Iota2 Muscae (original) (raw)
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B-type main sequence star in the constellation Musca
Iota2 Muscae
| Observation dataEpoch J2000.0 Equinox J2000.0 (ICRS) | |
|---|---|
| Constellation | Musca |
| Right ascension | 13h 27m 18.49716s[1] |
| Declination | −74° 41′ 30.3203″[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: −35.337[1] mas/yr Dec.: −13.814[1] mas/yr |
| Parallax (π) | 6.6274 ± 0.0366 mas[1] |
| Distance | 492 ± 3 ly (150.9 ± 0.8 pc) |
| Absolute magnitude (MV) | 0.61[2] |
| Details | |
| Mass | 2.8[6] M☉ |
| Radius | 2.5[6] R☉ |
| Luminosity | 71[6] L☉ |
| Surface gravity (log g) | 4.09[6] cgs |
| Temperature | 10,641[6] K |
| Metallicity [Fe/H] | −0.19[7] dex |
| Rotational velocity (v sin i) | 116[3] km/s |
| Other designations | |
| ι2 Mus, CD−74°793, HD 116579, HIP 65628, HR 5051, SAO 257047[8] | |
| Database references | |
| SIMBAD | data |
ι2 Muscae, Latinised as Iota2 Muscae, is a blue-white-hued star in the southern constellation Musca, near the constellation's southern 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 492 light-years (151 parsecs) from the Sun. It is a member of the Hyades Stream, but is not part of the Hyades or Praesepe open clusters.[9]
This is a B-type main-sequence star with a stellar classification of B9V. It has a high rate of spin, showing a projected rotational velocity of 116 km/s. The star has 2.8 times the mass of the Sun and is radiating 71 times the Sun's luminosity from its photosphere at an effective temperature of about 10,641 K.
- ^ a b c d e 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.
- ^ 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, S2CID 119257644.
- ^ a b 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, S2CID 55586789.
- ^ 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, S2CID 59451347, A61.
- ^ a b c d e Stassun, Keivan G.; et al. (9 September 2019), "The Revised TESS Input Catalog and Candidate Target List", The Astronomical Journal, 158 (4): 138, arXiv:1905.10694, Bibcode:2019AJ....158..138S, doi:10.3847/1538-3881/ab3467, eISSN 1538-3881.
- ^ Anders, F.; Khalatyan, A.; Queiroz, A. B. A.; Chiappini, C.; Ardevol, J.; Casamiquela, L.; Figueras, F.; Jimenez-Arranz, O.; Jordi, C.; Monguio, M.; Romero-Gomez, M.; Altamirano, D.; Antoja, T.; Assaad, R.; Cantat-Gaudin, T.; Castro-Ginard, A.; Enke, H.; Girardi, L.; Guiglion, G.; Khan, S.; Luri, X.; Miglio, A.; Minchev, I.; Ramos, P.; Santiago, B. X.; Steinmetz, M. (2022), "VizieR Online Data Catalog: StarHorse2, Gaia EDR3 photo-astrometric distances (Anders+, 2022)", Vizier Online Data Catalog, Bibcode:2022yCat.1354....0A.
- ^ "iot02 Mus", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2019-08-26.
- ^ 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.