K2-32
Yellowish-hued star in the constellation Ophiuchus / From Wikipedia, the free encyclopedia
K2-32 is a G9-type main sequence star slightly smaller and less massive than the sun.[4] Four confirmed transiting exoplanets are known to orbit this star.[9] 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.[10]
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
---|---|
Constellation | Ophiuchus[1] |
Right ascension | 16h 49m 42.2602s[2] |
Declination | −19° 32′ 34.151″[2] |
Apparent magnitude (V) | 12.31±0.02[3] |
Characteristics | |
Spectral type | G9V[4] |
Apparent magnitude (J) | 10.404±0.024[5] |
Apparent magnitude (H) | 9.993±0.025[5] |
Apparent magnitude (K) | 9.821±0.019[5] |
Variable type | Planetary transit variable[6] |
Astrometry | |
Radial velocity (Rv) | −1.82±0.14[7] km/s |
Proper motion (μ) | RA: −16.662(18)[2] mas/yr Dec.: −53.564(13)[2] mas/yr |
Parallax (π) | 6.3939 ± 0.0153 mas[2] |
Distance | 510 ± 1 ly (156.4 ± 0.4 pc) |
Details[3] | |
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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