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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
SunriseRise: 6:38  
clear_day Transit: 12:10  
SunsetSet: 17:43
sleep NighttimeWhat's Visible Now?
All Constellations » Ophiuchus » 

κ Ophiuchi (kappa Ophiuchi)

Altitude: -15.2°   Azimuth: 52.3°   Direction: North-East

κ Ophiuchi is a variable giant star in the constellation of Ophiuchus.

κ Ophiuchi visual magnitude is 3.2. Because of its moderate brightness, κ Ophiuchi should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of κ Ophiuchi is -0.291 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of κ Ophiuchi (kappa Ophiuchi) star
DSS2 image of κ Ophiuchi. The red arrow shows the motion of κ Ophiuchi during the next 1000 years (-4.85 arcmin in Right Ascension and -0.17 arcmin in declination);

Key facts about κ Ophiuchi


κ Ophiuchi (kappa Ophiuchi) is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -15.2°
Azimuth: 52.3°
Direction: North-East

Celestial coordinates and finder chart of κ Ophiuchi

κ Ophiuchi 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 κ Ophiuchi are provided in the following table:

16h 57m 40s
+09° 22’ 30”

The simplified sky map below shows the position of κ Ophiuchi in the sky:

Finder chart κ Ophiuchi (kappa Ophiuchi) star
Simplified finder chart for κ Ophiuchi (kappa Ophiuchi).

Visibility of κ Ophiuchi 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 κ Ophiuchi (kappa Ophiuchi) 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: 80.6°
Max altitude: 47.9°
Azimuth: 279.4°

Distance of κ Ophiuchi from the Sun and relative movement

κ Ophiuchi is distant 85.81 light years from the Sun and it is moving towards the Sun at the speed of 56 kilometers per second.

26.32 pc
85.81 ly
-56 km/s
-0.291 arcsec/year
-0.01 arcsec/year

Spectral properties of κ Ophiuchi

κ Ophiuchi belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


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

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

Alternative designations of κ Ophiuchi

κ Ophiuchi
(kappa Ophiuchi)
27 Ophiuchi