Qatar-2
Qatar-2 is a K-type main-sequence star about 595 light-years away in the constellation of Virgo. The star is much older than Sun, and has a concentration of heavy elements similar to solar abundance. The star features a numerous and long-lived starspots, and belongs to a peculiar variety of inflated K-dwarfs with strong magnetic activity inhibiting internal convection.
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Virgo |
| Right ascension | 13h 50m 37.4100s |
| Declination | −06° 48′ 14.4199″ |
| Apparent magnitude (V) | 13.3 |
| Characteristics | |
| Spectral type | K5V |
| Astrometry | |
| Radial velocity (Rv) | -23.55 km/s |
| Proper motion (μ) | RA: -88.184 mas/yr Dec.: -15.290 mas/yr |
| Parallax (π) | 5.4849 ± 0.0365 mas |
| Distance | 595 ± 4 ly (182 ± 1 pc) |
| Details | |
| Mass | 0.727±0.024 M☉ |
| Radius | 0.7033±0.0080 R☉ |
| Surface gravity (log g) | 4.601±0.018 cgs |
| Temperature | 4645±50 K |
| Metallicity [Fe/H] | 0.13±0.1 dex |
| Rotation | 18.0±0.2 |
| Rotational velocity (v sin i) | 2.0±0.2 km/s |
| Age | 9 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
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