// Workers AI · dad joke modeWhat did Mu2 Chamaeleontis say? I'm a star change-ing slowly.
| Observation data Epoch J2000 Equinox ICRS | |
|---|---|
| Constellation | Chamaeleon[1] |
| Right ascension | 10h 04m 07.14960s[2] |
| Declination | −81° 33′ 55.7280″[2] |
| Apparent magnitude (V) | 6.60[1] |
| Characteristics | |
| Spectral type | G6/8 III[3] |
| U−B color index | +0.53[4] |
| B−V color index | +0.919±0.002[1] |
| Variable type | Suspected[5] |
| Astrometry | |
| Radial velocity (Rv) | +3.30±1.65[2] km/s |
| Proper motion (μ) | RA: −47.094[2] mas/yr Dec.: 49.541[2] mas/yr |
| Parallax (π) | 5.8632±0.0583 mas[2] |
| Distance | 556 ± 6 ly (171 ± 2 pc) |
| Absolute magnitude (MV) | 0.59[1] |
| Details | |
| Radius | 11.35+0.32 −0.16[2] R☉ |
| Luminosity | 70.6±0.9[2] L☉ |
| Surface gravity (log g) | 2.86±0.07[6] cgs |
| Temperature | 4,967+36 −69[2] K |
| Metallicity [Fe/H] | −0.39±0.05[6] dex |
| Rotational velocity (v sin i) | 3.86±0.46[6] km/s |
| Other designations | |
| NSV 4744, CD−80°365, GC 13909, HD 88351, HIP 49326, HR 3997, SAO 258561[7] | |
| Database references | |
| SIMBAD | data |
Mu2 Chamaeleontis is a star in the southern constellation of Chamaeleon. Its name is a Bayer designation that is Latinized from μ2 Chamaeleontis, and abbreviated Mu2 Cha or μ2 Cha. This star is not bright enough to be readily visible to the naked eye, having an apparent visual magnitude of 6.60, but has an absolute magnitude of 0.59.[1] The distance to this object is approximately 556 light years, based on the star's parallax.[2] The star's radial velocity is poorly constrained, but it appears to be drifting further away at the rate of around +3 km/s.[2]
This object is an aging G-type giant star with a stellar classification of G6/8 III.[3] Having exhausted the supply of hydrogen at its core, the star has cooled and expanded until now it has 11 times the girth of the Sun.[2] It is a suspected variable star of unknown type.[5] The star is radiating 71 times the luminosity of the Sun from its swollen photosphere at an effective temperature of 4,967 K.[2]
References
[edit]- 1 2 3 4 5 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 12 13 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 Houk, N.; Cowley, A. P. (1975). University of Michigan Catalogue of two-dimensional spectral types for the HD stars. Vol. 1. Bibcode:1975mcts.book.....H.
- ↑ Johnson, H. L. (1966). "UBVRIJKL Photometry of the Bright Stars". Communications of the Lunar and Planetary Laboratory. 4: 99. Bibcode:1966CoLPL...4...99J.
- 1 2 Samus, N. N.; et al. (2017), "General Catalogue of Variable Stars", Astronomy Reports, GCVS 5.1, 61 (1): 80–88, Bibcode:2017ARep...61...80S, doi:10.1134/S1063772917010085, S2CID 125853869.
- 1 2 3 Perdelwitz, V.; et al. (March 2024). "Analysis of the public HARPS/ESO spectroscopic archive - Ca II H&K time series for the HARPS radial velocity database". Astronomy & Astrophysics. 683: A125. arXiv:2311.12438. Bibcode:2024A&A...683A.125P. doi:10.1051/0004-6361/202348263. ISSN 0004-6361.
- ↑ "HD 88351". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 19 August 2017.
