Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
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clear_day Transit: 12:56  
SunsetSet: 21:07 south
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All Constellations » Grus » 

σ2 Gruis (sigma2 Gruis)

σ2 Gruis is a double main-sequence star in the constellation of Grus.

σ2 Gruis visual magnitude is 5.86. Because of its reltive faintness, σ2 Gruis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about σ2 Gruis:

σ2 Gruis (sigma2 Gruis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of σ2 Gruis

σ2 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 σ2 Gruis are provided in the following table:

22h 36m 58s
-40° 35’ 27”

The simplified sky map below shows the position of σ2 Gruis in the sky:

Finder chart σ2 Gruis (sigma2 Gruis) star
Simplified finder chart for σ2 Gruis (sigma2 Gruis).

Visibility of σ2 Gruis from your location

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

σ2 Gruis (sigma2 Gruis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of σ2 Gruis

The image below is a photograph of σ2 Gruis 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 σ2 Gruis is 0.038 arcsec per year in Right Ascension and -0.075 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of σ2 Gruis (sigma2 Gruis) star
DSS2 image of σ2 Gruis. The red arrow shows the motion of σ2 Gruis during the next 10000 years (6.33 arcmin in Right Ascension and -12.50 arcmin in declination);

Distance of σ2 Gruis from the Sun and relative movement

σ2 Gruis is distant 219.38 light years from the Sun and it is moving far from the Sun at the speed of 15 kilometers per second.

67.29 pc
219.38 ly
15 km/s
0.038 arcsec/year
-0.075 arcsec/year

Spectral properties of σ2 Gruis

σ2 Gruis belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where σ2 Gruis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of σ2 Gruis. Attribution: Richard Powell / CC BY-SA

σ2 Gruis star system properties

σ2 Gruis is a visual double star which can be observed with the help of medium or large telescopes. The table below shows key information about the σ2 Gruis double sysyem:

2.8 arcsec

Alternative designations of σ2 Gruis

σ2 Gruis
(sigma2 Gruis)