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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
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All Constellations » Ophiuchus » 

37 Ophiuchi

Altitude: 9.6°   Azimuth: 274.9°   Direction: West

37 Ophiuchi is a double giant star in the constellation of Ophiuchus.

37 Ophiuchi visual magnitude is 5.33. Because of its reltive faintness, 37 Ophiuchi 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 37 Ophiuchi:


37 Ophiuchi is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.6°
Azimuth: 274.9°
Direction: West

Celestial coordinates and finder chart of 37 Ophiuchi

37 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 37 Ophiuchi are provided in the following table:

17h 12m 27s
+10° 35’ 07”

The simplified sky map below shows the position of 37 Ophiuchi in the sky:

Finder chart 37 Ophiuchi star
Simplified finder chart for 37 Ophiuchi.

Visibility of 37 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 37 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: 79.4°
Max altitude: 49.1°
Azimuth: 280.6°

Digitized Sky Survey image of 37 Ophiuchi

The image below is a photograph of 37 Ophiuchi 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 37 Ophiuchi is 0.001 arcsec per year in Right Ascension and -0.026 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 37 Ophiuchi star
DSS2 image of 37 Ophiuchi. The red arrow shows the motion of 37 Ophiuchi during the next 10000 years (0.17 arcmin in Right Ascension and -4.33 arcmin in declination);

Distance of 37 Ophiuchi from the Sun and relative movement

37 Ophiuchi is distant 776.19 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

238.10 pc
776.19 ly
26 km/s
0.001 arcsec/year
-0.026 arcsec/year

Spectral properties of 37 Ophiuchi

37 Ophiuchi belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where 37 Ophiuchi is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 37 Ophiuchi. Attribution: Richard Powell / CC BY-SA

37 Ophiuchi star system properties

37 Ophiuchi 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 37 Ophiuchi double sysyem:

30.3 arcsec

Alternative designations of 37 Ophiuchi

37 Ophiuchi