μ Ophiuchi (mu Ophiuchi)

Below the horizon. Rise: 7:15 | Tran: 12:32 | Set: 17:49

Alt: -37.24° Az: 312.04° Direction: North-West

μ Ophiuchi is a bright giant star of spectral class B8 in the constellation of Ophiuchus.

μ Ophiuchi visual magnitude is 4.62. Because of its moderate brightness, μ 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 μ Ophiuchi. The red arrow shows the motion of μ Ophiuchi during the next 10000 years (-1.50 arcmin in Right Ascension and -2.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 17h 39m 12s

Declination -08° 07’ 54”

Hour Angle 09h 33m 19s

Sidereal Time 03h 12m 31s

J2000

Right Ascension 17h 37m 50s

Declination -08° 07’ 08”

Galactic Coordinates

Galactic Longitude 17°

Galactic Latitude 12.34°

Finder Chart

Loading map...

Finder chart for μ Ophiuchi (mu Ophiuchi).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.62

Class Bright giant

μ Ophiuchi is also a Mn chemically peculiar star.

Absolute magnitude -1.51

Spectral Type B8II

Color Index (B-V) 0.11

Temperature 8932K

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

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

Distance, Radial Speed, Proper Motion

μ Ophiuchi is distant 548.82 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

Distance (parsec) 168.35

Distance (light year) 548.82

Radial Speed -19 km/s

Proper Motion RA -0.009 arcsec/y

Proper Motion Dec -0.017"/y

Alternative Designations

Bayer designation μ Ophiuchi
(mu Ophiuchi)

Flamsteed designation 57 Ophiuchi

Henry Draper Catalogue HD159975

SAO Catalogue SAO141772

Hipparcos Catalogue HIP86284

Durchmusterung Catalogue BD-08 4472

FK5 Catalogue 3399

Visibility from Your Location

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

Azimuth: 98.1° RISE 7:15

Max altitude: 30.4° TRANSIT 12:32

Azimuth: 261.9° SET 17:49

Set Location

Other stars in Ophiuchus