Eta2 Pictoris
η2 Pictoris, Latinised as Eta2 Pictoris, is a solitary star in the southern constellation of Pictor. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.02. With an annual parallax shift of 7.8 mas as seen from the Earth, it is located around 418 light years from the Sun. It is a member of the HR 1614 moving group of stars that share a common motion through space.
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pictor |
| Right ascension | 05h 04m 58.01433s |
| Declination | −49° 34′ 40.2034″ |
| Apparent magnitude (V) | 5.02 |
| Characteristics | |
| Spectral type | K5 III |
| U−B color index | +1.82 |
| B−V color index | +1.51 |
| Variable type | suspected |
| Astrometry | |
| Radial velocity (Rv) | −5.0±7.4 km/s |
| Proper motion (μ) | RA: +68.538 mas/yr Dec.: −2.186 mas/yr |
| Parallax (π) | 7.8033 ± 0.1351 mas |
| Distance | 418 ± 7 ly (128 ± 2 pc) |
| Absolute magnitude (MV) | −1.2 |
| Details | |
| Radius | 40.56+0.59 −2.38 R☉ |
| Luminosity | 362.6±7.4 L☉ |
| Temperature | 3,955+121 −28 K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This is an evolved K-type giant star with a stellar classification of K5 III, having exhausted the supply of hydrogen at its core, then cooled and expanded off the main sequence. At present it has 41 times the girth of the Sun. It is radiating an estimated 363.5 times the Sun's luminosity from its photosphere at an effective temperature of 4,136 K. This is a member of the old disk population and is a suspected variable star.