| Extrasolar planet | List of extrasolar planets | |
|---|---|---|
| Parent star | ||
| Star | HD 13931 | |
| Constellation | Andromeda | |
| Right ascension | (α) | 02h 16m 47.3791s |
| Declination | (δ) | +43° 46′ 22.784″ |
| Distance | 144.2 ± 4.6 ly (44.2 ± 1.4 pc) |
|
| Spectral type | G0 | |
| Mass | (m) | 1.02 ± 0.02 M☉ |
| Radius | (r) | 1.23 ± 0.06 R☉ |
| Temperature | (T) | 5829 ± 44 K |
| Metallicity | [Fe/H] | 0.03 ± 0.04 |
| Age | 8.4 ± 2.0 Gyr | |
| Orbital elements | ||
| Semimajor axis | (a) | 5.15 ± 0.29 AU (~770 Gm) |
| ~116 mas | ||
| Periastron | (q) | 5.05 ± 0.43 AU (~756 Gm) |
| Apastron | (Q) | 5.25 ± 0.46 AU (~785 Gm) |
| Eccentricity | (e) | 0.02 ± 0.05 |
| Orbital period | (P) | 4218 ± 388 d (~11.55 y) |
| Orbital speed | (υ) | 13.3 ± 2.2 km/s |
| Argument of periastron |
(ω) | 290 ± 78° |
| Time of periastron | (T0) | 24494 ± 904 JD |
| Semi-amplitude | (K) | 22.8 ± 3.0 m/s |
| Physical characteristics | ||
| Minimum mass | (m sin i) | 1.88 ± 0.15 MJ |
| Discovery information | ||
| Discovery date | November 13, 2009 | |
| Discoverer(s) | Howard et al. | |
| Detection method | Radial velocity | |
| Discovery site | Keck Observatory | |
| Discovery status | Submitted | |
| Other designations | ||
| Database references | ||
| Extrasolar Planets Encyclopaedia |
data | |
| SIMBAD | data | |
HD 13931 b (also known as HIP 10626 b) is an extrasolar planet which orbits the G-type star HD 13931, located approximately 144 light years away in the constellation Andromeda. This planet takes 11.55 years to orbit the star at the average distance of 5.15 AU or 770 Gm. The planet’s eccentricity (0.02) is about the same as Earth. The orbital distance for this planet ranges from 5.05 to 5.25 AU. This planet was discovered by using radial velocity method from spectrograph taken at Keck Observatory on November 13, 2009.
Other planets that were discovered or confirmed on November 13, 2009: