Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:44 
Transit: 13:00 
Sunset: 21:16
warning Set your observing location to get relevant data
wb_twilight   (Astronomical Twilight)  
Planets Visible Tonight
Planets Visible Tonight
 • 
What's Visible Now • Tonight Sky
Search  close
All Constellations » Sagittarius » 

η Sagittarii (eta Sagittarii)

Above the horizon.  Rise: 0:28 | Tran: 1:52 | Set: 3:13
Alt: 1.64°   Az: 184.37°   Direction: South

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.

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);

Celestial Coordinates

Apparent

18h 19m 21s
-36° 45’ 00”
00h 21m 49s
18h 41m 10s

J2000

18h 17m 37s
-36° 45’ 42”

Galactic Coordinates

356.44°
-9.68°

Finder Chart

loader
  Loading map...
Finder chart for η Sagittarii (eta Sagittarii).

Magnitude, Color, Spectral Class

3.11
Giant

-0.19
M3III
3705K

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:

3.11
8.01
4.9
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
149.06
1 km/s
-0.128 arcsec/y
-0.167"/y

Alternative Designations

η Sagittarii
(eta Sagittarii)
SAO209957
SAO209957

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°