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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
north SunriseRise: 7:37  
clear_day Transit: 11:46  
SunsetSet: 15:55 south
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All Constellations » Centaurus » 

Hadar - β Centauri (beta Centauri)

Altitude: -35.8°   Azimuth: 215.5°   Direction: South-West

Hadar, also designated as β Centauri (beta Centauri), is a variable and double giant star in the constellation of Centaurus.

Hadar visual magnitude is 0.61, making it the 11th brightest star in the sky. Thanks to its high brightness, Hadar is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Hadar:


Hadar - β Centauri (beta Centauri) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -35.8°
Azimuth: 215.5°
Direction: South-West

Celestial coordinates and finder chart of Hadar

Hadar 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 Hadar are provided in the following table:

14h 03m 49s
-60° 22’ 23”

The simplified sky map below shows the position of Hadar in the sky:

Finder chart Hadar - β Centauri (beta Centauri) star
Simplified finder chart for Hadar - β Centauri (beta Centauri).

Visibility of Hadar from your location

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

Hadar - β Centauri (beta Centauri) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of Hadar

The image below is a photograph of Hadar from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of Hadar is -0.032 arcsec per year in Right Ascension and -0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Hadar - β Centauri (beta Centauri) star
DSS2 image of Hadar. The red arrow shows the motion of Hadar during the next 10000 years (-5.33 arcmin in Right Ascension and -3.17 arcmin in declination);

Distance of Hadar from the Sun and relative movement

Hadar is distant 524.96 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

161.03 pc
524.96 ly
6 km/s
-0.032 arcsec/year
-0.019 arcsec/year

Spectral properties of Hadar

Hadar belongs to spectral class B1 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where Hadar is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of Hadar. Attribution: Richard Powell / CC BY-SA

Hadar star system properties

Hadar is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the Hadar double sysyem:

1.3 arcsec

Alternative designations of Hadar

β Centauri
(beta Centauri)