68 Ophiuchi

Above the horizon. Rise: 21:26 | Tran: 3:34 | Set: 9:39

Alt: 32.53° Az: 220.73° Direction: South-West

68 Ophiuchi is a variable and double main-sequence star of spectral class A2 in the constellation of Ophiuchus.

68 Ophiuchi visual magnitude is 4.45. Because of its moderate brightness, 68 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.

DSS2 image of 68 Ophiuchi. The red arrow shows the motion of 68 Ophiuchi during the next 10000 years (2.50 arcmin in Right Ascension and -2.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 18h 03m 02s

Declination +01° 18’ 24”

Hour Angle 02h 13m 33s

Sidereal Time 20h 16m 36s

J2000

Right Ascension 18h 01m 45s

Declination +01° 18’ 19”

Galactic Coordinates

Galactic Longitude 28.38°

Galactic Latitude 11.64°

Finder Chart

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Finder chart for 68 Ophiuchi.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.45

Class Main-sequence

Absolute magnitude -0.10

Spectral Type A2V

Color Index (B-V) 0.02

Temperature 9882K

The red dot in the diagram below shows where 68 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 68 Ophiuchi. Attribution: Richard Powell / CC BY-SA

Star System Properties

68 Ophiuchi is a visual double star which can be observed with the help of large telescopes. The table below shows key information about the 68 Ophiuchi double sysyem:

Main star magnitude 4.45

Secondary star magnitude 6.95

Magnitude difference 2.5

Separation 0.6 arcsec

Distance, Radial Speed, Proper Motion

68 Ophiuchi is distant 264.83 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

Distance (parsec) 81.23

Distance (light year) 264.83

Radial Speed 6 km/s

Proper Motion RA 0.015 arcsec/y

Proper Motion Dec -0.012"/y

Alternative Designations

Flamsteed designation 68 Ophiuchi

Henry Draper Catalogue HD164577

SAO Catalogue SAO123035

Hipparcos Catalogue HIP88290

Durchmusterung Catalogue BD+01 3560

General Catalogue of Variable Stars 10009

Aitken Double Star Catalogue ADS10990

Visibility from Your Location

Today's 68 Ophiuchi rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 88.7° RISE 21:26

Max altitude: 39.8° TRANSIT 3:34

Azimuth: 271.3° SET 9:39

Set Location

Other stars in Ophiuchus