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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:48  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Hercules » 

Kornephoros - β Herculis (beta Herculis)

Altitude: -12.9°   Azimuth: 333.0°   Direction: North-North-West

Kornephoros, also designated as β Herculis (beta Herculis), is a variable and double giant star in the constellation of Hercules.

Kornephoros visual magnitude is 2.77. Thanks to its high brightness, Kornephoros is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about Kornephoros:


Kornephoros - β Herculis (beta Herculis) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -12.9°
Azimuth: 333.0°
Direction: North-North-West

Celestial coordinates and finder chart of Kornephoros

Kornephoros is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Kornephoros are provided in the following table:

16h 30m 13s
+21° 29’ 22”

The simplified sky map below shows the position of Kornephoros in the sky:

Finder chart Kornephoros - β Herculis (beta Herculis) star
Simplified finder chart for Kornephoros - β Herculis (beta Herculis).

Visibility of Kornephoros from your location

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

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

Azimuth: 68.5°
Max altitude: 60.0°
Azimuth: 291.5°

Digitized Sky Survey image of Kornephoros

The image below is a photograph of Kornephoros 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 Kornephoros is -0.098 arcsec per year in Right Ascension and -0.015 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Kornephoros - β Herculis (beta Herculis) star
DSS2 image of Kornephoros. The red arrow shows the motion of Kornephoros during the next 1000 years (-1.63 arcmin in Right Ascension and -0.25 arcmin in declination);

Distance of Kornephoros from the Sun and relative movement

Kornephoros is distant 147.71 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

45.31 pc
147.71 ly
-26 km/s
-0.098 arcsec/year
-0.015 arcsec/year

Spectral properties of Kornephoros

Kornephoros belongs to spectral class G7 and has a luminosity class of III corresponding to a giant star.


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

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

Kornephoros star system properties

Kornephoros is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the Kornephoros double sysyem:

256.2 arcsec

Alternative designations of Kornephoros

β Herculis
(beta Herculis)
27 Herculis