Zeta1 Antliae

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For other stars with this designation, see Zeta Antliae.
Zeta1 Antliae
Diagram showing star positions and boundaries of the Antlia constellation and its surroundings
Cercle rouge 100%.svg

ζ1 Antliae (circled)
Observation data
Epoch J2000      Equinox J2000
Constellation Antlia
Right ascension 09h 30m 46.09678s[1]
Declination –31° 53′ 21.1911″[1]
Apparent magnitude (V) 5.76[2] (6.20/7.01)[3]
Spectral type A0 V + A2 V[3]
U−B color index +0.05[2]
B−V color index +0.05[2]
Proper motion (μ) RA: +22.31[1] mas/yr
Dec.: –20.12[1] mas/yr
Parallax (π) 8.04 ± 0.72[1] mas
Distance 410 ± 40 ly
(120 ± 10 pc)
zet1 Ant A
Rotational velocity (v sin i) 204[4] km/s
zet1 Ant B
Rotational velocity (v sin i) 50[4] km/s
Other designations
HIP 46657, CCDM 09308-3153.[5]
zet1 Ant A: GC 13137, HD 82384, HR 3781, SAO 200445.
zet1 Ant B: GC 13135, HD 82383, HR 3780, SAO 200444
Database references
Database references

Zeta1 Antliae is the Bayer designation for a binary star[3] system in the southern constellation of Antlia. Based upon parallax measurements, the pair are located at a distance of roughly 410 light-years (130 parsecs) from Earth.[1] Both components are rapidly rotating[4] A-type main sequence stars.[3] They have apparent magnitudes of +6.20 and 7.01 and are separated by 8.042 arcseconds.[3] The apparent magnitude of the combined system is +5.76,[2] which is bright enough to be seen with the naked eye in suitably dark skies.


  1. ^ a b c d e f van Leeuwen, F. (November 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. 
  2. ^ a b c d Hurly, P. R. (1975), "Combined-light UBV Photometry of 103 Bright Southern Visual Doubles", Monthly Notes of the Astronomical Society of Southern Africa, 34: 7, Bibcode:1975MNSSA..34....7H. 
  3. ^ a b c d e 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. 
  4. ^ a b c Royer, F.; et al. (January 2012), "Rotational velocities of A-type stars. I. Measurement of v sin i in the southern hemisphere", Astronomy and Astrophysics, 381: 105–121, arXiv:astro-ph/0110490Freely accessible, Bibcode:2002A&A...381..105R, doi:10.1051/0004-6361:20011422. 
  5. ^ "IDS 09265-3127 AB -- Double or multiple star", SIMBAD Astronomical Object Database, Centre de Données astronomiques de Strasbourg, retrieved 2012-06-27.