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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:06 
Transit: 12:13 
Sunset: 17:21
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All Constellations » Scorpius » 

18 Scorpii

Above the horizon.  Rise: 1:03 | Tran: 6:19 | Set: 11:34
Alt: 24.87°   Az: 147.33°   Direction: South-South-East

18 Scorpii is a variable and double main-sequence star of spectral class G2 in the constellation of Scorpius.

18 Scorpii visual magnitude is 5.5. Because of its faintness, 18 Scorpii 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 18 Scorpii star
DSS2 image of 18 Scorpii. The red arrow shows the motion of 18 Scorpii during the next 1000 years (3.90 arcmin in Right Ascension and -8.35 arcmin in declination);

Celestial Coordinates

Apparent

16h 16m 59s
-08° 25’ 50”
22h 01m 17s
14h 18m 17s

J2000

16h 15m 37s
-08° 22’ 09”

Galactic Coordinates

4.7°
29.16°

Finder Chart

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Finder chart for 18 Scorpii.

Magnitude, Color, Spectral Class

5.5
Main-sequence

4.77
G2V
5778K

The red dot in the diagram below shows where 18 Scorpii is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of 18 Scorpii. Attribution: Richard Powell / CC BY-SA

Star System Properties

18 Scorpii is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 18 Scorpii double sysyem:

5.5
13.2
7.7
25.8 arcsec

Distance, Radial Speed, Proper Motion

18 Scorpii is distant 45.72 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

14.03
45.72
11 km/s
0.234 arcsec/y
-0.501"/y

Alternative Designations

SAO141066
SAO141066

Visibility from Your Location

Today's 18 Scorpii rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 98.4°
Max altitude: 30.1°
Azimuth: 261.6°