HAT-P-27
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 14h 51m 04.1870s |
| Declination | +05° 56′ 50.549″ |
| Apparent magnitude (V) | 12.214 |
| Characteristics | |
| Evolutionary stage | main-sequence star |
| Spectral type | G8 |
| Astrometry | |
| Radial velocity (Rv) | −16.74±0.56 km/s |
| Proper motion (μ) | RA: −28.610(19) mas/yr Dec.: −2.774(19) mas/yr |
| Parallax (π) | 4.9528±0.0169 mas |
| Distance | 659 ± 2 ly (201.9 ± 0.7 pc) |
| Orbit | |
| Primary | HAT-P-27 |
| Name | HAT-P-27 B |
| Semi-major axis (a) | 0.656±0.021" (131 AU) |
| Details | |
| Mass | 0.945±0.035 M☉ |
| Radius | 0.898+0.054 −0.039 R☉ |
| Luminosity | 0.57+0.09 −0.07 L☉ |
| Surface gravity (log g) | 4.51±0.04 cgs |
| Temperature | 5300±90 K |
| Metallicity [Fe/H] | 0.29±0.10 dex |
| Rotation | 0.4±0.4 |
| Rotational velocity (v sin i) | 0.6+0.7 −0.4 km/s |
| Age | 4.4+3.8 −2.6 Gyr |
| Other designations | |
| HAT-P-27, TOI-5672, TIC 461239485, WASP-40, GSC 00333-00351, 2MASS J14510418+0556505 | |
| Database references | |
| SIMBAD | data |
| Exoplanet Archive | data |
HAT-P-27, also known as WASP-40, is the primary of a binary star system about 659 light-years away. It is a G-type main-sequence star. The star's age is similar to the Sun's at 4.4 billion years. HAT-P-27 is enriched in heavy elements, having a 195% concentration of iron compared to the Sun.
A very dim stellar companion was detected in 2015 at a projected separation of 0.656″ and proven to be physically bound to the system in 2016.