We use cookies to deliver essential features and to measure their performance. Learn more.
Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:17 
Transit: 11:44 
Sunset: 16:10
sunny   (Daytime)  
What's Visible Now • Tonight Timeline
Search  close
All Constellations » Hercules » 

4 Herculis

Above the horizon.  Circumpolar today
Alt: 67.89°   Az: 102.14°   Direction: East-South-East

4 Herculis is a variable star of spectral class B9 in the constellation of Hercules.

4 Herculis visual magnitude is 5.75. Because of its faintness, 4 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 4 Herculis star
DSS2 image of 4 Herculis. The red arrow shows the motion of 4 Herculis during the next 10000 years (-4.17 arcmin in Right Ascension and 2.50 arcmin in declination);

Celestial Coordinates

Apparent

15h 56m 20s
+42° 29’ 41”
22h 00m 14s
13h 56m 35s

J2000

15h 55m 30s
+42° 33’ 57”

Galactic Coordinates

67.77°
49.78°

Finder Chart

Finder chart 4 Herculis star
Simplified finder chart for 4 Herculis.

Magnitude, Color, Spectral Class

5.75

-0.10
B9
11744K

The red dot in the diagram below shows where 4 Herculis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 4 Herculis. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

4 Herculis is distant 481.54 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

147.71
481.54
-17 km/s
-0.025 arcsec/y
0.015"/y

Alternative Designations

SAO45790
SAO45790

Visibility from Your Location

4 Herculis is circumpolar and transits at 12:19 UTC (altitude: 81.0°)