Epoch J2000 Equinox J2000
|Right ascension||10h 29m 35.37844s|
|Declination||–30° 36′ 25.4413″|
|Apparent magnitude (V)||+5.55 (5.58/9.65)|
|Spectral type||B9.5 V + F9 Ve|
|U−B color index||–0.18|
|B−V color index||–0.04|
|Radial velocity (Rv)||+14 km/s|
|Proper motion (μ)||RA: –29.47 mas/yr
Dec.: +1.66 mas/yr
|Parallax (π)||6.78 ± 0.74 mas|
|Distance||approx. 480 ly
(approx. 150 pc)
|Absolute magnitude (MV)||–0.37|
|δ Ant A|
|Mass||3.35 ± 0.15 M☉|
|Rotational velocity (v sin i)||27 km/s|
Delta Antliae (δ Ant, δ Antliae) is the Bayer designation for a binary star system in the southern constellation of Antlia. The combined apparent visual magnitude of the system is +5.57, allowing it to be viewed from the suburbs with the naked eye. Judging by the parallax shift of this system, is located at a distance of roughly 480 light-years (150 parsecs) from Earth. The system is reduced in magnitude by 0.03 due to extinction caused by intervening gas and dust.
The primary component of the system has a stellar classification of B9.5 V, indicating that it is a B-type main sequence star. The companion is an F-type main sequence star with a classification of F9 Ve, where the 'e' indicates that there are emission lines in the spectrum. The two stars are separated by 11 arcseconds.
Delta Antliae A, the brighter member of this system, has an estimated 3.4 times the mass of the Sun. It is radiating around 200 times as much luminosity as the Sun from its outer atmosphere at an effective temperature of 11,117 K. At this heat, it shines with the characteristic blue-white hue of a B-type star.
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