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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: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sleep NighttimeWhat's Visible Now?
All Constellations » Ophiuchus » 

Guniibuu - 36 Ophiuchi

Altitude: -63.2°   Azimuth: 333.0°   Direction: North-North-West

Guniibuu, also designated as 36 Ophiuchi , is a multiple hypergiant star in the constellation of Ophiuchus.

Guniibuu visual magnitude is 5.07. Because of its reltive faintness, Guniibuu 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 Guniibuu:


Guniibuu - 36 Ophiuchi is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -63.2°
Azimuth: 333.0°
Direction: North-North-West

Celestial coordinates and finder chart of Guniibuu

Guniibuu is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of Guniibuu are provided in the following table:

17h 15m 20s
-26° 36’ 05”

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

Finder chart Guniibuu - 36 Ophiuchi star
Simplified finder chart for Guniibuu - 36 Ophiuchi.

Visibility of Guniibuu 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 Guniibuu - 36 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: 116.6°
Max altitude: 11.9°
Azimuth: 243.4°

Digitized Sky Survey image of Guniibuu

The image below is a photograph of Guniibuu 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 Guniibuu is -0.491 arcsec per year in Right Ascension and -1.133 arcsec per year in Declination and the associated displacement for the next 100 years is represented with the red arrow.

Image of Guniibuu - 36 Ophiuchi star
DSS2 image of Guniibuu. The red arrow shows the motion of Guniibuu during the next 100 years (-0.82 arcmin in Right Ascension and -1.89 arcmin in declination);

Distance of Guniibuu from the Sun and relative movement

Guniibuu is distant 19.51 light years from the Sun and it is moving towards the Sun at the speed of 1 kilometers per second.

5.99 pc
19.51 ly
-1 km/s
-0.491 arcsec/year
-1.133 arcsec/year

Spectral properties of Guniibuu

Guniibuu belongs to spectral class K0 and has a luminosity class of V corresponding to a hypergiant star.


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

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

Alternative designations of Guniibuu

36 Ophiuchi
Gl 663 A