Mu Mensae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Mensa |
| Right ascension | 04h 43m 03.96347s[1] |
| Declination | −70° 55′ 51.6976″[1] |
| Apparent magnitude (V) | 5.54[2] |
| Characteristics | |
| Spectral type | B8 II-III(p Si)[3] |
| U−B color index | −0.46[2] |
| B−V color index | −0.12[2] |
| Astrometry | |
| Radial velocity (Rv) | −0.2±3.9[4] km/s |
| Proper motion (μ) | RA: +9.32[1] mas/yr Dec.: +34.93[1] mas/yr |
| Parallax (π) | 6.64 ± 0.23[1] mas |
| Distance | 490 ± 20 ly (151 ± 5 pc) |
| Absolute magnitude (MV) | 0.02[5] |
| Details | |
| Radius | 3.3[6] R☉ |
| Luminosity | 216[7] L☉ |
| Temperature | 12,550[7] K |
| Rotational velocity (v sin i) | 30[8] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
Mu Mensae (μ Mensae) is a solitary,[10] blue-white hued star in the southern constellation of Mensa. With an apparent visual magnitude of 5.54,[2] it is just bright enough to be faintly visible to the naked eye. Based upon an annual parallax shift of 6.64 mas as seen from Earth,[1] this star is located roughly 490 light years from the Sun. At that distance, the visual magnitude is diminished by an extinction factor of 0.09 due to interstellar dust.[5]
The stellar classification of B8 II-III(p Si)[3] suggests that it is a B-type star with a spectrum that shows mixed traits of a giant and a bright giant star. It may be chemically peculiar with an overabundance of silicon in its outer atmosphere.[8] The estimated radius of the star is 3.3 times that of the Sun.[6] It is radiating 216 times the Sun's luminosity from its photosphere at an effective temperature of 12,550 K.[7]
References
- 1 2 3 4 5 6 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.
- 1 2 3 4 Johnson, H. L.; et al. (1966), "UBVRIJKL photometry of the bright stars", Communications of the Lunar and Planetary Laboratory, 4 (99), Bibcode:1966CoLPL...4...99J.
- 1 2 Houk, Nancy; Cowley, A. P. (1979), Michigan catalogue of two-dimensional spectral types for the HD stars, 1, Ann Arbor, Michigan: Dept. of Astronomy, University of Michigan, Bibcode:1978mcts.book.....H.
- ↑ 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, A61.
- 1 2 Gontcharov, G. A. (November 2012), "Spatial distribution and kinematics of OB stars", Astronomy Letters, 38 (11): 694–706, arXiv:1606.09028, Bibcode:2012AstL...38..694G, doi:10.1134/S1063773712110035.
- 1 2 Pasinetti Fracassini, L. E.; et al. (February 2001), "Catalogue of Apparent Diameters and Absolute Radii of Stars (CADARS)", Astronomy and Astrophysics (Third ed.), 367 (2): 521, arXiv:astro-ph/0012289, Bibcode:2001A&A...367..521P, doi:10.1051/0004-6361:20000451.
- 1 2 3 McDonald, I.; et al. (2012), "Fundamental Parameters and Infrared Excesses of Hipparcos Stars", Monthly Notices of the Royal Astronomical Society, 427 (1): 343–57, arXiv:1208.2037, Bibcode:2012MNRAS.427..343M, doi:10.1111/j.1365-2966.2012.21873.x.
- 1 2 Levato, H.; et al. (August 1996), "Radial velocities and axial rotation for a sample of chemically peculiar stars", Astronomy and Astrophysics Supplement, 118: 231–238, Bibcode:1996A&AS..118..231L, doi:10.1051/aas:1996192.
- ↑ "mu. Men". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2017-08-14.
- ↑ 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.