Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:46  
clear_day Transit: 12:56  
SunsetSet: 21:07 south
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All Constellations » Grus » 

π1 Gruis (pi1 Gruis)

π1 Gruis is a variable and double star in the constellation of Grus.

π1 Gruis visual magnitude is 6.62. Because of its reltive faintness, π1 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 π1 Gruis:

π1 Gruis (pi1 Gruis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of π1 Gruis

π1 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 π1 Gruis are provided in the following table:

22h 22m 43s
-45° 56’ 52”

The simplified sky map below shows the position of π1 Gruis in the sky:

Finder chart π1 Gruis (pi1 Gruis) star
Simplified finder chart for π1 Gruis (pi1 Gruis).

Visibility of π1 Gruis from your location

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

π1 Gruis (pi1 Gruis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of π1 Gruis

The image below is a photograph of π1 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 π1 Gruis is 0.007 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of π1 Gruis (pi1 Gruis) star
DSS2 image of π1 Gruis. The red arrow shows the motion of π1 Gruis during the next 10000 years (1.17 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of π1 Gruis from the Sun and relative movement

π1 Gruis is distant 498.47 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

152.91 pc
498.47 ly
-20 km/s
0.007 arcsec/year
-0.012 arcsec/year

Spectral properties of π1 Gruis

π1 Gruis belongs to spectral class S5


The red dot in the diagram below shows where π1 Gruis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of π1 Gruis. Attribution: Richard Powell / CC BY-SA

π1 Gruis star system properties

π1 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 π1 Gruis double sysyem:

2.7 arcsec

Alternative designations of π1 Gruis

π1 Gruis
(pi1 Gruis)