K2-32
K2-32 is a G9-type main sequence star slightly smaller and less massive than the sun. Four confirmed transiting exoplanets are known to orbit this star. A study of atmospheric escape from the planet K2-32b caused by high-energy stellar irradiation indicates that the star has always been a very slow rotator.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Ophiuchus |
| Right ascension | 16h 49m 42.2602s |
| Declination | −19° 32′ 34.151″ |
| Apparent magnitude (V) | 12.31±0.02 |
| Characteristics | |
| Spectral type | G9V |
| Apparent magnitude (J) | 10.404±0.024 |
| Apparent magnitude (H) | 9.993±0.025 |
| Apparent magnitude (K) | 9.821±0.019 |
| Variable type | Planetary transit variable |
| Astrometry | |
| Radial velocity (Rv) | −1.82±0.14 km/s |
| Proper motion (μ) | RA: −16.662(18) mas/yr Dec.: −53.564(13) mas/yr |
| Parallax (π) | 6.3939 ± 0.0153 mas |
| Distance | 510 ± 1 ly (156.4 ± 0.4 pc) |
| Details | |
| Mass | 0.856±0.028 M☉ |
| Radius | 0.845+0.044 −0.035 R☉ |
| Surface gravity (log g) | 4.49±0.05 cgs |
| Temperature | 5275±60 K |
| Metallicity [Fe/H] | −0.02±0.04 dex |
| Rotational velocity (v sin i) | 0.7 km/s |
| Age | 7.9±4.5 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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