HD 129456

HD 129456, also known by its Bayer designation c¹ Centauri (c¹ Cen), is a star in the constellation Centaurus. c¹ Centauri is an orange K-type giant with an apparent magnitude of +4.06. It is approximately 209 light years from Earth.

ConstellationCentaurus^[1]

Right ascension14^h 43^m 39.44^s[2]

Declination−35° 10′ 25.2″^[2]

Apparentmagnitude(V)+4.06^[3]

Quick facts Observation data Epoch J2000.0 Equinox J2000.0, Constellation ...

c¹ Centauri

Location of c1 Centauri (circled in red)
Observation data Epoch J2000.0      Equinox J2000.0
Constellation	Centaurus[1]
Right ascension	14h 43m 39.44s[2]
Declination	−35° 10′ 25.2″[2]
Apparent magnitude (V)	+4.06[3]
Characteristics
Evolutionary stage	red giant branch[4]
Spectral type	K3III[3]
U−B color index	+1.53
B−V color index	+1.356[3]
Variable type	none
Astrometry
Radial velocity (Rv)	−38 km/s
Proper motion (μ)	RA: −61.46±0.15[2] mas/yr Dec.: −176.84±0.14[2] mas/yr
Parallax (π)	15.57±0.16 mas[2]
Distance	209 ± 2 ly (64.2 ± 0.7 pc)
Absolute magnitude (MV)	−0.20[3]
Details
Mass	1.23[5] M☉
Radius	25[6] R☉
Luminosity	174[5] L☉
Surface gravity (log g)	1.86[7] cgs
Temperature	4,240[5] K
Metallicity [Fe/H]	−0.20[5] dex
Other designations
HR 5485, HD 129456, CD−34°9868, FK5 544, HIP 72010, SAO 205871, GC 19820[8]
Database references
SIMBAD	data

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