HAT-P-13
HAT-P-13, also known as GSC 03416-00543, is a G-type main sequence star approximately 800 light-years away in the constellation Ursa Major. In 2009 it was discovered that this star is orbited by two massive planets, the innermost of which transits the star. This was the first known example of an extrasolar transiting planet with an additional planet in the same system.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Ursa Major |
| Right ascension | 08h 39m 31.8072s |
| Declination | +47° 21′ 07.274″ |
| Apparent magnitude (V) | 10.62 |
| Characteristics | |
| Spectral type | G4V |
| Variable type | Planetary transit |
| Astrometry | |
| Radial velocity (Rv) | 14.69 ± 0.68 km/s |
| Proper motion (μ) | RA: −24.060(16) mas/yr Dec.: −26.218(17) mas/yr |
| Parallax (π) | 4.0750 ± 0.0186 mas |
| Distance | 800 ± 4 ly (245 ± 1 pc) |
| Details | |
| Mass | 1.261+0.029 −0.023 M☉ |
| Radius | 1.73+0.10 −0.09 R☉ |
| Surface gravity (log g) | 4.13 ± 0.04 cgs |
| Temperature | 5720 ± 69 K |
| Metallicity [Fe/H] | 0.46 ± 0.07 dex |
| Rotational velocity (v sin i) | 3.1 ± 0.9 km/s |
| Age | 5 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
In 2015, a spectroscopic study have revealed a very strong starspot activity of the HAT-P-13 star.
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