12 Ophiuchi

Above the horizon. Rise: 19:47 | Tran: 1:38 | Set: 7:24

Alt: 22.72° Az: 233.27° Direction: South-West

12 Ophiuchi is a variable main-sequence star of spectral class K2 in the constellation of Ophiuchus.

12 Ophiuchi visual magnitude is 5.75. Because of its faintness, 12 Ophiuchi is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of 12 Ophiuchi. The red arrow shows the motion of 12 Ophiuchi during the next 1000 years (7.63 arcmin in Right Ascension and -5.17 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 16h 37m 40s

Declination -02° 22’ 29”

Hour Angle 03h 10m 53s

Sidereal Time 19h 48m 34s

J2000

Right Ascension 16h 36m 21s

Declination -02° 19’ 28”

Galactic Coordinates

Galactic Longitude 13.73°

Galactic Latitude 28.42°

Finder Chart

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Finder chart for 12 Ophiuchi.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.75

Class Main-sequence

Absolute magnitude 5.80

Spectral Type K2V

Color Index (B-V) 0.82

Temperature 5221K

The red dot in the diagram below shows where 12 Ophiuchi is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 12 Ophiuchi. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

12 Ophiuchi is distant 31.88 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 9.78

Distance (light year) 31.88

Radial Speed -15 km/s

Proper Motion RA 0.458 arcsec/y

Proper Motion Dec -0.31"/y

Alternative Designations

Flamsteed designation 12 Ophiuchi

Henry Draper Catalogue HD149661

SAO Catalogue SAO141269

Hipparcos Catalogue HIP81300

Durchmusterung Catalogue BD-02 4211

Gliese Catalogue Gl 631

FK5 Catalogue 1433

General Catalogue of Variable Stars V2133 Oph

Visibility from Your Location

Today's 12 Ophiuchi rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 92.4° RISE 19:47

Max altitude: 36.1° TRANSIT 1:38

Azimuth: 267.6° SET 7:24

Set Location

Other stars in Ophiuchus