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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:02 
Transit: 12:56 
Sunset: 20:51
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All Constellations » Hercules » 

51 Herculis

Above the horizon.  Rise: 17:39 | Tran: 2:01 | Set: 10:18
Alt: 25.60°   Az: 278.03°   Direction: West

51 Herculis is a hypergiant star of spectral class K0 in the constellation of Hercules.

51 Herculis visual magnitude is 5.04. Because of its faintness, 51 Herculis 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 51 Herculis star
DSS2 image of 51 Herculis. The red arrow shows the motion of 51 Herculis during the next 10000 years (1.83 arcmin in Right Ascension and 1.00 arcmin in declination);

Celestial Coordinates

Apparent

16h 52m 48s
+24° 36’ 54”
05h 16m 46s
22h 09m 35s

J2000

16h 51m 45s
+24° 39’ 23”

Galactic Coordinates

44.73°
36.42°

Finder Chart

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Finder chart for 51 Herculis.

Magnitude, Color, Spectral Class

5.04
Hypergiant

-1.79
K0III
4213K

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

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

Distance, Radial Speed, Proper Motion

51 Herculis is distant 758.14 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

232.56
758.14
-16 km/s
0.011 arcsec/y
0.006"/y

Alternative Designations

51 Herculis
SAO84651
SAO84651

Visibility from Your Location

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

Azimuth: 65.4°
Max altitude: 63.1°
Azimuth: 294.6°