ι1 Muscae, Latinised as Iota1 Muscae, is a solitary[8] star in the southern constellation of Musca, near the southern constellation border with Chamaeleon. It is visible to the naked eye as a dim, orange-hued star with an apparent visual magnitude is 5.05.[2] The star is located around 222 light-years distant from the Sun based on parallax, and is drifting further away with a radial velocity of 27.5 km/s.[4]
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Musca |
| Right ascension | 13h 25m 07.11942s[1] |
| Declination | −74° 53′ 16.1512″[1] |
| Apparent magnitude (V) | 5.05[2] |
| Characteristics | |
| Spectral type | K0 III[3] |
| U−B color index | +1.01[2] |
| B−V color index | +1.11[2] |
| Astrometry | |
| Radial velocity (Rv) | 27.5±0.8[4] km/s |
| Proper motion (μ) | RA: −107.80[5] mas/yr Dec.: −132.25[5] mas/yr |
| Parallax (π) | 14.7839 ± 0.1205 mas[1] |
| Distance | 221 ± 2 ly (67.6 ± 0.6 pc) |
| Absolute magnitude (MV) | +0.88[6] |
| Details | |
| Radius | 11.78+0.22 −0.47[1] R☉ |
| Luminosity | 56.5±0.6[1] L☉ |
| Temperature | 4,610+96 −42[1] K |
| Other designations | |
| Database references | |
| SIMBAD | data |
This object is an aging giant star with a stellar classification of K0III;[3] a star that has used up its core hydrogen and is cooling and expanding. At present it has nearly 12[1] times the girth of the Sun. The star is radiating 56.5 times the luminosity of the Sun from its swollen photosphere at an effective temperature of about 4,610 K.[1]
References
edit- ^ a b c d e f g h 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.
- ^ a b c d Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99): 99, Bibcode:1966CoLPL...4...99J.
- ^ a b Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, vol. 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ^ a b de Bruijne, J. H. J.; Eilers, A.-C. (October 2012), "Radial velocities for the HIPPARCOS-Gaia Hundred-Thousand-Proper-Motion project", Astronomy & Astrophysics, 546: 14, arXiv:1208.3048, Bibcode:2012A&A...546A..61D, doi:10.1051/0004-6361/201219219, S2CID 59451347, A61.
- ^ a b van Leeuwen, F. (2007), "Validation of the new Hipparcos reduction", Astronomy and Astrophysics, 474 (2): 653–664, arXiv:0708.1752, Bibcode:2007A&A...474..653V, doi:10.1051/0004-6361:20078357, S2CID 18759600.
- ^ 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.
- ^ "iot02 Mus". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-09-11.
- ^ 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.