Binary star system in the constellation Antlia.
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! style="text-align: center; background-color: #FFFFC0;" colspan="2" | Observation dataEpoch J2000      Equinox J2000
! style="text-align:left" | Constellation
! style="text-align:left" | Right ascension
! style="text-align:left" | Declination
! style="text-align:left" | Apparent magnitude (V)
! style="background-color: #FFFFC0; text-align: center;" colspan="2"| Characteristics
! style="text-align:left" | Spectral type
! style="text-align:left" | U−B 
! style="text-align:left" | B−V 
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Zeta1 Antliae is the Bayer designation for a binary star system in the southern constellation of Antlia. Based upon parallax measurements, the pair are located at a distance of roughly from Earth. They have apparent magnitudes of +6.20 and +7.01 and are separated by 8.042 arcseconds. The apparent magnitude of the combined system is +5.76, which is bright enough to be seen with the naked eye in suitably dark skies.
The two system components A and B are both A-type main sequence stars, hotter, larger, and more luminous than the Sun. The primary is spinning rapidly and the secondary relatively slowly. The primary has a mass of 2.46 M☉, an effective temperature of , a radius of 2.26 R☉, and a bolometric luminosity of 39.8 L☉. The secondary has a mass of 2.23 M☉, an effective temperature of , a radius of 1.74 R☉, and a bolometric luminosity of 16.9 L☉.
References.
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