We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sunny DaytimeWhat's Visible Now?
All Constellations » Centaurus » 

1 Centauri

Altitude: 5.2°   Azimuth: 173.2°   Direction: South

1 Centauri is a variable sub-giant star in the constellation of Centaurus.

1 Centauri visual magnitude is 4.23. Because of its moderate brightness, 1 Centauri should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about 1 Centauri:


1 Centauri is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 5.2°
Azimuth: 173.2°
Direction: South

Celestial coordinates and finder chart of 1 Centauri

1 Centauri 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 1 Centauri are provided in the following table:

13h 45m 41s
-33° 02’ 38”

The simplified sky map below shows the position of 1 Centauri in the sky:

Finder chart 1 Centauri star
Simplified finder chart for 1 Centauri.

Visibility of 1 Centauri from your location

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

Today's 1 Centauri rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 123.0°
Max altitude: 5.5°
Azimuth: 237.0°

Digitized Sky Survey image of 1 Centauri

The image below is a photograph of 1 Centauri 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 1 Centauri is -0.462 arcsec per year in Right Ascension and -0.146 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of 1 Centauri star
DSS2 image of 1 Centauri. The red arrow shows the motion of 1 Centauri during the next 1000 years (-7.70 arcmin in Right Ascension and -2.43 arcmin in declination);

Distance of 1 Centauri from the Sun and relative movement

1 Centauri is distant 62.80 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

19.26 pc
62.80 ly
-22 km/s
-0.462 arcsec/year
-0.146 arcsec/year

Spectral properties of 1 Centauri

1 Centauri belongs to spectral class F3 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where 1 Centauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 1 Centauri. Attribution: Richard Powell / CC BY-SA

Alternative designations of 1 Centauri

Gl 525.1