ω Ophiuchi (omega Ophiuchi)

Below the horizon. Rise: 15:39 | Tran: 22:20 | Set: 5:04

Alt: -27.15° Az: 133.98° Direction: South-West

ω Ophiuchi is a variable star of spectral class A7 in the constellation of Ophiuchus.

ω Ophiuchi visual magnitude is 4.45. Because of its moderate brightness, ω Ophiuchi is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

Image of ω Ophiuchi (omega Ophiuchi) star

DSS2 image of ω Ophiuchi. The red arrow shows the motion of ω Ophiuchi during the next 10000 years (4.67 arcmin in Right Ascension and 6.50 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 33m 38s

Declination -21° 31’ 08”

Hour Angle 14h 53m 57s

Sidereal Time 07h 27m 36s

J2000

Right Ascension 16h 32m 08s

Declination -21° 27’ 59”

Galactic Coordinates

Galactic Longitude 356.3°

Galactic Latitude 17.83°

Finder Chart

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Finder chart for ω Ophiuchi (omega Ophiuchi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.45

Class

Absolute magnitude 0.80

Spectral Type A7

Color Index (B-V) 0.13

Temperature 8748K

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

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

Distance, Radial Speed, Proper Motion

ω Ophiuchi is distant 174.71 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 53.59

Distance (light year) 174.71

Radial Speed 3 km/s

Proper Motion RA 0.028 arcsec/y

Proper Motion Dec 0.039"/y

Alternative Designations

Bayer designation ω Ophiuchi
(omega Ophiuchi)

Flamsteed designation 9 Ophiuchi

Henry Draper Catalogue HD148898

SAO Catalogue SAO184450

Hipparcos Catalogue HIP80975

Durchmusterung Catalogue BD-21 4381

FK5 Catalogue 3307

General Catalogue of Variable Stars Ome Oph

Visibility from Your Location

Today's ω Ophiuchi (omega Ophiuchi) rise, transit and set times from Macia, Mozambique are the following (all times relative to the local timezone Africa/Maputo):

Azimuth: 111.5° RISE 15:39

Max altitude: 86.5° TRANSIT 22:20

Azimuth: 248.5° SET 5:04

Name:	Macia, Mozambique
Latitude:	25° 1' 36.8" S
Longitude:	33° 5' 56.0" E
Timezone:	Africa/Maputo

Set Location

Other stars in Ophiuchus