37 Ophiuchi

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:

Color of 37 Ophiuchi ⬤

Magnitude of 37 Ophiuchi 5.33

Class Giant

VISIBILITY RIGHT NOW 37 Ophiuchi is below the horizon from Greenwich, United Kingdom [change].

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:

Right Ascension J2000 17h 12m 27s

Declination J2000 +10° 35’ 07”

Galactic Longitude 31.38°

Galactic Latitude 26.74°

Constellation Ophiuchus

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

Simplified finder chart for 37 Ophiuchi.

Visibility of 37 Ophiuchi from your location

Location: Greenwich, United Kingdom [change]
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 [change] are the following (all times relative to the local timezone Europe/London):

Azimuth: 79.4° RISE 22:55

Max altitude: 49.1° TRANSIT 5:51

Azimuth: 280.6° SET 12:43

RIGHT NOW 37 Ophiuchi is below the horizon from Greenwich, United Kingdom

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.

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.

Distance (parsec) 238.10 pc

Distance (light year) 776.19 ly

Heliocentric radial velocity 26 km/s

Proper Motion RA 0.001 arcsec/year

Proper Motion Dec -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.

Absolute magnitude -1.55

Spectral Type M2III

Color Index (B-V) 1.59

Temperature of 37 Ophiuchi 3663K

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

Main star magnitude 5.33

Secondary star magnitude 14.03

Magnitude difference 8.7

Separation 30.3 arcsec

Alternative designations of 37 Ophiuchi

Flamsteed designation 37 Ophiuchi

Henry Draper Catalogue HD155644

SAO Catalogue SAO102646

Hipparcos Catalogue HIP84177

Durchmusterung Catalogue BD+10 3165

FK5 Catalogue 3369

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Other stars in Ophiuchus