δ1 Gruis (delta1 Gruis)

Below the horizon. Never rises today

Alt: -20.87° Az: 225.49° Direction: South-West

δ1 Gruis is a variable and double giant star of spectral class G6 in the constellation of Grus.

δ1 Gruis visual magnitude is 3.97. Because of its moderate brightness, δ1 Gruis is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of δ1 Gruis. The red arrow shows the motion of δ1 Gruis during the next 10000 years (4.67 arcmin in Right Ascension and -0.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 22h 30m 44s

Declination -43° 22’ 05”

Hour Angle 04h 25m 44s

Sideral Time 02h 56m 28s

J2000

Right Ascension 22h 29m 16s

Declination -43° 29’ 44”

Galactic Coordinates

Galactic Longitude 353.77°

Galactic Latitude -57.05°

Finder Chart

Simplified finder chart for δ1 Gruis (delta1 Gruis).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 3.97

Class Giant

Absolute magnitude -0.82

Spectral Type G6III

Color Index (B-V) 1.03

Temperature 4672K

The red dot in the diagram below shows where δ1 Gruis is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of δ1 Gruis. Attribution: Richard Powell / CC BY-SA

Star System Properties

δ1 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 δ1 Gruis double sysyem:

Main star magnitude 3.97

Secondary star magnitude 12.77

Magnitude difference 8.8

Separation 5.6 arcsec

Distance, Radial Speed, Proper Motion

δ1 Gruis is distant 295.56 light years from the Sun and it is moving far from the Sun at the speed of 5 kilometers per second.

Distance (parsec) 90.66

Distance (light year) 295.56

Radial Speed 5 km/s

Proper Motion RA 0.028 arcsec/y

Proper Motion Dec -0.005"/y

Alternative Designations

Bayer designation δ1 Gruis
(delta1 Gruis)

Henry Draper Catalogue HD213009

SAO Catalogue SAO231154

Hipparcos Catalogue HIP110997

Durchmusterung Catalogue CD-4414931

FK5 Catalogue 846

General Catalogue of Variable Stars 14169

Visibility from Your Location

δ1 Gruis (delta1 Gruis) is currently not visible from Greenwich, UK

Set Location

Other stars in Grus