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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: 7:01  
clear_day Transit: 12:12  
SunsetSet: 17:24
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All Constellations » Centaurus » 

ρ Centauri (rho Centauri)

Altitude: -85.7°   Azimuth: 104.6°   Direction: East-South-East

ρ Centauri is a main-sequence star in the constellation of Centaurus.

ρ Centauri visual magnitude is 3.96. Because of its moderate brightness, ρ 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 proper motion of ρ Centauri is -0.035 arcsec per year in Right Ascension and -0.016 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ρ Centauri (rho Centauri) star
DSS2 image of ρ Centauri. The red arrow shows the motion of ρ Centauri during the next 10000 years (-5.83 arcmin in Right Ascension and -2.67 arcmin in declination);

Key facts about ρ Centauri


ρ Centauri (rho Centauri) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -85.7°
Azimuth: 104.6°
Direction: East-South-East

Celestial coordinates and finder chart of ρ Centauri

ρ 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 ρ Centauri are provided in the following table:

12h 11m 39s
-52° 22’ 06”

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

Finder chart ρ Centauri (rho Centauri) star
Simplified finder chart for ρ Centauri (rho Centauri).

Visibility of ρ Centauri from your location

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

ρ Centauri (rho Centauri) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of ρ Centauri from the Sun and relative movement

ρ Centauri is distant 342.08 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

104.93 pc
342.08 ly
15 km/s
-0.035 arcsec/year
-0.016 arcsec/year

Spectral properties of ρ Centauri

ρ Centauri belongs to spectral class B3 and has a luminosity class of V corresponding to a main-sequence star.


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

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

Alternative designations of ρ Centauri

ρ Centauri
(rho Centauri)