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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
north SunriseRise: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Ara » 

β Arae (beta Arae)

Altitude: -17.1°   Azimuth: 176.9°   Direction: South

β Arae is a supergiant star in the constellation of Ara.

β Arae visual magnitude is 2.85. Thanks to its high brightness, β Arae is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about β Arae:


β Arae (beta Arae) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -17.1°
Azimuth: 176.9°
Direction: South

Celestial coordinates and finder chart of β Arae

β 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 β Arae are provided in the following table:

17h 25m 18s
-55° 31’ 48”

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

Finder chart β Arae (beta Arae) star
Simplified finder chart for β Arae (beta Arae).

Visibility of β Arae from your location

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

β Arae (beta Arae) is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of β Arae

The image below is a photograph of β Arae 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 β Arae is -0.008 arcsec per year in Right Ascension and -0.025 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of β Arae (beta Arae) star
DSS2 image of β Arae. The red arrow shows the motion of β Arae during the next 10000 years (-1.33 arcmin in Right Ascension and -4.17 arcmin in declination);

Distance of β Arae from the Sun and relative movement

β Arae is distant 602.59 light years from the Sun

184.84 pc
602.59 ly
-0.008 arcsec/year
-0.025 arcsec/year

Spectral properties of β Arae

β Arae belongs to spectral class K3 and has a luminosity class of I corresponding to a supergiant star.


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

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

Alternative designations of β Arae

β Arae
(beta Arae)