Alpha Centauri

Alpha Centauri A/B/C

Panggonan Alpha Centauri, bareng karo Beta Centauri dadi "pointer" kanggo rasi Salib Kidul.
Dhata pangamatan Epos J2000
Rasi lintang	Centaurus
Asensio rekta	14j 39m 36.5/35.1d
Dhéklinasi	-60° 50′ 02.3/13.8″
Magnitudo katon (V)	-0.01/+1.34/+11.05
Ciri-ciri
Kelas spektrum	G2 V/K1 V/M5.5 Ve
Indèks warna U-B	0.24/0.64/1.54
Indèks warna B-V	0.65/0.85/1.97
Jinis variabel	Ora ana
Astrometri
Kacepetan radhial (Rv)	-21.6 km/s
Gerak dhiri (μ)	RA: -3678.19 mas/taun Dek.: 481.84 mas/taun
Paralaks (π)	747.23 ± 1.17 mas
Let	4.365 ± 0.007 tc (1.338 ± 0.002 pc)
Magnitudo mutlak (MV)	4.38/5.71/15.49
Detail
Massa	1.100/0.907/0.1 M☉
Radhius	1.227/0.865/0.2 R☉
Gravitasi permukaan (log g)	4.30/4.37[1]
Luminositas	1.519/0.500/0.00006 L☉
Suhu	5,800/5,300/2700 K
Metalisitas	130-230% Sun
Rotasi	?
Umur	5-6 × 109 taun
Orbit lintang gandha visual
Lintang sékundhèr	Alpha Centauri B
Periodhe (P)	79.24 taun
Sumbu semi-mayor (a)	17.59"
Eksentrisitas (e)	0.516
Inklinasi (i)	79.24°
Bujur node (Ω)	204.87°
Epoch periastron (T)	1955.56
Réferènsi database
SIMBAD	data
ARICNS	data
Pamènèhan jeneng liya
Rigil Kentaurus, Rigil Kent, Toliman, Bungula, FK5 538, CP(D)−60°5483, GC 19728, CCDM J14396-6050 α Cen A Gl 559 A, HR 5459, HD 128620, GCTP 3309.00, LHS 50, SAO 252838, HIP 71683 α Cen B Gl 559 B, HR 5460, HD 128621, LHS 51, HIP 71681 Proxima Cen LHS 49, HIP 70890
Réferènsi database
SIMBAD	data

Alpha Centauri (α Cen / α Centauri); (ditepungi uga minangka Rigil Kentaurus, Rigil Kent, utawa Toliman) ya iku lintang ingkang padhang piyambak ing rasi Centaurus. Sanadyan kétok kaya saktitik dideleng nganggo mata, lintang iki sajatiné wujud sistem telung lintang.

Alpha Centauri ya iku sistem lintang paling cedhak saka pranata surya, kanthi let 4,2 tekan 4,4 taun cahya. Amarga iku, akèh carita fiksi èlmiah mbayangaké salah sijining dina manungsa arep lunga menyang kana.

1. ↑ Gilli, G.; Israèlian, G.; Ecuvillon, A.; Santos, N. C.; Mayor, M. (2006). "Abundances of Refractory Elements in the Atmospheres of Stars with Extrasolar Planets". Astronomy and Astrophysics. 449 (2): 723–736. Dibukak ing 2007-06-01.{{cite journal}}: CS1 maint: multiple names: authors list (link)