Alpha Antliae

α Antliae
Observation data Epoch J2000.0 Equinox J2000.0 (ICRS)
Location of α Antliae to the upper left of center
Constellation	Antlia
Right ascension	10^h 27^m 09.10037^s
Declination	−31° 04′ 03.9961″
Apparent magnitude (V)	4.22 to 4.29
Characteristics
Spectral type	K4 III
U−B color index	+1.63
B−V color index	+1.45
R−I color index	+0.79
Variable type	Suspected
Astrometry

Radial velocity (R_v)	12.2 ± 2 km/s
Proper motion (μ)	RA: –81.61 ± 0,32 mas/yr Dec.: +10.53 ± 0,50 mas/yr
Parallax (π)	8.91 ± 0.49mas
Distance	370 ± 20 ly (112 ± 6 pc)

Details

Mass	2.2 M_☉
Radius	53 R_☉
Luminosity (bolometric)	555 L_☉
Surface gravity (log g)	1.77 cgs
Temperature	3990 K
Metallicity [Fe/H]	-0.39 dex

Other designations
α Ant, Alpha Antliae, Alpha Ant, 2MASS J10270911-3104039, CD−30 8465, CPC 17 5084, CPD−30 3121, FK5 392, GC 14352, HD 90610, HIP 51172, HR 4104, NSV 4862, PPM 287713, SAO 201405.
Database references
SIMBAD	data

Alpha Antliae (Alpha Ant, α Antliae, α Ant) is the brightest star in the constellation of Antlia but it has not been given a proper name. It is approximately 370 light-years from the Solar System. It is a K-type giant star that varies in apparent visual magnitude between 4.22 and 4.29. This star has 2.2 times the mass of the Sun and has expanded to 53 times the solar radius. Compared to the Sun, it has only 41% of the abundance of elements other than hydrogen and helium.