HD 21693
HD 21693 is a star in the constellation Reticulum. It has an apparent visual magnitude of 7.94, therefore it is not visible to the naked eye. From its parallax measured by the Gaia spacecraft, it is located at a distance of 108.6 light-years (33.3 parsecs) from Earth.
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Reticulum |
| Right ascension | 03h 27m 12.482s |
| Declination | −58° 19′ 25.25″ |
| Apparent magnitude (V) | 7.94 |
| Characteristics | |
| Spectral type | G9IV-V |
| B−V color index | 0.775 |
| Astrometry | |
| Radial velocity (Rv) | 39.64±0.12 km/s |
| Proper motion (μ) | RA: 248.88 mas/yr Dec.: 94.75 mas/yr |
| Parallax (π) | 30.0199 ± 0.0339 mas |
| Distance | 108.6 ± 0.1 ly (33.31 ± 0.04 pc) |
| Absolute magnitude (MV) | 5.39 |
| Details | |
| Mass | 0.896±0.033 M☉ |
| Radius | 0.93 R☉ |
| Luminosity | 0.66 L☉ |
| Surface gravity (log g) | 4.37±0.04 cgs |
| Temperature | 5,430±26 K |
| Metallicity [Fe/H] | 0.00±0.02 dex |
| Rotation | 35.2±4.0 days |
| Rotational velocity (v sin i) | 1.6 km/s |
| Age | 6.8±4.4 Gyr |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is a G-type star with a spectral type of G9IV-V, with features intermediate between main sequence and subgiant. In 2011, the discovery of two Neptune-mass exoplanets around HD 21693 was announced.
This article is issued from Wikipedia. The text is licensed under Creative Commons - Attribution - Sharealike. Additional terms may apply for the media files.