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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: 6:40  
clear_day Transit: 12:10  
SunsetSet: 17:41
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All Constellations » Grus » 

Tiaki - β Gruis (beta Gruis)

Altitude: -8.7°   Azimuth: 173.8°   Direction: South

Tiaki, also designated as β Gruis (beta Gruis), is a variable giant star in the constellation of Grus.

Tiaki visual magnitude is 2.1, making it the 60th brightest star in the sky. Thanks to its high brightness, Tiaki is clearly visible when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

The proper motion of Tiaki is 0.137 arcsec per year in Right Ascension and -0.008 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Tiaki - β Gruis (beta Gruis) star
DSS2 image of Tiaki. The red arrow shows the motion of Tiaki during the next 1000 years (2.28 arcmin in Right Ascension and -0.13 arcmin in declination);

Key facts about Tiaki


Tiaki - β Gruis (beta Gruis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -8.7°
Azimuth: 173.8°
Direction: South

Celestial coordinates and finder chart of Tiaki

Tiaki 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 Tiaki are provided in the following table:

22h 42m 40s
-46° 53’ 04”

The simplified sky map below shows the position of Tiaki in the sky:

Finder chart Tiaki - β Gruis (beta Gruis) star
Simplified finder chart for Tiaki - β Gruis (beta Gruis).

Visibility of Tiaki from your location

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

Tiaki - β Gruis (beta Gruis) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of Tiaki from the Sun and relative movement

Tiaki is distant 170.06 light years from the Sun and it is moving far from the Sun at the speed of 2 kilometers per second.

52.16 pc
170.06 ly
2 km/s
0.137 arcsec/year
-0.008 arcsec/year

Spectral properties of Tiaki

Tiaki belongs to spectral class M5 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of Tiaki

β Gruis
(beta Gruis)