| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Pictor |
| Right ascension | 05h04m 58.01433s[1] |
| Declination | −49° 34′ 40.2034″[1] |
| Apparent magnitude (V) | 5.02[2] |
| Characteristics | |
| Spectral type | K5 III[3] |
| U−B color index | +1.82[2] |
| B−V color index | +1.51[2] |
| Variable type | suspected[4] |
| Astrometry | |
| Radial velocity (Rv) | −5.0±7.4[5] km/s |
| Proper motion (μ) | RA: +68.538[1] mas/yr Dec.: −2.186[1] mas/yr |
| Parallax (π) | 7.8033 ± 0.1351 mas[1] |
| Distance | 418 ± 7 ly (128 ± 2 pc) |
| Absolute magnitude (MV) | −1.2[6] |
| Details | |
| Radius | 40.56+0.59 −2.38[1] R☉ |
| Luminosity | 362.6±7.4[1] L☉ |
| Temperature | 3,955+121 −28[1] K |
| Other designations | |
η2 Pic, NSV 1827, CD−49°1562, FK5 187, GC 6234, HD 33042, HIP 23649, HR 1663, SAO 217164[7] | |
| Database references | |
| SIMBAD | data |
η2 Pictoris, Latinised as Eta2 Pictoris, is a solitary[8] star in the southern constellationofPictor. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.02.[2] With an annual parallax shiftof7.8 mas as seen from the Earth,[1] 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.[6]
This is an evolved K-type giant star with a stellar classification of K5 III,[3] having exhausted the supply of hydrogen at its core, then cooled and expanded off the main sequence. At present it has 41[1] 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.[9] This is a member of the old disk population and is a suspected variable star.[10]
{{cite web}}: CS1 maint: postscript (link)
