HD 56618
  | |
| Observation data Epoch J2000.0 Equinox ICRS | |
|---|---|
| Constellation | Canis Major |
| Right ascension | 07h 16m 34.99315s |
| Declination | −27° 52′ 52.2453″ |
| Apparent magnitude (V) | 4.66 |
| Characteristics | |
| Evolutionary stage | AGB |
| Spectral type | M2III |
| B−V color index | 1.589±0.028 |
| Astrometry | |
| Radial velocity (Rv) | +41.5±2.8 km/s |
| Proper motion (μ) | RA: −13.479 mas/yr Dec.: +38.625 mas/yr |
| Parallax (π) | 8.3189±0.2874 mas |
| Distance | 390 ± 10 ly (120 ± 4 pc) |
| Absolute magnitude (MV) | −0.80 |
| Details | |
| Mass | 1.5 M☉ |
| Radius | 61.1+7.3 −6.9 R☉ |
| Luminosity | 699.7±27.3 L☉ |
| Surface gravity (log g) | 1.35 cgs |
| Temperature | 3,797+233 −209 K |
| Metallicity [Fe/H] | −0.24 dex |
| Other designations | |
| CD−27°3852, FK5 2562, HD 56618, HIP 35205, HR 2766, SAO 173360 | |
| Database references | |
| SIMBAD | data |
HD 56618 is a single star in the southern constellation of Canis Major. It is a red-hued star that is faintly visible to the naked eye with an apparent visual magnitude of 4.66. This object is located at a distance of approximately 390 light years from the Sun based on parallax measurements. It is drifting further away with a radial velocity of +41.5 km/s, having come to within 203 light-years some 2.2 million years ago. Olin J. Eggen listed it as a probable member of the Hyades supercluster.
This is an aging red giant star currently on the asymptotic giant branch with a stellar classification of M2III. It is no longer undergoing core hydrogen fusion and has expanded to 61 times the radius of the Sun. The star is radiating 700 times the luminosity of the Sun from its enlarged photosphere at an effective temperature of 3,797 K.
References
- 1 2 3 4 5 6 7 8 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. XHIP record for this object at VizieR.
- 1 2 3 4 5 6 7 8 9 10 11 Brown, A. G. A.; et al. (Gaia collaboration) (August 2018). "Gaia Data Release 2: Summary of the contents and survey properties". Astronomy & Astrophysics. 616. A1. arXiv:1804.09365. Bibcode:2018A&A...616A...1G. doi:10.1051/0004-6361/201833051. Gaia DR2 record for this source at VizieR.
- 1 2 Eggen, Olin J. (July 1992), "Asymptotic giant branch stars near the sun", Astronomical Journal, 104 (1): 275–313, Bibcode:1992AJ....104..275E, doi:10.1086/116239.
- 1 2 Houk, Nancy (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.
- 1 2 3 Khalatyan, A.; Anders, F.; Chiappini, C.; Queiroz, A. B. A.; Nepal, S.; Dal Ponte, M.; Jordi, C.; Guiglion, G.; Valentini, M.; Torralba Elipe, G.; Steinmetz, M.; Pantaleoni-González, M.; Malhotra, S.; Jiménez-Arranz, Ó.; Enke, H.; Casamiquela, L.; Ardèvol, J. (2024), "Transferring spectroscopic stellar labels to 217 million Gaia DR3 XP stars with SHBoost", Astronomy and Astrophysics, 691: A98, arXiv:2407.06963, Bibcode:2024A&A...691A..98K, doi:10.1051/0004-6361/202451427.
- ↑ "HD 56618". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2020-01-17.
- ↑ Eggleton, P. P.; Tokovinin, A. A. (September 2008), "A catalogue of multiplicity among bright stellar systems", Monthly Notices of the Royal Astronomical Society, 389 (2): 869–879, arXiv:0806.2878, Bibcode:2008MNRAS.389..869E, doi:10.1111/j.1365-2966.2008.13596.x, S2CID 14878976.
- ↑ Eggen, O. J. (February 1985), "A systematic search for members of the Hyades supercluster. V. The red giants.", Astronomical Journal, 90: 333–340, Bibcode:1985AJ.....90..333E, doi:10.1086/113736
