We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sleep NighttimeWhat's Visible Now?
All Constellations » Hercules » 

77 Herculis

Altitude: 24.8°   Azimuth: 317.6°   Direction: North-West

77 Herculis is a main-sequence star in the constellation of Hercules.

77 Herculis visual magnitude is 5.85. Because of its reltive faintness, 77 Herculis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 77 Herculis:


77 Herculis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 24.8°
Azimuth: 317.6°
Direction: North-West

Celestial coordinates and finder chart of 77 Herculis

77 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 77 Herculis are provided in the following table:

17h 26m 44s
+48° 15’ 35”

The simplified sky map below shows the position of 77 Herculis in the sky:

Finder chart 77 Herculis star
Simplified finder chart for 77 Herculis.

Visibility of 77 Herculis from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

77 Herculis is circumpolar and transits at 12:26 UTC (altitude: 86.8°)

Digitized Sky Survey image of 77 Herculis

The image below is a photograph of 77 Herculis from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 77 Herculis is 0.002 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of 77 Herculis star
DSS2 image of 77 Herculis. The red arrow shows the motion of 77 Herculis during the next 100000 years (3.33 arcmin in Right Ascension and -6.67 arcmin in declination);

Distance of 77 Herculis from the Sun and relative movement

77 Herculis is distant 363.03 light years from the Sun and it is moving towards the Sun at the speed of 9 kilometers per second.

111.36 pc
363.03 ly
-9 km/s
0.002 arcsec/year
-0.004 arcsec/year

Spectral properties of 77 Herculis

77 Herculis belongs to spectral class A4 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where 77 Herculis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 77 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 77 Herculis

77 Herculis