Eta2 Doradus
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
| Constellation | Dorado |
| Right ascension | 06h 11m 14.98s |
| Declination | −65° 35′ 21.9″ |
| Apparent magnitude (V) | 5.01 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M2.5III |
| B−V color index | 1.599 |
| Astrometry | |
| Radial velocity (Rv) | +34.5±0.8 km/s |
| Proper motion (μ) | RA: −23.823 mas/yr Dec.: +118.639 mas/yr |
| Parallax (π) | 5.6046±0.1562 mas |
| Distance | 580 ± 20 ly (178 ± 5 pc) |
| Absolute magnitude (MV) | −1.45 |
| Details | |
| Mass | 1.4 M☉ |
| Radius | 81.89 R☉ |
| Luminosity | 1,165 L☉ |
| Surface gravity (log g) | 1.61 cgs |
| Temperature | 3,726+313 −154 K |
| Metallicity [Fe/H] | −0.13 dex |
| Other designations | |
| η2 Dor, CPD−65°561, FK5 2473, GC 7946, HD 43455, HIP 29353, HR 2245, SAO 249469, PPM 355229, TYC 8901-1098-1 | |
| Database references | |
| SIMBAD | data |
Eta2 Doradus, Latinized from η2 Doradus, is a star in the southern constellation of Dorado. It is visible to the naked eye as a dim, reddish star with an apparent visual magnitude of 5.01 It is about 580 light years from the Sun as shown by parallax, and its net movement is one of receding, having a radial velocity of +34.5 km/s. It is circumpolar south of latitude 24° 24′ S.
This object is an M-type giant star, with its stellar classification being M2.5III. It has left the main sequence after exhausting its core hydrogen and expanded to around 80 R☉. The star is radiating about 1,200 times the Sun's luminosity from its photosphere, at an effective temperature of 3,726 K.