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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: 6:48  
clear_day Transit: 12:11  
SunsetSet: 17:34
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All Constellations » Ara » 

ε1 Arae (epsilon1 Arae)

Altitude: -54.1°   Azimuth: 117.1°   Direction: East-South-East

ε1 Arae is a giant star in the constellation of Ara.

ε1 Arae visual magnitude is 4.06. Because of its moderate brightness, ε1 Arae should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of ε1 Arae is 0.004 arcsec per year in Right Ascension and 0.017 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ε1 Arae (epsilon1 Arae) star
DSS2 image of ε1 Arae. The red arrow shows the motion of ε1 Arae during the next 10000 years (0.67 arcmin in Right Ascension and 2.83 arcmin in declination);

Key facts about ε1 Arae


ε1 Arae (epsilon1 Arae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -54.1°
Azimuth: 117.1°
Direction: East-South-East

Celestial coordinates and finder chart of ε1 Arae

ε1 Arae 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 ε1 Arae are provided in the following table:

16h 59m 35s
-53° 09’ 38”

The simplified sky map below shows the position of ε1 Arae in the sky:

Finder chart ε1 Arae (epsilon1 Arae) star
Simplified finder chart for ε1 Arae (epsilon1 Arae).

Visibility of ε1 Arae from your location

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

ε1 Arae (epsilon1 Arae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Distance of ε1 Arae from the Sun and relative movement

ε1 Arae is distant 304.10 light years from the Sun and it is moving far from the Sun at the speed of 23 kilometers per second.

93.28 pc
304.10 ly
23 km/s
0.004 arcsec/year
0.017 arcsec/year

Spectral properties of ε1 Arae

ε1 Arae belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where ε1 Arae is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ε1 Arae. Attribution: Richard Powell / CC BY-SA

Alternative designations of ε1 Arae

ε1 Arae
(epsilon1 Arae)