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public LocationGreenwich, UK
Sunrise: 4:57 
Transit: 13:04 
Sunset: 21:10
wb_twilight   (Nautical Twilight)   What's Visible Now?
All Constellations » Sagittarius » 

η Sagittarii (eta Sagittarii)

Below the horizon.  Rise: 22:31 | Tran: 23:52 | Set: 1:16
Altitude: -0.8°   Azimuth: 160.7°   Direction: South-South-East

η Sagittarii is a variable and multiple giant star of spectral class M3 in the constellation of Sagittarius.

η Sagittarii visual magnitude is 3.11. Because of its moderate brightness, η Sagittarii is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

η Sagittarii is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere.

Image of η Sagittarii (eta Sagittarii) star
DSS2 image of η Sagittarii. The red arrow shows the motion of η Sagittarii during the next 1000 years (-2.13 arcmin in Right Ascension and -2.78 arcmin in declination);

Apparent Coordinates

18h 19m 17s
-36° 45’ 02”

J2000 Coordinates

18h 17m 37s
-36° 45’ 42”

Galactic Coordinates


Finder Chart

Finder chart η Sagittarii (eta Sagittarii) star
Simplified finder chart for η Sagittarii (eta Sagittarii).

Magnitude, Color, Spectral Class



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

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

Star System Properties

η Sagittarii is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the η Sagittarii double sysyem:

3.5 arcsec

Distance, Radial Speed, Proper Motion

η Sagittarii is distant 149.06 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

45.72 pc
149.06 ly
1 km/s
-0.128 arcsec/y
-0.167 "/y

Alternative Designations

η Sagittarii
(eta Sagittarii)

Visibility from Your Location

Today's η Sagittarii (eta Sagittarii) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 126.8°
Max altitude: 1.8°
Azimuth: 233.2°