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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:54 
Transit: 12:57 
Sunset: 21:00
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All Constellations » Orion » 

21 Orionis

Above the horizon.  Rise: 7:48 | Tran: 13:59 | Set: 20:10
Alt: 15.19°   Az: 254.63°   Direction: West-South-West

21 Orionis is a variable bright giant star of spectral class F5 in the constellation of Orion.

21 Orionis visual magnitude is 5.34. Because of its faintness, 21 Orionis is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

Image of 21 Orionis star
DSS2 image of 21 Orionis. The red arrow shows the motion of 21 Orionis during the next 10000 years (-2.83 arcmin in Right Ascension and -7.83 arcmin in declination);

Celestial Coordinates

Apparent

05h 20m 30s
+02° 37’ 13”
04h 34m 41s
09h 55m 12s

J2000

05h 19m 11s
+02° 35’ 44”

Galactic Coordinates

199.54°
-19.12°

Finder Chart

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Finder chart for 21 Orionis.

Magnitude, Color, Spectral Class

5.34
Bright giant

1.42
F5II
6827K

The red dot in the diagram below shows where 21 Orionis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 21 Orionis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

21 Orionis is distant 197.94 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

60.72
197.94
11 km/s
-0.017 arcsec/y
-0.047"/y

Alternative Designations

SAO112624
SAO112624

Visibility from Your Location

Today's 21 Orionis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 87.4°
Max altitude: 41.1°
Azimuth: 272.6°