Omega Fornacis

Omega Fornacis

Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Fornax[1][2]
Right ascension	2^h 33^m 50.704^s[3]
Declination	–28° 13′ 56.44″[3]
Apparent magnitude (V)	4.9[2]
Characteristics
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]
Astrometry
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]
Details
Temperature	10910 ± 420[5] K
Other designations
CCDM J02338-2814AB, CD–28 819，SAO 167882，HD 16046，HR 749, HIP 11918[1]
Database references
SIMBAD	data

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]

References

1. "Omega Fornacis". SIMBAD. Centre de Données astronomiques de Strasbourg. Retrieved 2012-07-13.
2. Hoffleit, D.; Warren, Jr., W. H. (1991). "VizieR Detailed Page". Bright Star Catalogue, 5th Revised Ed. (Preliminary Version). CDS. Retrieved 2012-07-13.
3. van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics 474 (2): 653–664. arXiv:0708.1752. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.Vizier catalog entry
4. Absolute magnitude calculated as $M = m + 5 (1 + \log_{10}{p})\!\,$, where $M$ is the star's absolute magnitude, $m$ is the star's apparent magnitude, and $p$ 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:0903.5134. 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:0806.2878. Bibcode:2008MNRAS.389..869E. doi:10.1111/j.1365-2966.2008.13596.x.Vizier catalog entry