ο Ophiuchi (omicron Ophiuchi)

Above the horizon. Rise: 17:10 | Tran: 22:38 | Set: 4:02

Alt: 27.53° Az: 131.36° Direction: South-East

ο Ophiuchi is a double sub-giant star of spectral class F6 in the constellation of Ophiuchus.

ο Ophiuchi visual magnitude is 6.8. Because of its faintness, ο Ophiuchi is not visible to the naked eye.

Image of ο Ophiuchi (omicron Ophiuchi) star

DSS2 image of ο Ophiuchi. The red arrow shows the motion of ο Ophiuchi during the next 10000 years (-12.17 arcmin in Right Ascension and -1.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 17h 19m 34s

Declination -24° 18’ 34”

Hour Angle 20h 52m 20s

Sidereal Time 14h 11m 55s

J2000

Right Ascension 17h 18m 00s

Declination -24° 17’ 03”

Galactic Coordinates

Galactic Longitude 0.55°

Galactic Latitude 7.71°

Finder Chart

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Finder chart for ο Ophiuchi (omicron Ophiuchi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.8

Class Sub-giant

Absolute magnitude 0.96

Spectral Type F6IV

Color Index (B-V) 0.51

Temperature 6344K

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

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

Star System Properties

ο Ophiuchi is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the ο Ophiuchi double sysyem:

Main star magnitude 6.8

Secondary star magnitude 8.3

Magnitude difference 1.5

Separation 10.2 arcsec

Distance, Radial Speed, Proper Motion

ο Ophiuchi is distant 480.83 light years from the Sun and it is moving towards the Sun at the speed of 28 kilometers per second.

Distance (parsec) 147.49

Distance (light year) 480.83

Radial Speed -28 km/s

Proper Motion RA -0.073 arcsec/y

Proper Motion Dec -0.009"/y

Alternative Designations

Bayer designation ο Ophiuchi
(omicron Ophiuchi)

Flamsteed designation 39 Ophiuchi

Henry Draper Catalogue HD156350

SAO Catalogue SAO185237

Hipparcos Catalogue HIP84625

Durchmusterung Catalogue CD-2413255

Aitken Double Star Catalogue ADS10442

Visibility from Your Location

Today's ο Ophiuchi (omicron Ophiuchi) rise, transit and set times from Bairoa, Puerto Rico are the following (all times relative to the local timezone America/Puerto_Rico):

Azimuth: 114.3° RISE 17:10

Max altitude: 47.4° TRANSIT 22:38

Azimuth: 245.7° SET 4:02

Name:	Bairoa, Puerto Rico
Latitude:	18° 15' 32.8" N
Longitude:	66° 2' 25.4" W
Timezone:	America/Puerto_Rico

Set Location

Other stars in Ophiuchus