K2-19
Orangish-hued star in the constellation Virgo / From Wikipedia, the free encyclopedia
K2-19 is an early K-type[4] or late G-type main sequence star[5] that is magnetically active, and has a light curve that exhibits variations in brightness of ~1%.[5] It is located approximately 976 light-years away in the constellation Virgo. Three confirmed transiting exoplanets are known to orbit this star.
Quick Facts Observation data Epoch J2000 Equinox J2000, Constellation ...
Observation data Epoch J2000 Equinox J2000 | |
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Constellation | Virgo[1] |
Right ascension | 11h 39m 50.4803s[2] |
Declination | +00° 36′ 12.875″[2] |
Apparent magnitude (V) | 13.002±0.009[3] |
Characteristics | |
Spectral type | K0 V[4] or G9V[5] |
Apparent magnitude (J) | 11.596±0.024[6] |
Apparent magnitude (H) | 11.208±0.022[6] |
Apparent magnitude (K) | 11.161±0.026[6] |
Apparent magnitude (B) | 13.798±0.020[3] |
Variable type | Planetary transit variable[7] |
Astrometry | |
Radial velocity (Rv) | −7.2296±0.0080[8] km/s |
Proper motion (μ) | RA: −18.673(22)[2] mas/yr Dec.: 4.571(15)[2] mas/yr |
Parallax (π) | 3.3410 ± 0.0196 mas[2] |
Distance | 976 ± 6 ly (299 ± 2 pc) |
Details[4] | |
Mass | 0.918±0.064 M☉ |
Radius | 0.881±0.111 R☉ |
Surface gravity (log g) | 4.50±0.10 cgs |
Temperature | 5250±70 K |
Metallicity [Fe/H] | 0.10±0.05 dex |
Rotation | 20.54±0.30 d |
Rotational velocity (v sin i) | 3.00±0.50 km/s |
Age | ≥8[9] Gyr |
Other designations | |
Database references | |
SIMBAD | data |
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