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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 6:31 
Transit: 12:56 
Sunset: 19:19
sunny   (Daytime)  
What's Visible Now • Tonight Timeline
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All Constellations » Orion » 

ο2 Orionis (omicron2 Orionis)

Above the horizon.  Rise: 23:18 | Tran: 6:30 | Set: 13:39
Alt: 50.98°   Az: 197.67°   Direction: South-South-West

ο2 Orionis is a multiple giant star of spectral class K2 in the constellation of Orion.

ο2 Orionis visual magnitude is 4.07. Because of its moderate brightness, ο2 Orionis 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 ο2 Orionis (omicron2 Orionis) star
DSS2 image of ο2 Orionis. The red arrow shows the motion of ο2 Orionis during the next 10000 years (-12.33 arcmin in Right Ascension and -7.83 arcmin in declination);

Celestial Coordinates

Apparent

04h 57m 45s
+13° 33’ 06”
00h 45m 20s
05h 43m 05s

J2000

04h 56m 22s
+13° 30’ 51”

Galactic Coordinates

186.63°
-18.05°

Finder Chart

Finder chart ο2 Orionis (omicron2 Orionis) star
Simplified finder chart for ο2 Orionis (omicron2 Orionis).

Magnitude, Color, Spectral Class

4.07
Giant

0.49
K2III
4409K

The red dot in the diagram below shows where ο2 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of ο2 Orionis. Attribution: Richard Powell / CC BY-SA

Star System Properties

ο2 Orionis 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 ο2 Orionis double sysyem:

4.07
11.57
7.5
100.4 arcsec

Distance, Radial Speed, Proper Motion

ο2 Orionis is distant 169.26 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

51.92
169.26
1 km/s
-0.074 arcsec/y
-0.047"/y

Alternative Designations

ο2 Orionis
(omicron2 Orionis)
SAO94218
SAO94218

Visibility from Your Location

Today's ο2 Orionis (omicron2 Orionis) rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 76.4°
Max altitude: 52.1°
Azimuth: 283.6°