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public LocationGreenwich, UK
Sunrise: 4:59 
Transit: 13:04 
Sunset: 21:08
sunny   (Daytime)   What's Visible Now?
All Constellations » Orion » 

51 Orionis

Above the horizon.  Rise: 5:07 | Tran: 11:12 | Set: 17:18
Alt: 16.82°   Az: 250.34°   Direction: West-South-West

51 Orionis is a giant star of spectral class K1 in the constellation of Orion.

51 Orionis visual magnitude is 4.91. Because of its moderate brightness, 51 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.

51 Orionis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year.

Image of 51 Orionis star
DSS2 image of 51 Orionis. The red arrow shows the motion of 51 Orionis during the next 10000 years (-9.67 arcmin in Right Ascension and -2.50 arcmin in declination);

Celestial Coordinates


05h 43m 44s
+01° 29’ 05”
04h 17m 32s


05h 42m 28s
+01° 28’ 28”

Galactic Coordinates


Finder Chart

Finder chart 51 Orionis star
Simplified finder chart for 51 Orionis.

Magnitude, Color, Spectral Class



The red dot in the diagram below shows where 51 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 51 Orionis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

51 Orionis is distant 301.85 light years from the Sun and it is moving far from the Sun at the speed of 88 kilometers per second.

92.59 pc
301.85 ly
88 km/s
-0.058 arcsec/y
-0.015 "/y

Alternative Designations


Visibility from Your Location

Today's 51 Orionis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.5°
Max altitude: 40.0°
Azimuth: 271.5°