22 Orionis

From Wikipedia, the free encyclopedia
Jump to: navigation, search
This article is about o Orionis. It is not to be confused with ο Orionis.
22 Orionis
Orion constellation map.svg
Red circle.svg

Location of 22 Orionis (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Orion
Right ascension 05h 21m 45.747s[1]
Declination 0° 22′ 56.87″[1]
Apparent magnitude (V) 4.74[2]
Characteristics
Spectral type B2IV-V[3]
U−B color index -0.79[2]
B−V color index -0.16[2]
Astrometry
Radial velocity (Rv) +28.80[4] km/s
Proper motion (μ) RA: +1.23[5] mas/yr
Dec.: +1.13[5] mas/yr
Parallax (π) 3.51 ± 0.49[5] mas
Distance approx. 900 ly
(approx. 280 pc)
Absolute magnitude (MV) -2.98[6]
Details
Mass 9.0[7] M
Luminosity 6080[8] L
Surface gravity (log g) 3.56[9] cgs
Temperature 21,150[8] K
Metallicity [Fe/H] -0.31[6] dex
Rotational velocity (v sin i) 5[10] km/s
Other designations
o Orionis, BD-00°930, FK5 1147, GC 6579, HIP 25044, HR 1765, HD 35039, NSV 16291, SAO 132028
Database references
SIMBAD data

22 Orionis (22 Ori) is a class B2IV-V[3] (blue subgiant) star in the constellation Orion. Its apparent magnitude is 4.74[2] and it is approximately 930 light years away based on parallax.[5]

It is a suspected Beta Cephei variable.[11]

References[edit]

  1. ^ a b Høg, E.; Fabricius, C.; Makarov, V. V.; Urban, S.; Corbin, T.; Wycoff, G.; Bastian, U.; Schwekendiek, P.; Wicenec, A. (2000). "The Tycho-2 catalogue of the 2.5 million brightest stars". Astronomy and Astrophysics. 355: L27. Bibcode:2000A&A...355L..27H. 
  2. ^ a b c d Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237. Bibcode:2002yCat.2237....0D. 
  3. ^ a b Hoffleit, D.; Warren, W. H. (1995). "VizieR Online Data Catalog: Bright Star Catalogue, 5th Revised Ed. (Hoffleit+, 1991)". VizieR On-line Data Catalog: V/50. Originally published in: 1964BS....C......0H. 5050. Bibcode:1995yCat.5050....0H. 
  4. ^ Wilson, R. E. (1953). General Catalogue of Stellar Radial Velocities. Carnegie Institution for Science. Bibcode:1953GCRV..C......0W. LCCN 54001336. 
  5. ^ a b c d Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.  Vizier catalog entry
  6. ^ a b Anderson, E.; Francis, Ch. (2012). "XHIP: An extended hipparcos compilation". Astronomy Letters. 38 (5): 331. arXiv:1108.4971Freely accessible. Bibcode:2012AstL...38..331A. doi:10.1134/S1063773712050015.  Vizier catalog entry
  7. ^ Tetzlaff, N.; Neuhäuser, R.; Hohle, M. M. (2011). "A catalogue of young runaway Hipparcos stars within 3 kpc from the Sun". Monthly Notices of the Royal Astronomical Society. 410: 190. arXiv:1007.4883Freely accessible. Bibcode:2011MNRAS.410..190T. doi:10.1111/j.1365-2966.2010.17434.x.  Vizier catalog entry
  8. ^ a b Hohle, M.M.; Neuhäuser, R.; Schutz, B.F. (2010). "Masses and luminosities of O- and B-type stars and red supergiants". Astronomische Nachrichten. 331 (4): 349. arXiv:1003.2335Freely accessible. Bibcode:2010AN....331..349H. doi:10.1002/asna.200911355.  Vizier catalog entry
  9. ^ Soubiran, Caroline; Le Campion, Jean-François; Brouillet, Nathalie; Chemin, Laurent (2016). "The PASTEL catalogue: 2016 version". Astronomy & Astrophysics. 591: A118. arXiv:1605.07384Freely accessible. Bibcode:2016A&A...591A.118S. doi:10.1051/0004-6361/201628497. 
  10. ^ Abt, Helmut A.; Levato, Hugo; Grosso, Monica (2002). "Rotational Velocities of B Stars". The Astrophysical Journal. 573: 359. Bibcode:2002ApJ...573..359A. doi:10.1086/340590. 
  11. ^ Samus, N. N.; Durlevich, O. V.; et al. (2009). "VizieR Online Data Catalog: General Catalogue of Variable Stars (Samus+ 2007-2013)". VizieR On-line Data Catalog: B/gcvs. Originally published in: 2009yCat....102025S. 1. Bibcode:2009yCat....1.2025S.