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public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 7:19 
Transit: 12:14 
Sunset: 17:09
wb_twilight   (Civil Twilight)  
What's Visible Now • Tonight Timeline
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All Constellations » Hercules » 

102 Herculis

Below the horizon.  Rise: 0:47 | Tran: 8:39 | Set: 16:30
Alt: -5.56°   Az: 314.08°   Direction: North-West

102 Herculis is a double sub-giant star of spectral class B2 in the constellation of Hercules.

102 Herculis visual magnitude is 4.36. Because of its moderate brightness, 102 Herculis 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.

Image of 102 Herculis star
DSS2 image of 102 Herculis. The red arrow shows the motion of 102 Herculis during the next 100000 years (-1.67 arcmin in Right Ascension and -8.33 arcmin in declination);

Celestial Coordinates

Apparent

18h 09m 49s
+20° 49’ 12”
08h 40m 23s
02h 50m 13s

J2000

18h 08m 45s
+20° 48’ 51”

Galactic Coordinates

47.42°
18.42°

Finder Chart

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Finder chart for 102 Herculis.

Magnitude, Color, Spectral Class

4.36
Sub-giant

-3.99
B2IV
12692K

The red dot in the diagram below shows where 102 Herculis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 102 Herculis. Attribution: Richard Powell / CC BY-SA

Star System Properties

102 Herculis 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 102 Herculis double sysyem:

4.36
12.26
7.9
23.4 arcsec

Distance, Radial Speed, Proper Motion

102 Herculis is distant 1,523.36 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

467.29
1,523.36
-15 km/s
-0.001 arcsec/y
-0.005"/y

Alternative Designations

102 Herculis
SAO85769
SAO85769

Visibility from Your Location

Today's 102 Herculis rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 69.2°
Max altitude: 59.3°
Azimuth: 290.8°