Iota2 Muscae
Observation data
Epoch 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]
Distance492 ± 3 ly
(150.9 ± 0.8 pc)
Absolute magnitude (MV)0.61[2]
Details
Mass2.8[6] M☉
Radius2.5[6] R☉
Luminosity71[6] L☉
Surface gravity (log g)4.09[6] cgs
Temperature10,641[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
SIMBADdata

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.

References

  1. 1 2 3 4 5 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.
  2. 1 2 3 4 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.
  3. 1 2 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.
  4. ↑ 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
  5. ↑ 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.
  6. 1 2 3 4 5 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.
  7. ↑ 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.
  8. ↑ "iot02 Mus", SIMBAD, Centre de données astronomiques de Strasbourg, retrieved 2019-08-26.
  9. ↑ 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.
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