Omega Fornacis

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Template:Short description

Omega Fornacis
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Fornax
Right ascension Template:RA[1]
Declination Template:DEC[1]
Apparent magnitude (V) 4.95 + 7.71[2]
Characteristics
A
Evolutionary stage main sequence[3]
Spectral type B9V[4]
U−B Template:Engvar −0.13[5]
B−V Template:Engvar Template:Val[6]
R−I Template:Engvar −0.07[5]
B
Spectral type A3V[7]
U−B Template:Engvar +0.09[8]
B−V Template:Engvar +0.17[8]
Astrometry
Radial velocity (Rv)Template:Val[6] km/s
Proper motion (μ) RA: Template:Val[1] mas/yr
Dec.: Template:Val[1] mas/yr
Parallax (π)7.0025±0.1527 mas[1]
DistanceTemplate:Rnd ± Template:Rnd ly
(Template:Rnd ± Template:Rnd pc)
Absolute magnitude (MV)−0.87[6]
Details
A
MassTemplate:Val[3] Template:Solar mass
Radius2.81[7] Template:Solar radius
LuminosityTemplate:Val[3] Template:Solar luminosity
TemperatureTemplate:Val[9] K
Rotational velocity (v sin i)Template:Val[7] km/s
B
Radius2.2[7] Template:Solar radius
Metallicity [Fe/H]{{{metal_fe2}}} dex
Rotational velocity (v sin i)Template:Val[7] km/s
Other designations
Template:Odlist[10]
Database references
SIMBADdata

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Omega Fornacis, which is Latinized from ω Fornacis, is a wide binary star[11] system in the southern constellation of Fornax. It has a blue-white hue and is faintly visible to the naked eye as a fifth-magnitude star.[6] The system lies at a distance of approximately 470 light years from the Sun based on parallax,[1] and is drifting further away with a radial velocity of +10 km/s.[6]

The dual nature of this system was discovered in 1836 by John Herschel. As of 2013, the two components had an angular separation of Template:Val along a position angle of 246°.[2] This corresponds to a projected separation of Template:Val.[7]

The magnitude 4.95[2] primary, designated component A, is a chemically peculiar[3] B-type main-sequence star with a stellar classification of B9V[4] It has 3.4[3] times the Sun's mass and is radiating around 268[3] times the luminosity of the Sun from its photosphere at an effective temperature of 10,910 K.[9] Component B, the magnitude 7.71[2] secondary, is an A-type main-sequence star with a class of A3V.[7] It is smaller than the primary, but has a higher projected rotational velocity.[7]

References

Template:Reflist

Template:Stars of Fornax

  1. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named GaiaDR2
  2. ↑ a b c d Cite error: Invalid <ref> tag; no text was provided for refs named WDSC2014
  3. ↑ a b c d e f Cite error: Invalid <ref> tag; no text was provided for refs named Zorec2012
  4. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named houk1979
  5. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Hoffleit1991
  6. ↑ a b c d e Cite error: Invalid <ref> tag; no text was provided for refs named Anderson2012
  7. ↑ a b c d e f g h Cite error: Invalid <ref> tag; no text was provided for refs named Howe2009
  8. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named corbally1984
  9. ↑ a b Cite error: Invalid <ref> tag; no text was provided for refs named Zorec2009
  10. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named SIMBAD
  11. ↑ Cite error: Invalid <ref> tag; no text was provided for refs named Eggleton2008
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