Zeta1 Muscae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Musca[1] |
| Right ascension | 12h 22m 12.02893s[2] |
| Declination | −68° 18′ 26.4093″[2] |
| Apparent magnitude (V) | 5.73[1] |
| Characteristics | |
| Evolutionary stage | red giant branch[2] |
| Spectral type | K0III[3] |
| B−V color index | +1.038±0.004[1] |
| Astrometry | |
| Radial velocity (Rv) | +21.13±0.40[1] km/s |
| Proper motion (μ) | RA: −1.467[2] mas/yr Dec.: −47.437[2] mas/yr |
| Parallax (π) | 9.1234±0.2059 mas[2] |
| Distance | 357 ± 8 ly (110 ± 2 pc) |
| Absolute magnitude (MV) | 0.73[1] |
| Details | |
| Mass | 2.8[2] M☉ |
| Radius | 14[2] R☉ |
| Luminosity | 82[2] L☉ |
| Surface gravity (log g) | 2.53[2] cgs |
| Temperature | 4.998[2] K |
| Metallicity [Fe/H] | −0.21[4] dex |
| Rotational velocity (v sin i) | 3.92[4] km/s |
| Age | 456[2] Myr |
| Other designations | |
| ζ1 Mus, CPD−67°1939, HD 107567, HIP 60329, HR 4704, SAO 251868[5] | |
| Database references | |
| SIMBAD | data |
Zeta1 Muscae, Latinized from ζ1 Muscae and abbreviated ζ1 Mus, is a suspected astrometric binary[6] star system in the constellation Musca, located 2.6° west of Beta Muscae.[7] It is bright enough to be visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude of 5.73,[1] forming a visual pair with nearby Zeta2 Muscae.[7] The ζ1 Mus system is around 417 light-years distant from the Sun, based on parallax, and is drifting further away with a radial velocity of +21 km/s.[1]
The suspected astrometric component of the ζ1 Mus system was identified from acceleration behavior in the proper motion of the main star.[8] The visible component is an aging giant star with a stellar classification of K0III;[5] a star that has used up its core hydrogen and is cooling and expanding. It now has 14 times the girth of the Sun and is radiating 82 times the Sun's luminosity from its swollen photosphere at an effective temperature of 4,998 K.[2]
References
[edit]- ^ a b c d e f g 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.
- ^ 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.
- ^ Houk, Nancy (1978), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor: Dept. of Astronomy, University of Michigan, Bibcode:1975mcts.book.....H.
- ^ a b {{cite journal |bibcode=2024A&A...683A.125P |title=Analysis of the public HARPS/ESO spectroscopic archive. Ca II H&K time series for the HARPS radial velocity database |last1=Perdelwitz |first1=V. |last2=Trifonov |first2=T. |last3=Teklu |first3=J. T. |last4=Sreenivas |first4=K. R. |last5=Tal-Or |first5=L. |journal=Astronomy and Astrophysics |date=2024 |volume=683 |doi=10.1051/0004-6361/202348263 |arxiv=2311.12438 }
- ^ a b "zet01 mus". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-20.
- ^ 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.
- ^ a b Streicher, M. (April 2006), "Musca, the Heavenly Fly", Monthly Notes of the Astronomical Society of South Africa, 65 (3 and 4): 56–59, Bibcode:2006MNSSA..65...56S.
- ^ Makarov, V. V.; Kaplan, G. H. (May 2005), "Statistical Constraints for Astrometric Binaries with Nonlinear Motion", The Astronomical Journal, 129 (5): 2420–2427, Bibcode:2005AJ....129.2420M, doi:10.1086/429590.
