Eta3 Fornacis
Star in the constellation Fornax
From Wikipedia, the free encyclopedia
Eta3 Fornacis (η3 Fornacis) is an orange giant in the constellation of Fornax. The star has a spectral type of K2III and an apparent magnitude of 5.47.[7] The star is visually close to, but unrelated with the similar stars η2 Fornacis and η1 Fornacis.[7] The star is located at approximately 489 light years away with a luminosity of about 249 L☉, and is a suspected binary system with the primary being the orange giant.[8]
 | |
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Fornax |
| Right ascension | 02h 50m 40.407s[1] |
| Declination | −35° 40′ 33.06″[1] |
| Apparent magnitude (V) | 5.47[2] |
| Characteristics | |
| Evolutionary stage | red giant branch[1] |
| Spectral type | K2III[3] |
| U−B color index | +1.31[2] |
| B−V color index | +1.25[2] |
| Astrometry | |
| Radial velocity (Rv) | 13.10±0.12[1] km/s |
| Proper motion (μ) | RA: +4.093[1] mas/yr Dec.: −54.551[1] mas/yr |
| Parallax (π) | 6.6631±0.0580 mas[1] |
| Distance | 489 ± 4 ly (150 ± 1 pc) |
| Absolute magnitude (MV) | −0.26[4] |
| Details | |
| Mass | 3.7[1] M☉ |
| Radius | 21.9[1] R☉ |
| Luminosity | 249[1] L☉ |
| Surface gravity (log g) | 2.27[1] cgs |
| Temperature | 4,717[1] K |
| Metallicity [Fe/H] | 0.156[1] dex |
| Rotational velocity (v sin i) | <1[5] km/s |
| Age | 217[1] Myr |
| Other designations | |
| η3 For, CD−36°1070, HD 17829, HIP 13265, HR 848, SAO 193944[6] | |
| Database references | |
| SIMBAD | data |
