |
| Surface gravity | (g) | 12.3[citation needed] m/s² (1.25[citation needed] g) |
| Temperature | (T) | ? K |
| Discovery information | ||
| Discovery date | 2007 | |
| Discoverer(s) | HATNet Project | |
| Detection method | Transit | |
| Discovery status | Published | |
HAT-P-3 b is an extrasolar planet 457 light years from Earth. 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 149026 b.[1]
[edit] References
- ^ a b c d e f Torres, G.; G. A. Bakos, G. Kovacs, D. W. Latham, J. M. Fernandez, R. W. Noyes, G. A. Esquerdo, A. Sozzetti, D. A. Fischer, R. P. Butler, G. W. Marcy, R. P. Stefanik, D. D. Sasselov, J. Lazar, I. Papp, P. Sari (2007). "HAT-P-3 b: A heavy-element rich planet transiting a K dwarf star". ApJL. arXiv:0707.4268v1.
