Alpha Centauri References | Navigâtion menuABABdatadatadata0708.17522007A&A...474..653V10.1051/0004-6361:200783572002yCat.2237....0Dastro-ph/06092582006A&A...460..695T10.1051/0004-6361:200656020004-63612005ApJS..159..141V10.1086/4305000067-004910.1007/978-3-642-22839-1_101614-659Xastro-ph/96091061997AJ....113.1445W10.1086/118360astro-ph/02062832002A&A...392L...9T10.1051/0004-6361:200210741610.061852017A&A...597A.137K10.1051/0004-6361/201629505astro-ph/05122192006A&A...449..723G10.1051/0004-6361:20053850astro-ph/03036342003A&A...404.1087K10.1051/0004-6361:200305700004-63610807.16862008ApJ...687.1264M10.1086/591785astro-ph/02024002002A&A...386..280P10.1051/0004-6361:2002028714h 39m 36.4951s, −60° 50′ 02.308″
Alpha CentauriCentaurus (constellation)G-teep main-sequence starnsK-teep main-sequence starnsM-teep main-sequence starnsSolar analogsTreeple starn seestemsMulti-starn planetar seestemsStarns wi proper namesBayer objectsHenry Draper Catalogue objectsHipparcos objectsHR objectsDurchmusterung objectsGliese an GJ objectsAstronomical objects diskivered in 1689Astronomical objects kent syne antiquityPlanetar seestems
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Alpha Centauri
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 α Centauri AB is the bricht starn tae the left, wi Proxima Centauri circled in reid. The bricht starn tae the richt is β Centauri | |
| Observation data Epoch J2000.0 Equinox J2000.0 | |
|---|---|
Constellation | Centaurus |
Alpha Centauri A | |
Richt ascension | 14h 39m 36.49400s[1] |
Declination | –60° 50′ 02.3737″[1] |
Apparent magnitude (V) | +0.01[2] |
Alpha Centauri B | |
Richt ascension | 14h 39m 35.06311s[1] |
Declination | –60° 50′ 15.0992″[1] |
Apparent magnitude (V) | +1.33[2] |
| Chairactereestics | |
| A | |
Spectral type | G2V[3] |
| U−B colour index | +0.24[2] |
| B−V colour index | +0.71[2] |
| B | |
Spectral teep | K1V[3] |
| U−B colour index | +0.68[2] |
| B−V colour index | +0.88[2] |
| Astrometry | |
| A | |
| Radial velocity (Rv) | 2998786000000000000♠−21.4±0.76[4] km/s |
| Proper motion (μ) | RA: −3679.25[1] mas/yr Dec.: 473.67[1] mas/yr |
| Parallax (π) | 754.81 ± 4.11[1]mas |
| Distance | 4.37[5]ly |
| Absolute magnitude (MV) | 4.38[6] |
| B | |
| Radial velocity (Rv) | 2998814000000000000♠−18.6±1.64[4] km/s |
| Proper motion (μ) | RA: −3614.39[1] mas/yr Dec.: 802.98[1] mas/yr |
| Parallax (π) | 754.81 ± 4.11[1]mas |
| Distance | 4.37[5]ly |
| Absolute magnitude (MV) | 5.71[6] |
| Details | |
| Alpha Centauri A | |
| Mass | 1.100[7] M☉ |
| Radius | 7000122340000000000♠1.2234±0.0053[8] R☉ |
| Luminosity | 1.519[7] L☉ |
| Surface gravity (log g) | 4.30[9] cgs |
| Temperatur | 5,790[7] K |
Metallicity [Fe/H] | 0.20[7] dex |
| Rotation | 22[10] days |
| Age | ≈4.4[11] Gyr |
| Alpha Centauri B | |
| Mass | 0.907[7] M☉ |
| Radius | 6999863200000000000♠0.8632±0.0037[8] R☉ |
| Luminosity | 0.5002[7] L☉ |
| Surface gravity (log g) | 4.37[9] cgs |
| Temperatur | 5,260[7] K |
| Metallicity | 0.23[7] |
| Rotation | 41[10] days |
| Age | ≈6.5[11] Gyr |
Orbit[12] | |
| Primar | A |
| Companion | B |
| Period (P) | 7001799100000000000♠79.91±0.011 yr |
| Semi-major axis (a) | 7001175700000000000♠17.57±0.022″ |
| Eccentricity (e) | 6999517900000000000♠0.5179±0.00076 |
| Inclination (i) | 7001792050000000000♠79.205±0.041° |
| Longitude o the node (Ω) | 7002204850000000000♠204.85±0.084° |
| Periastron epoch (T) | 7003187566000000000♠1875.66±0.012 |
Argument o periastron (ω) (seicontar) | 7002231650000000000♠231.65±0.076° |
| Ither designations | |
Toliman, Bungula, 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 | |
α Cen B: α2 Centauri, HR 5460, HD 128621, LHS 51, HIP 71681 | |
| Database references | |
| SIMBAD | AB |
| A | |
| B | |
| Exoplanet Archive | data |
| ARICNS | data |
| Extrasolar Planets Encyclopaedia | data |
Alpha Centauri (α Centauri, abbreviatit Alf Cen, α Cen) is the closest starn seestem tae the Solar Seestem, bein 4.37 light-years (1.34 pc) frae the Sun.
References |
↑ 1.01.11.21.31.41.51.61.71.81.9 Van Leeuwen, F. (2007). "Validation of the new Hipparcos reduction". Astronomy and Astrophysics. 474 (2): 653. arXiv:0708.1752
. Bibcode:2007A&A...474..653V. doi:10.1051/0004-6361:20078357.
↑ 2.02.12.22.32.42.5 Ducati, J. R. (2002). "VizieR Online Data Catalog: Catalogue of Stellar Photometry in Johnson's 11-color system". CDS/ADC Collection of Electronic Catalogues. 2237: 0. Bibcode:2002yCat.2237....0D.
↑ 3.03.1 Torres, C. A. O.; Quast, G. R.; da Silva, L .; de la Reza, R.; Melo, C. H. F.; Sterzik, M. (2006). "Search for associations containing young stars (SACY)". Astronomy and Astrophysics. 460 (3): 695–708. arXiv:astro-ph/0609258. Bibcode:2006A&A...460..695T. doi:10.1051/0004-6361:20065602. ISSN 0004-6361.
↑ 4.04.1 Valenti, Jeff A.; Fischer, Debra A. (2005). "Spectroscopic Properties of Cool Stars (SPOCS). I. 1040 F, G, and K Dwarfs from Keck, Lick, and AAT Planet Search Programs". The Astrophysical Journal Supplement Series. 159 (1): 141–166. Bibcode:2005ApJS..159..141V. doi:10.1086/430500. ISSN 0067-0049.
↑ 5.05.1 Wilkinson, John (2012). "The Sun and Stars". New Eyes on the Sun. Astronomers' Universe. pp. 219–236. doi:10.1007/978-3-642-22839-1_10. ISBN 978-3-642-22838-4. ISSN 1614-659X.
↑ 6.06.1 P. A. Wiegert; M. J. Holman (1997). "The stability of planets in the Alpha Centauri system". The Astronomical Journal. 113: 1445 – 1450. arXiv:astro-ph/9609106. Bibcode:1997AJ....113.1445W. doi:10.1086/118360.
↑ 7.07.17.27.37.47.57.67.7 Thévenin, F.; Provost, J.; Morel, P.; Berthomieu, G.; Bouchy, F.; Carrier, F. (2002). "Asteroseismology and calibration of alpha Cen binary system". Astronomy & Astrophysics. 392: L9. arXiv:astro-ph/0206283. Bibcode:2002A&A...392L...9T. doi:10.1051/0004-6361:20021074.
↑ 8.08.1 Kervella, P.; Bigot, L.; Gallenne, A.; Thévenin, F. (January 2017). "The radii and limb darkenings of α Centauri A and B. Interferometric measurements with VLTI/PIONIER". Astronomy & Astrophysics. 597. A137. arXiv:1610.06185. Bibcode:2017A&A...597A.137K. doi:10.1051/0004-6361/201629505.
↑ 9.09.1 Gilli G.; Israelian 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): 723–36. arXiv:astro-ph/0512219. Bibcode:2006A&A...449..723G. doi:10.1051/0004-6361:20053850. libcode 2005astro.ph.12219G.
↑ 10.010.1 Kervella, P.; Thévenin, F.; Ségransan, D.; Berthomieu, G.; Lopez, B.; Morel, P.; Provost, J. (2003). "The diameters of α Centauri A and B". Astronomy and Astrophysics. 404 (3): 1087–1097. arXiv:astro-ph/0303634. Bibcode:2003A&A...404.1087K. doi:10.1051/0004-6361:20030570. ISSN 0004-6361.
↑ 11.011.1 E. E. Mamajek; L. A. Hillenbrand (2008). "Improved Age Estimation for Solar-Type Dwarfs Using Activity-Rotation Diagnostics". Astrophysical Journal. 687 (2): 1264–1293. arXiv:0807.1686. Bibcode:2008ApJ...687.1264M. doi:10.1086/591785.
↑ Pourbaix, D.; et al. (2002). "Constraining the difference in convective blueshift between the components of alpha Centauri with precise radial velocities". Astronomy and Astrophysics. 386 (1): 280–85. arXiv:astro-ph/0202400. Bibcode:2002A&A...386..280P. doi:10.1051/0004-6361:20020287.
Coordinates: 
14h 39m 36.4951s, −60° 50′ 02.308″
Categeries:
- Alpha Centauri
- Centaurus (constellation)
- G-teep main-sequence starns
- K-teep main-sequence starns
- M-teep main-sequence starns
- Solar analogs
- Treeple starn seestems
- Multi-starn planetar seestems
- Starns wi proper names
- Bayer objects
- Henry Draper Catalogue objects
- Hipparcos objects
- HR objects
- Durchmusterung objects
- Gliese an GJ objects
- Astronomical objects diskivered in 1689
- Astronomical objects kent syne antiquity
- Planetar seestems
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