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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 5:12 
Transit: 12:56 
Sunset: 20:41
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All Constellations » Ophiuchus » 

23 Ophiuchi

Above the horizon.  Rise: 21:00 | Tran: 2:31 | Set: 7:58
Alt: 26.60°   Az: 214.62°   Direction: South-West

23 Ophiuchi is a giant star of spectral class K2 in the constellation of Ophiuchus.

23 Ophiuchi visual magnitude is 5.25. Because of its faintness, 23 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.

Image of 23 Ophiuchi star
DSS2 image of 23 Ophiuchi. The red arrow shows the motion of 23 Ophiuchi during the next 10000 years (-5.17 arcmin in Right Ascension and -3.33 arcmin in declination);

Celestial Coordinates

Apparent

16h 55m 57s
-06° 11’ 35”
02h 02m 55s
18h 58m 52s

J2000

16h 54m 35s
-06° 09’ 14”

Galactic Coordinates

12.89°
22.52°

Finder Chart

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Finder chart for 23 Ophiuchi.

Magnitude, Color, Spectral Class

5.25
Giant

0.84
K2III
4559K

The red dot in the diagram below shows where 23 Ophiuchi is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 23 Ophiuchi. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

23 Ophiuchi is distant 248.10 light years from the Sun and it is moving towards the Sun at the speed of 17 kilometers per second.

76.10
248.10
-17 km/s
-0.031 arcsec/y
-0.02"/y

Alternative Designations

23 Ophiuchi
SAO141431
SAO141431

Visibility from Your Location

Today's 23 Ophiuchi rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 96.2°
Max altitude: 32.3°
Azimuth: 263.8°