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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: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
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All Constellations » Grus » 

ρ Gruis (rho Gruis)

Altitude: -3.5°   Azimuth: 188.9°   Direction: South

ρ Gruis is a double hypergiant star in the constellation of Grus.

ρ Gruis visual magnitude is 4.85. Because of its moderate brightness, ρ Gruis should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of ρ Gruis is 0.006 arcsec per year in Right Ascension and -0.095 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of ρ Gruis (rho Gruis) star
DSS2 image of ρ Gruis. The red arrow shows the motion of ρ Gruis during the next 1000 years (0.10 arcmin in Right Ascension and -1.58 arcmin in declination);

Key facts about ρ Gruis


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

Altitude: -3.5°
Azimuth: 188.9°
Direction: South

Celestial coordinates and finder chart of ρ Gruis

ρ Gruis 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 Gruis are provided in the following table:

22h 43m 30s
-41° 24’ 51”

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

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

Visibility of ρ Gruis from your location

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

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

Distance of ρ Gruis from the Sun and relative movement

ρ Gruis is distant 221.62 light years from the Sun and it is moving far from the Sun at the speed of 29 kilometers per second.

67.98 pc
221.62 ly
29 km/s
0.006 arcsec/year
-0.095 arcsec/year

Spectral properties of ρ Gruis

ρ Gruis belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


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

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

ρ Gruis star system properties

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

14.2 arcsec

Alternative designations of ρ Gruis

ρ Gruis
(rho Gruis)