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All Constellations » Triangulum Australe » 

Atria - α Trianguli Australis (alpha Trianguli Australis)

Below the horizon.  Never rises today
Alt: -72.40°   Az: 178.69°   Direction: South

Atria, also designated as α Trianguli Australis (alpha Trianguli Australis), is a bright giant star of spectral class K2 in the constellation of Triangulum Australe.

Atria visual magnitude is 1.92, making it the 41th brightest star in the sky. Because of its brightness, Atria is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

Image of Atria - α Trianguli Australis (alpha Trianguli Australis) star
DSS2 image of Atria. The red arrow shows the motion of Atria during the next 10000 years (2.33 arcmin in Right Ascension and -5.67 arcmin in declination);

Celestial Coordinates

Apparent

16h 51m 20s
-69° 04’ 11”
12h 04m 26s
04h 55m 47s

J2000

16h 48m 39s
-69° 01’ 40”

Galactic Coordinates

321.54°
-15.26°

Finder Chart

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Finder chart for Atria - α Trianguli Australis (alpha Trianguli Australis).

Magnitude, Color, Spectral Class

1.92
Bright giant

-3.61
K2II
3886K

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

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

Distance, Radial Speed, Proper Motion

Atria is distant 415.29 light years from the Sun and it is moving towards the Sun at the speed of 3 kilometers per second.

127.39
415.29
-3 km/s
0.014 arcsec/y
-0.034"/y

Alternative Designations

Atria
α Trianguli Australis
(alpha Trianguli Australis)
SAO253700
SAO253700

Visibility from Your Location

Atria - α Trianguli Australis (alpha Trianguli Australis) is currently not visible from Greenwich, UK