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public LocationGreenwich, United Kingdom
Sunrise: 4:42 
Transit: 12:59 
Sunset: 21:17
sunny   (Daytime)   What's Visible Now?

100 Herculis

Above the horizon.  Rise: 16:51 | Tran: 1:24 | Set: 9:53
Altitude: 42.0°   Azimuth: 259.6°   Direction: West

100 Herculis is a variable and multiple main-sequence star of spectral class A3 in the constellation of Hercules.

100 Herculis visual magnitude is 5.9. Because of its faintness, 100 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 100 Herculis

Finder chart 100 Herculis star
Simplified finder chart for 100 Herculis.

100 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 100 Herculis are provided in the following table:

18h 07m 49s
+26° 05’ 51”
Image of 100 Herculis star
DSS2 image of 100 Herculis. The red arrow shows the motion of 100 Herculis during the next 10000 years (-0.33 arcmin in Right Ascension and 5.50 arcmin in declination);

Key facts about 100 Herculis


and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 100 Herculis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 100 Herculis. Attribution: Richard Powell / CC BY-SA

Distance of 100 Herculis from the Sun and relative movement

100 Herculis is distant 165.90 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

50.89 pc
165.90 ly
-16 km/s
-0.002 arcsec/year
0.033 arcsec/year

Alternative designations of 100 Herculis

100 Herculis

Visibility of 100 Herculis from your location

Today's 100 Herculis rise, transit and set times from Greenwich, United Kingdom are the following (all times relative to the local timezone Europe/London):

Azimuth: 63.9°
Max altitude: 64.6°
Azimuth: 296.1°