HD 221287
| Observation data Epoch J2000 Equinox J2000 | |
|---|---|
| Constellation | Tucana |
| Right ascension | 23h 31m 20.33846s |
| Declination | −58° 12′ 35.0336″ |
| Apparent magnitude (V) | 7.82 |
| Characteristics | |
| Evolutionary stage | main sequence |
| Spectral type | F7V |
| B−V color index | 0.513±0.008 |
| Astrometry | |
| Radial velocity (Rv) | −21.91±0.13 km/s |
| Proper motion (μ) | RA: +181.041±0.018 mas/yr Dec.: −5.234±0.021 mas/yr |
| Parallax (π) | 17.8725±0.0206 mas |
| Distance | 182.5 ± 0.2 ly (55.95 ± 0.06 pc) |
| Absolute magnitude (MV) | 4.11 |
| Details | |
| Mass | 1.209+0.034 −0.038 M☉ |
| Radius | 1.183+0.020 −0.019 R☉ |
| Luminosity | 2.024±0.016 L☉ |
| Surface gravity (log g) | 4.374±0.013 cgs |
| Temperature | 6,431±16 K |
| Metallicity [Fe/H] | +0.13±0.149 dex |
| Rotation | 5±2 |
| Rotational velocity (v sin i) | 2.9±0.2 km/s |
| Age | 763+613 −474 or 1,300 Myr |
| Other designations | |
| Poerava, CD−58°8579, HD 221287, HIP 116084, SAO 247912, TYC 8838-463-1, 2MASS J23312032-5812350 | |
| Database references | |
| SIMBAD | data |
HD 221287, named Poerava, is a star in the southern constellation of Tucana. It has a yellow-white hue but is too faint to be viewed with the naked eye, having an apparent visual magnitude of 7.82. This object is located at a distance of 182 light years from the Sun, as determined from its parallax. It is drifting closer with a radial velocity of −22 km/s.