Alpha Centauri A

The position of Alpha Centauri A and Alpha Centauri B
Observation data
Epoch J2000.0      Equinox J2000.0
Constellation Centaurus
Alpha Centauri A
Right ascension 14h 39m 36.4951s
Declination -60° 50′ 02.308″
Apparent magnitude (V) −0.01
Alpha Centauri B
Right ascension 14h 39m 35.0803s
Declination -60° 50′ 13.761″
Apparent magnitude (V) +1.33
Characteristics
Spectral type G2V
U−B color index +0.23
B−V color index +0.69
Characteristics
Spectral type K1V
U−B color index +0.63
B−V color index +0.90
Astrometry
Radial velocity (Rv) −21.6 km/s
Proper motion (μ) RA: −3678.19 mas/yr
Dec.: 481.84 mas/yr
Parallax (π) 747.1 ± 1.2mas
Distance 4.366 ± 0.007 ly
(1.339 ± 0.002 pc)
Absolute magnitude (MV) 4.38 / 5.71
Details
Alpha Centauri A
Mass 1.100M
Radius 1.227R
Luminosity 1.519L
Surface gravity (log g) 4.30
Temperature 5790K
Metallicity 151% Sun
Rotation 22 days
Age 4.85×10 years
Alpha Centauri B
Mass 0.907M
Radius 0.865R
Luminosity 0.500L
Surface gravity (log g) 4.37
Temperature 5260K
Metallicity 160% Sun
Rotation 41 days
Age 4.85×10 years
Orbit
Companion Alpha Centauri AB
Period (P) 79.91 ± 0.011 yr
Semimajor axis (a) 17.57 ± 0.022"
Eccentricity (e) 0.5179 ± 0.00076
Inclination (i) 79.205 ± 0.041°
Longitude of the node (Ω) 204.85 ± 0.084°
Periastron epoch (T) 1875.66 ± 0.012
Argument of periastron (ω)
(secondary)
231.65 ± 0.076°
Other designations
Rigil Kentaurus, Rigil Kent, Toliman, Bungula, FK5 538, CP(D)−60°5483, GC 19728, CCDM J14396-6050

α Cen A

α1 Centauri, GJ 559 A, HR 5459, HD 128620, GCTP 3309.00, LHS 50, SAO 252838, HIP 71683

α Cen B

α2 Centauri, GJ 559 B, HR 5460, HD 128621, LHS 51, HIP 71681

α Cen C (= Proxima Cen)

LHS 49, HIP 70890
Database references
SIMBAD data
ARICNS data

Get more info about Rigel Kentaurus B in Wikipedia

This article uses material from the Wikipedia article
Rigel Kentaurus B, which is released under the Creative Commons Attribution-Share-Alike License 3.0