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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: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
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All Constellations » Sagittarius » 

Kaus Australis - ε Sagittarii (epsilon Sagittarii)

Altitude: -67.0°   Azimuth: 50.3°   Direction: North-East

Kaus Australis, also designated as ε Sagittarii (epsilon Sagittarii), is a double giant star in the constellation of Sagittarius.

Kaus Australis visual magnitude is 1.85, making it the 36th brightest star in the sky. Thanks to its high brightness, Kaus Australis 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 Kaus Australis:


Kaus Australis - ε Sagittarii (epsilon Sagittarii) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -67.0°
Azimuth: 50.3°
Direction: North-East

Celestial coordinates and finder chart of Kaus Australis

Kaus Australis 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 Kaus Australis are provided in the following table:

18h 24m 10s
-34° 23’ 04”

The simplified sky map below shows the position of Kaus Australis in the sky:

Finder chart Kaus Australis - ε Sagittarii (epsilon Sagittarii) star
Simplified finder chart for Kaus Australis - ε Sagittarii (epsilon Sagittarii).

Visibility of Kaus Australis from your location

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

Today's Kaus Australis - ε Sagittarii (epsilon Sagittarii) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 124.4°
Max altitude: 4.1°
Azimuth: 235.6°

Digitized Sky Survey image of Kaus Australis

The image below is a photograph of Kaus Australis 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 Kaus Australis is -0.038 arcsec per year in Right Ascension and -0.124 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Kaus Australis - ε Sagittarii (epsilon Sagittarii) star
DSS2 image of Kaus Australis. The red arrow shows the motion of Kaus Australis during the next 1000 years (-0.63 arcmin in Right Ascension and -2.07 arcmin in declination);

Distance of Kaus Australis from the Sun and relative movement

Kaus Australis is distant 144.57 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

44.35 pc
144.57 ly
-15 km/s
-0.038 arcsec/year
-0.124 arcsec/year

Spectral properties of Kaus Australis

Kaus Australis belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.


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

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

Kaus Australis star system properties

Kaus Australis is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Kaus Australis double sysyem:

36.1 arcsec

Alternative designations of Kaus Australis

Kaus Australis
ε Sagittarii
(epsilon Sagittarii)
20 Sagittarii