Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:48  
clear_day Transit: 12:56  
SunsetSet: 21:05 south
wb_twilight Nautical TwilightWhat's Visible Now
All Constellations » Hercules » 

Marsic - κ Herculis (kappa Herculis)

Marsic, also designated as κ Herculis (kappa Herculis), is a variable and multiple giant star in the constellation of Hercules.

Marsic visual magnitude is 5. Because of its moderate brightness, Marsic should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about Marsic:

Marsic - κ Herculis (kappa Herculis) is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 41°.

Celestial coordinates and finder chart of Marsic

Marsic 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 Marsic are provided in the following table:

16h 08m 04s
+17° 02’ 48”

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

Finder chart Marsic - κ Herculis (kappa Herculis) star
Simplified finder chart for Marsic - κ Herculis (kappa Herculis).

Visibility of Marsic 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 Marsic - κ Herculis (kappa 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: 73.0°
Max altitude: 55.6°
Azimuth: 287.0°
Marsic - κ Herculis (kappa Herculis) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of Marsic

The image below is a photograph of Marsic 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 Marsic is -0.032 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of Marsic - κ Herculis (kappa Herculis) star
DSS2 image of Marsic. The red arrow shows the motion of Marsic during the next 10000 years (-5.33 arcmin in Right Ascension and -1.17 arcmin in declination);

Distance of Marsic from the Sun and relative movement

Marsic is distant 388.10 light years from the Sun and it is moving towards the Sun at the speed of 11 kilometers per second.

119.05 pc
388.10 ly
-11 km/s
-0.032 arcsec/year
-0.007 arcsec/year

Spectral properties of Marsic

Marsic belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.


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

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

Marsic star system properties

Marsic is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the Marsic double sysyem:

28.1 arcsec

Alternative designations of Marsic

κ Herculis
(kappa Herculis)