HD 85725

HD 85725, also known as HR 3916, is a yellow hued star located in the southern constellation Antlia. It has an apparent magnitude of 6.29,^[1] placing it near the limit for naked eye visibility. The object is relatively close at a distance of 176 light-years,^[2] but is receding with a heliocentric radial velocity of 61.6 km/s.^[5]

HD 85725

Observation data Epoch J2000      Equinox J2000
Constellation	Antlia[1]
Right ascension	09h 52m 58.02763s[2]
Declination	−27° 19′ 55.8219″[2]
Apparent magnitude (V)	6.28[1]
Characteristics
Evolutionary stage	subgiant[2]
Spectral type	G1 V[3]
B−V color index	+0.62[4]
Astrometry
Radial velocity (Rv)	61.6±0.1[5] km/s
Proper motion (μ)	RA: −278.245 mas/yr[2] Dec.: +95.043 mas/yr[2]
Parallax (π)	18.5634±0.0256 mas[2]
Distance	175.7 ± 0.2 ly (53.87 ± 0.07 pc)
Absolute magnitude (MV)	+2.68[1]
Details
Mass	1.42[6] M☉
Radius	2.59±0.11[7] R☉
Luminosity	7.58[8] L☉
Surface gravity (log g)	3.86[9] cgs
Temperature	5,940±110[7] K
Metallicity [Fe/H]	+0.15[10] dex
Rotational velocity (v sin i)	5.9±0.3[11] km/s
Age	2.75[6] Gyr
Other designations
33 G. Antliae, CD−26°7505, CPD−26°4079, HIP 48468, HR 3916, SAO 178130, WDS J09530-2720A[12]
Database references
SIMBAD	data

HD 85725 has a stellar classification of G1 V,^[3] which suggests that it is an ordinary G-type main-sequence star that is fusing hydrogen at its core. However, a low surface gravity of 7,244 cm/s^2[9] and evolutionary models indicate that is an evolved subgiant.^[2]

At present it has 143%^[6] the mass of the Sun but is 2.59 times larger,^[7] which is not characteristic of a yellow dwarf. It shines at 7.6^[8] times the luminosity of the Sun from its photosphere at a surface temperature of 5,940 K,^[7] which gives it a yellow glow. At an age of 2.75 billion years,^[6] HD 85725 is spinning leisurely with a projected rotational velocity of 5.9 km/s.^[11]

There is a 10th magnitude companion located 1.5″ away along a position angle of 25°. It appears to have a common proper motion with the star, suggesting physical relation.^[13]