Stellar Closeup






System and Stellar Vitals:

Alpha Centauri


SYSTEM:
 Sky Position:   14h 39m 36.2s -60 50' 7" [epoch 2000]
Distance:   1.33 parsecs, 4.34 light years [Alpha Cen A & B]
1.31 parsecs, 4.27 light years [Alpha Cen C]
Number of Suns:   3
Orbit (A-B):   80 years — separation: 11 – 35 A.U.

Orbit (AB-C):   magnitude of half a million years — sep: > 14,000 A.U.

Estimated Age:   8.17 billion years
Fe/H:   0.15 (Sol)


ALPHA CENTAURI A:
Mass:   1.10 x Sol
Known Planets:   0

Identities:   a.k.a. Rigel Kentaurus, Toliman

Flamsteed-Bayer:   Alpha Centauri A HD:   128620
HIP:   71683 HR:   5459
Gliese:   559 A SAO:   252838
DM:   CP -60 5483 A MSDB:   2505

Appearance:   Alpha Centauri A   Sol
Spectral Type:   G2 V
Radius:   1.07 x Sol
Visual Magnitude:   -0.01


ALPHA CENTAURI B:
Known Planets:   0
Mass:   0.85 x Sol

Identities:  

Flamsteed-Bayer:   Alpha Centauri B HD:   128621
HIP:   71681 HR:   5460
Gliese:   559 B SAO:  
DM:   CP -60 5483 B MSDB:   2506

Appearance:   Alpha Centauri B   Sol
Spectral Type:   K0 V
Approx. Radius:   1.22 x Sol
Visual Magnitude:   1.34


ALPHA CENTAURI C:
Known Planets:   0
Mass:   0.10 x Sol (0.05)

Identities:   a.k.a. "Proxima Centauri"

Flamsteed-Bayer:   Alpha Centauri C HD:  
HIP:   70890 HR:  
Gliese:   551 SAO:  
DM:   MSDB:   2504

Appearance:   Alpha Centauri C   Sol
Spectral Type:   M5 V
Approx. Radius:   0.05 x Sol
Visual Magnitude:   11.0