Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:47  
clear_day Transit: 12:56  
SunsetSet: 21:06 south
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All Constellations » Centaurus » 

υ1 Centauri (upsilon1 Centauri)

υ1 Centauri is a sub-giant star in the constellation of Centaurus.

υ1 Centauri visual magnitude is 3.87. Because of its moderate brightness, υ1 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 υ1 Centauri:

υ1 Centauri (upsilon1 Centauri) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of υ1 Centauri

υ1 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 υ1 Centauri are provided in the following table:

13h 58m 40s
-44° 48’ 12”

The simplified sky map below shows the position of υ1 Centauri in the sky:

Finder chart υ1 Centauri (upsilon1 Centauri) star
Simplified finder chart for υ1 Centauri (upsilon1 Centauri).

Visibility of υ1 Centauri from your location

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

υ1 Centauri (upsilon1 Centauri) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of υ1 Centauri

The image below is a photograph of υ1 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 υ1 Centauri is -0.025 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of υ1 Centauri (upsilon1 Centauri) star
DSS2 image of υ1 Centauri. The red arrow shows the motion of υ1 Centauri during the next 10000 years (-4.17 arcmin in Right Ascension and -4.00 arcmin in declination);

Distance of υ1 Centauri from the Sun and relative movement

υ1 Centauri is distant 417.41 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

128.04 pc
417.41 ly
5 km/s
-0.025 arcsec/year
-0.024 arcsec/year

Spectral properties of υ1 Centauri

υ1 Centauri belongs to spectral class B2 and has a luminosity class of IV corresponding to a sub-giant star.


The red dot in the diagram below shows where υ1 Centauri is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of υ1 Centauri. Attribution: Richard Powell / CC BY-SA

Alternative designations of υ1 Centauri

υ1 Centauri
(upsilon1 Centauri)