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Alpha Centauri

The position of Alpha Centauri.
Observation data Epoch J2000      Equinox J2000
Constellation	Centaurus
Right ascension	14h 39m 36.2s
Declination	-60° 50′ 8.2″
Apparent magnitude (V)	0.01
Characteristics
Spectral type	G2 V
U−B color index	0.24
B−V color index	0.65
Variable type	N/A
Astrometry
Radial velocity (Rv)	21.6 km/s
Proper motion (μ)	RA: -3678.19 mas/yr Dec.: +481.84 mas/yr
Parallax (π)	747.23 ± 1.17 mas
Distance	4.38 ly (1.33 pc)
Absolute magnitude (MV)	4.40
Details
Mass	1.10/0.91 M☉
Radius	1.23/0.87 R☉
Luminosity	1.57/0.51 L☉
Temperature	5,800/5,300 K
Metallicity	130-230% Sun
Rotation	?
Age	5-6 × 109 years
Orbit
Companion	Alpha Centauri B
Period (P)	79.92 yr
Semi-major axis (a)	17.515″
Eccentricity (e)	0.516
Inclination (i)	79.24°
Longitude of the node (Ω)	204.87° (ascending)°
Periastron epoch (T)	1955.56
Other designations
α1 Cen, CP -60° 5483 A, Gliese 559A, FK5 538, HD 128620, HIP 71683, HR 5459, LHS 50, SAO 252838, YPC 3309.00

This table is composed of the following sub-templates:

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• {{Starbox image}}
• {{Starbox observe}}
• {{Starbox character}}
• {{Starbox astrometry}}
• {{Starbox visbin}}
• {{Starbox detail}}
• {{Starbox catalog}}
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References:[1] [2] [3]

Short star template

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Footers

• Template:ConstellationsListedByPtolemy - Ptolemy's constellations
• Template:ConstellationList - Modern constellations
  • Template:ConstellationsRoyerAltered - Constellations altered by Augustin Royer in 1679

SN 1987A

1987A supernova remnant near the center
IIp (unusual)
Date	24 February 1987 (23:00 UTC)
Constellation	Dorado
Right ascension	05h 35m 49.942s (1950)
Declination	−69° 17′ 57.60″ (1950)
Epoch	J2000.0
Galactic coordinates	unknown
Remnant	unknown
Host	Large Magellanic Cloud (LMC)
Progenitor	Sanduleak −69° 202 a
Progenitor type	B3 supergiant
Colour (B-V)	+0.085
Notable features	The closest recorded sn. since invention of telescope
Peak apparent magnitude	+3
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