Omega Fornacis

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Omega Fornacis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Fornax[1][2]
Right ascension 2h 33m 50.704s[3]
Declination –28° 13′ 56.44″[3]
Apparent magnitude (V) 4.9[2]
Spectral type B9.5V[1][2]
U−B color index -0.13[1][2]
B−V color index -0.05[1][2]
R−I color index -0.07[1][2]
Radial velocity (Rv) –0.13 km/s
Proper motion (μ) RA: –13.24 ± 0.54[3] mas/yr
Dec.: –1.79 ± 0.60[3] mas/yr
Parallax (π) 6.74 ± 0.71[3] mas
Distance approx. 480 ly
(approx. 150 pc)
Absolute magnitude (MV) -0.96 [4]
Temperature 10910 ± 420[5] K
Other designations
CCDM J02338-2814AB, CD–28 819,SAO 167882,HD 16046,HR 749, HIP 11918[1]
Database references

Omega Fornacis (ω For) is a class B9.5V[2] (blue main-sequence) star in the constellation Fornax. Its apparent magnitude is 4.90[2] and it is approximately 480 light years away based on parallax.[3] It is a binary star with one A7V (white main-sequence) companion with apparent magnitude 7.88 and separation 10.8" (corresponding to roughly 1600 AU based on parallax).[6]


  1. ^ a b c d e f "Omega Fornacis". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2012-07-13. 
  2. ^ a b c d e f g h Hoffleit, D.; Warren, Jr., W. H. (1991). "VizieR Detailed Page". Bright Star Catalogue, 5th Revised Ed. (Preliminary Version). CDS. Retrieved 2012-07-13. 
  3. ^ a b c d e f van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653–664. arXiv:0708.1752Freely accessible. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357. Vizier catalog entry
  4. ^ Absolute magnitude calculated as , where is the star's absolute magnitude, is the star's apparent magnitude, and is the star's measured parallax in arcseconds.
  5. ^ Zorec, J.; et al. (2009). "Fundamental parameters of B supergiants from the BCD system. I. Calibration of the (λ_1, D) parameters into Teff". Astronomy and Astrophysics. 501 (1): 297–320. arXiv:0903.5134Freely accessible. Bibcode:2009A&A...501..297Z. doi:10.1051/0004-6361/200811147. 
  6. ^ 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:0806.2878Freely accessible. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x. Vizier catalog entry