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🌎  Greenwich, United Kingdom [change]

η Gruis (eta Gruis)

η Gruis is a double giant star in the constellation of Grus.

η Gruis visual magnitude is 4.85. Because of its moderate brightness, η Gruis 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 η Gruis:

4.85
Giant
η Gruis (eta Gruis) is below the horizon from Greenwich, United Kingdom [change].

Celestial coordinates and finder chart of η Gruis

η Gruis is situated south of the celestial equator, as such, it is more easily visible from the southern emisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of η Gruis are provided in the following table:

22h 45m 37s
-53° 30’ 01”
335.6°
-54.9°
Grus

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

Finder chart η Gruis (eta Gruis) star
Simplified finder chart for η Gruis (eta Gruis).

Visibility of η Gruis from your location

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

η Gruis (eta Gruis) is currently not visible from Greenwich, United Kingdom [change]

Digitized Sky Survey image of η Gruis

The image below is a photograph of η 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 η Gruis is 0.029 arcsec per year in Right Ascension and 0.014 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of η Gruis (eta Gruis) star
DSS2 image of η Gruis. The red arrow shows the motion of η Gruis during the next 10000 years (4.83 arcmin in Right Ascension and 2.33 arcmin in declination);

Distance of η Gruis from the Sun and relative movement

η Gruis is distant 394.20 light years from the Sun and it is moving far from the Sun at the speed of 28 kilometers per second.

120.92 pc
394.20 ly
28 km/s
0.029 arcsec/year
0.014 arcsec/year

Spectral properties of η Gruis

η Gruis belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.

-0.56
K2III
4348K

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

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

η Gruis star system properties

η 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 η Gruis double sysyem:

4.85
11.45
6.6
24.4 arcsec

Alternative designations of η Gruis

η Gruis
(eta Gruis)
SAO247570
SAO247570