Zeta1 Antliae

Zeta¹ Antliae

ζ^1 Antliae (circled)
Observation data Epoch J2000      Equinox J2000
Constellation	Antlia
Right ascension	09^h 30^m 46.09678^s[1]
Declination	–31° 53′ 21.1911″[1]
Apparent magnitude (V)	5.76[2] (6.20/7.01)[3]
Characteristics
Spectral type	A0 V + A2 V[3]
U−B color index	+0.05[2]
B−V color index	+0.05[2]
Astrometry
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)
Details
zet^1 Ant A
Rotational velocity (v sin i)	204[4] km/s
zet^1 Ant B
Rotational velocity (v sin i)	50[4] km/s
Other designations
HIP 46657, CCDM 09308-3153.[5]
zet^1 Ant A: GC 13137, HD 82384, HR 3781, SAO 200445.
zet^1 Ant B: GC 13135, HD 82383, HR 3780, SAO 200444
Database references
SIMBAD	data
Database references
SIMBAD	data

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.

References

1. van Leeuwen, F. (November 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.
2. 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. 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.
4. 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/0110490, 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.