HAT-P-9b
| Exoplanet | List of exoplanets | |
|---|---|---|
 | ||
| Parent star | ||
| Star | HAT-P-9 | |
| Constellation | Auriga | |
| Right ascension | (α) | 07h 20m 40.479s |
| Declination | (δ) | +37° 08′ 26.17″ |
| Distance | 1560 ± 190 ly (480 ± 60 pc) | |
| Spectral type | F | |
| Orbital elements | ||
| Semi-major axis | (a) | 0.0528 ± 0.002 AU |
| Periastron | (q) | 0.0527 AU |
| Apastron | (Q) | 0.0529 AU |
| Eccentricity | (e) | ~0.0012 |
| Orbital period | (P) | 3.92289 ± 0.00004 d (0.0107401 y) |
| Time of transit | (Tt) | 2454417.9077 ± 0.0003 JD |
| Physical characteristics | ||
| Mass | (m) | 0.78 ± 0.09 MJ (250 M⊕) |
| Radius | (r) | 1.4 ± 0.06 RJ (15 R⊕) (96 Mm) |
| Density | (ρ) | 380 kg m−3 |
| Surface gravity | (g) | 10.3 m/s² (1.05 g) |
| Discovery information | ||
| Discovery date | June 26, 2008 | |
| Discoverer(s) | Shporer et al. | |
| Discovery method | Transit (SuperWASP) | |
| Discovery site | Cambridge, Massachusetts | |
| Discovery status | Published | |
| Database references | ||
| Extrasolar Planets Encyclopaedia | data | |
| SIMBAD | data | |
| Exoplanet Archive | data | |
| Open Exoplanet Catalogue | data | |
HAT-P-9b is an exoplanet approximately 1560 light years away in the constellation Auriga. This planet was found by the transit method on June 26, 2008. It has a mass 78% that of Jupiter and a radius 140% that of Jupiter. As with most transiting planets, this planet is a hot Jupiter, meaning this Jupiter-like planet orbits extremely close to its parent star, taking only 3.92 days to orbit.[1]
References
- ↑ Shporer, Avi; et al. (2009). "HAT-P-9b: A Low-Density Planet Transiting a Moderately Faint F Star". The Astrophysical Journal. 690 (2): 1393–1400. arXiv:0806.4008
. Bibcode:2009ApJ...690.1393S. doi:10.1088/0004-637X/690/2/1393.
External links
Media related to HAT-P-9b at Wikimedia Commons
Coordinates: 
07h 20m 40.479s, +37° 08′ 26.17″
This article is issued from Wikipedia - version of the 1/8/2016. The text is available under the Creative Commons Attribution/Share Alike but additional terms may apply for the media files.