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 | giant |
| 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 | |
| Database references | |
| SIMBAD | data |
References
edit- ^ a b c d e f g h i j k l m Vallenari, A.; et al. (Gaia collaboration) (2023). "Gaia Data Release 3. Summary of the content and survey properties". Astronomy and Astrophysics. 674: A1. arXiv:2208.00211. Bibcode:2023A&A...674A...1G. doi:10.1051/0004-6361/202243940. S2CID 244398875. Gaia DR3 record for this source at VizieR.
- ^ a b c Hoffleit, D.; Warren, Jr., W. H. (1991). The Bright Star Catalogue (5th Revised ed.). New Haven: Astronomical Data Center, NSSDC/ADC. Bibcode:1964cbs..book.....H.
- ^ Houk, Nancy; Smith-Moore, M. (1979). Michigan catalogue of two-dimensional spectral types for the HD stars. Vol. 3. Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan. Bibcode:1982mcts.book.....H.
- ^ Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015. S2CID 119257644.
- ^ De Medeiros, J. R.; Alves, S.; Udry, S.; Andersen, J.; Nordström, B.; Mayor, M. (January 2014). "A catalog of rotational and radial velocities for evolved stars: V. Southern stars⋆⋆⋆". Astronomy & Astrophysics. 561: A126. arXiv:1312.3474. Bibcode:2014A&A...561A.126D. doi:10.1051/0004-6361/201220762. ISSN 0004-6361.
- ^ "* eta03 For". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2023-09-28.
- ^ a b "η3 Fornacis (eta3 Fornacis)". The Sky Live. Retrieved 28 September 2023.
- ^ "Eta3 Fornacis Star Facts (Distance, Colour etc.)". Universe Guide. Retrieved 28 September 2023.
