| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HAT-P-13 | |
| Constellation | Ursa Major | |
| Right ascension | (α) | 08h 39m 32s |
| Declination | (δ) | +47° 21′ 07″ |
| Apparent magnitude | (mV) | 10.62 |
| Distance | 697 ± 39 ly (214 ± 12 pc) |
|
| Spectral type | G4 | |
| Orbital elements | ||
| Semimajor axis | (a) | 1.186+0.018 −0.033 AU |
| Periastron | (q) | 0.366 AU |
| Apastron | (Q) | 2.006 AU |
| Eccentricity | (e) | 0.691 ± 0.018 |
| Orbital period | (P) | 428.5 ± 3 d (1.173 ± 0.008 y) |
| Argument of periastron |
(ω) | 176.7 ± 0.5° |
| Time of periastron | (T0) | 2454890.05 ± 0.48 JD |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 15.2 ± 1 MJ |
| Discovery information | ||
| Discovery date | 21 July 2009 | |
| Discoverer(s) | Bakos et al. | |
| Detection method | Radial velocity | |
| Discovery site | United States | |
| Discovery status | Confirmed | |
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HAT-P-13c is a substellar object orbiting the star HAT-P-13 located 698 light years away from Earth in the constellation of Ursa Major. With a mass at least 15.2 times that of Jupiter, it may be a massive planet or a small brown dwarf.[1] The gravitational effect of this object on the inner transiting planet HAT-P-13b may allow a precise determination of the inner planet's internal structure.[2]