Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:12 
Transit: 12:56 
Sunset: 20:41
warning Set your observing location to get relevant data
Search  close
All Constellations » Sagittarius » 

ο Sagittarii (omicron Sagittarii)

Below the horizon.  Rise: 0:38 | Tran: 4:41 | Set: 8:40
Alt: -44.84°   Az: 294.32°   Direction: West-North-West

ο Sagittarii is a variable and double giant star of spectral class G9 in the constellation of Sagittarius.

ο Sagittarii visual magnitude is 3.77. Because of its moderate brightness, ο 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 ο Sagittarii (omicron Sagittarii) star
DSS2 image of ο Sagittarii. The red arrow shows the motion of ο Sagittarii during the next 10000 years (13.33 arcmin in Right Ascension and -10.00 arcmin in declination);

Celestial Coordinates

Apparent

19h 06m 11s
-21° 42’ 06”
09h 03m 44s
04h 09m 56s

J2000

19h 04m 41s
-21° 44’ 30”

Galactic Coordinates

14.71°
-12.51°

Finder Chart

loader
  Loading map...
Finder chart for ο Sagittarii (omicron Sagittarii).

Magnitude, Color, Spectral Class

3.77
Giant

0.62
G9III
4719K

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

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

Star System Properties

ο Sagittarii 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 ο Sagittarii double sysyem:

3.77
13.67
9.9
35.7 arcsec

Distance, Radial Speed, Proper Motion

ο Sagittarii is distant 138.78 light years from the Sun and it is moving far from the Sun at the speed of 25 kilometers per second.

42.57
138.78
25 km/s
0.08 arcsec/y
-0.06"/y

Alternative Designations

ο Sagittarii
(omicron Sagittarii)
39 Sagittarii
SAO187643
SAO187643

Visibility from Your Location

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

Azimuth: 111.7°
Max altitude: 16.8°
Azimuth: 248.3°