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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:44  
clear_day Transit: 12:10  
SunsetSet: 17:38
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All Constellations » Centaurus » 

Rigil Kentaurus or Toliman - α1 Centauri (alpha1 Centauri)

Altitude: -55.8°   Azimuth: 130.2°   Direction: South-East

Rigil Kentaurus or Toliman, also designated as α1 Centauri (alpha1 Centauri), is a multiple main-sequence star in the constellation of Centaurus.

Rigil Kentaurus or Toliman visual magnitude is -0.01. Thanks to its high brightness, Rigil Kentaurus or Toliman is clearly visible when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

The proper motion of Rigil Kentaurus or Toliman is -3.642 arcsec per year in Right Ascension and 0.699 arcsec per year in Declination and the associated displacement for the next 100 years is represented with the red arrow.

Image of Rigil Kentaurus or Toliman - α1 Centauri (alpha1 Centauri) star
DSS2 image of Rigil Kentaurus or Toliman. The red arrow shows the motion of Rigil Kentaurus or Toliman during the next 100 years (-6.07 arcmin in Right Ascension and 1.17 arcmin in declination);

Key facts about Rigil Kentaurus or Toliman

-0.01
Main-sequence

Rigil Kentaurus or Toliman - α1 Centauri (alpha1 Centauri) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -55.8°
Azimuth: 130.2°
Direction: South-East

Celestial coordinates and finder chart of Rigil Kentaurus or Toliman

Rigil Kentaurus or Toliman is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Rigil Kentaurus or Toliman are provided in the following table:

14h 39m 35s
-60° 50’ 07”
315.78°
-0.71°
Centaurus

The simplified sky map below shows the position of Rigil Kentaurus or Toliman in the sky:

Finder chart Rigil Kentaurus or Toliman - α1 Centauri (alpha1 Centauri) star
Simplified finder chart for Rigil Kentaurus or Toliman - α1 Centauri (alpha1 Centauri).

Visibility of Rigil Kentaurus or Toliman from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Rigil Kentaurus or Toliman - α1 Centauri (alpha1 Centauri) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of Rigil Kentaurus or Toliman from the Sun and relative movement

Rigil Kentaurus or Toliman is distant 4.39 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

1.35 pc
4.39 ly
-22 km/s
-3.642 arcsec/year
0.699 arcsec/year

Spectral properties of Rigil Kentaurus or Toliman

Rigil Kentaurus or Toliman belongs to spectral class G2 and has a luminosity class of V corresponding to a main-sequence star.

4.34
G2V
5568K

The red dot in the diagram below shows where Rigil Kentaurus or Toliman is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of Rigil Kentaurus or Toliman. Attribution: Richard Powell / CC BY-SA

Rigil Kentaurus or Toliman star system properties

Rigil Kentaurus or Toliman is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the Rigil Kentaurus or Toliman double sysyem:

-0.01
1.39
1.4
20.9 arcsec

Alternative designations of Rigil Kentaurus or Toliman

Rigil Kentaurus or Toliman
α1 Centauri
(alpha1 Centauri)
SAO252838
SAO252838
Gl 559 A