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public LocationGreenwich, United Kingdom
TimezoneEurope/London
Sunrise: 4:42 
Transit: 12:58 
Sunset: 21:15
sunny   (Daytime)   What's Visible Now?

4 Herculis

Above the horizon.  Circumpolar today
Altitude: 20.5°   Azimuth: 46.3°   Direction: North-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.

Celestial coordinates and finder chart of 4 Herculis

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

4 Herculis is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 4 Herculis are provided in the following table:

15h 55m 30s
+42° 33’ 57”
67.77°
49.78°
Hercules
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);

Key facts about 4 Herculis

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 of 4 Herculis from the Sun and relative movement

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 pc
481.54 ly
-17 km/s
-0.025 arcsec/year
0.015 arcsec/year

Alternative designations of 4 Herculis

SAO45790
SAO45790

Visibility of 4 Herculis from your location

4 Herculis is circumpolar and transits at 22:20 UTC (altitude: 81.1°)