HD 125628

HD 125628 is a binary star^[3] system in the constellation Centaurus. It is faintly visible to the naked eye with a combined apparent visual magnitude of 4.76.^[1] The distance to this system is approximately 380 light years based on parallax. It is drifting further away from the Sun with a radial velocity of +15 km/s.^[1] The absolute magnitude is −0.55.^[1]

ConstellationCentaurus^[1]

Right ascension14^h 22^m 37.07301^s[2]

Declination−58° 27′ 32.8193″^[2]

Apparentmagnitude(V)4.76^[1] (5.09 + 6.94)^[3]

Quick facts Constellation, Right ascension ...

HD 125628

Location of HD 125628 (circled in red)
Observation data Epoch J2000      Equinox ICRS
Constellation	Centaurus[1]
Right ascension	14h 22m 37.07301s[2]
Declination	−58° 27′ 32.8193″[2]
Apparent magnitude (V)	4.76[1] (5.09 + 6.94)[3]
Characteristics
A
Evolutionary stage	giant[4]
Spectral type	G9III[3]
B−V color index	+0.795±0.003[1]
B
Evolutionary stage	main sequence[5]
Spectral type	F5V[3]
B−V color index	+0.45[4]
Astrometry
A
Radial velocity (Rv)	+14.6±2.8[1] km/s
B
Proper motion (μ)	RA: −39.763 mas/yr[5] Dec.: +24.058 mas/yr[5]
Parallax (π)	13.0246±0.0192 mas[5]
Distance	250.4 ± 0.4 ly (76.8 ± 0.1 pc)
Details
A
Mass	2.9[6] M☉
Radius	12.3[6] R☉
Surface gravity (log g)	2.73[6] cgs
Temperature	5,370[6] K
Rotational velocity (v sin i)	5.5[4] km/s
Age	3.6[4] Gyr
B
Mass	1.4[7] M☉
Radius	2.1[7] R☉
Luminosity	7.5[7] L☉
Surface gravity (log g)	3.95[7] cgs
Temperature	6,642[7] K
Rotational velocity (v sin i)	6.3[4] km/s
Age	2.7[4] Gyr
Other designations
CPD−57°6619, HD 125628, HIP 70264, HR 5371, SAO 241673[8]
Database references
SIMBAD	data

Close

The primary component of this system, component A, is an aging giant star with a stellar classification of G9III^[3] and a visual magnitude of 5.09.^[3] The secondary companion, designated component B, is a magnitude 6.94^[3] star located at an angular separation of 9.10″ from the primary, along a position angle of 157°, as of 2016.^[9] It is an F-type main-sequence star with a class of F5V.^[3]