Star Alpha Centauri

Triple star system Alpha Centauri is located 4.4 light years away from the Sun. It is a star system with 3 stars, from which the biggest has 110 % of solar mass. There are multiple known exoplanets in this system.

Sun distance: 4.4 light years.
(Position of this star is derived from Gaia mission data.)
Alpha Centauri A
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Yellow star
spectral class G2V

1.1 solar masses
1.2234 solar radii
temperature icontemperature 5753 °K (5480 °C)
time icon5.2 bilion years old star
luminosity icon1.519 solar luminosity
(No known exoplanets yet)
Alpha Centauri B
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Orange star
spectral class K1V

0.907 solar masses
0.8632 solar radii
temperature icontemperature 5242 °K (4969 °C)
time icon5.3 bilion years old star
luminosity icon0.5002 solar luminosity
(No known exoplanets yet)
Proxima Centauri
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Red dwarf
spectral class M5.5 Ve
flare star

0.1221 solar masses
0.1542 solar radii
temperature icontemperature 2883 °K (2610 °C)
time icon4.85 bilion years old star
luminosity icon0.00005 solar luminosity

1 known exoplanet:
Proxima Centauri b
| 1.3 earth masses
Other designations of this star
Alpha Centauri C, CCDM J14396-6050C, GCTP 3278.00, Gliese 551, HIP 70890, LFT 1110, LHS 49, LPM 526, LTT 5721, NLTT 37460, V645 Centauri, Toliman, α2 Centauri, HR 5460, HD 128621, LHS 51, HIP 71681, alf Cen B, Gliese 559, FK5 538, CD−60°5483, CCDM J14396-6050, GC 19728, α Cen A, Rigil Kentaurus, Rigil Kent, α1 Centauri, HR 5459, HD 128620, GCTP 3309.00, LHS 50, SAO 252838, HIP 71683, alf Cen A
News from this star system

Discovery of an Extremely Short Duration Flare from Proxima Centauri Using Millimeter through Far-ultraviolet Observations

Flares from the closest star Proxima Centauri could stand in a way of habitability of exoplanet Proxima Centauri b

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Closest stars
Distance
(Light Years)
Star name Mass
(Solar mass)
Planets
3.6
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0.03 M
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Barnard star 0.14 M
1
7.9
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WISE 0855−0714 0.01 M
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Ross 154 0.17 M
3D map of stellar neighborhood List of all nearby stars