Iota2 Muscae
| Observation data Epoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Grus |
| Right ascension | 13h 27m 18.49881s[1] |
| Declination | −74° 41′ 30.3200″[1] |
| Apparent magnitude (V) | 6.62[2] |
| Characteristics | |
| Evolutionary stage | main sequence[3] |
| Spectral type | B9V[4] |
| B−V color index | −0.056±0.004[2] |
| Astrometry | |
| Radial velocity (Rv) | −3.0±7.4[5] km/s |
| Proper motion (μ) | RA: +35.155[1] mas/yr Dec.: +13.846[1] mas/yr |
| Parallax (π) | 6.4238 ± 0.0523 mas[1] |
| Distance | 508 ± 4 ly (156 ± 1 pc) |
| Absolute magnitude (MV) | 0.61[2] |
| Details | |
| Mass | 2.74±0.05[3] M☉ |
| Luminosity | 73.3+8.0 −7.2[3] L☉ |
| Temperature | 10,641+99 −97[3] K |
| Rotational velocity (v sin i) | 116[3] km/s |
| Other designations | |
| Database references | |
| SIMBAD | data |
ι2 Muscae, Latinised as Iota2 Muscae, is a blue-white hued star in the southern constellation Musca, near the souther constellation border with Chamaeleon. It has an apparent visual magnitude of 6.62,[2] which is just below the normal limit of stellar brightness visible to the naked eye. Based upon parallax measurements, it is located around 508 light-years (156 pc) from the Sun. It is a member of the Hyades Stream, but is not part of the Hyades or Praesepe open clusters.[7]
This is a B-type main-sequence star with a stellar classification of B9V.[4] It has a high rate of spin, showing a projected rotational velocity of 116 km/s.[3] The star has 2.7[3] times the mass of the Sun and is radiating 73[3] times the Sun's luminosity from its photosphere at an effective temperature of about 10,641 K.[3]
References
- ^ a b c d e 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 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.
- ^ a b c d e f g h i Zorec, J.; Royer, F. (2012), "Rotational velocities of A-type stars. IV. Evolution of rotational velocities", Astronomy & Astrophysics, 537: A120, arXiv:1201.2052, Bibcode:2012A&A...537A.120Z, doi:10.1051/0004-6361/201117691.
- ^ a b Houk, Nancy (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
- ^ 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.
- ^ "iot02 Mus". SIMBAD. Centre de données astronomiques de Strasbourg. Retrieved 2019-08-26.
{{cite web}}: CS1 maint: postscript (link) - ^ Eggen, O. J.; Iben, Icko, Jr. (1988), "Starbursts, binary stars, and blue stragglers in local superclusters and groups. I - The very young disk and young disk populations", Astronomical Journal, 96: 635–669, Bibcode:1988AJ.....96..635E, doi:10.1086/114834.
{{citation}}: CS1 maint: multiple names: authors list (link)
