K2-19
K2-19 is an early K-type or late G-type main sequence star that is magnetically active, and has a light curve that exhibits variations in brightness of ~1%. It is located approximately 976 light-years away in the constellation Virgo. Three confirmed transiting exoplanets are known to orbit this star.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 11h 39m 50.4803s |
| Declination | +00° 36′ 12.875″ |
| Apparent magnitude (V) | 13.002±0.009 |
| Characteristics | |
| Spectral type | K0 V or G9V |
| Apparent magnitude (J) | 11.596±0.024 |
| Apparent magnitude (H) | 11.208±0.022 |
| Apparent magnitude (K) | 11.161±0.026 |
| Apparent magnitude (B) | 13.798±0.020 |
| Variable type | Planetary transit variable |
| Astrometry | |
| Radial velocity (Rv) | −7.2296±0.0080 km/s |
| Proper motion (μ) | RA: −18.673(22) mas/yr Dec.: 4.571(15) mas/yr |
| Parallax (π) | 3.3410 ± 0.0196 mas |
| Distance | 976 ± 6 ly (299 ± 2 pc) |
| Details | |
| 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 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.