Home
Search Objects
Major Solar System Objects
Comets
Asteroids
Spacecrafts
Star Maps
Orbits
public  Greenwich, UK Greenwich, UK  ⓘ
TimezoneEurope/London
Sunrise: 4:44 
Transit: 13:02 
Sunset: 21:19
warning Set your observing location to get relevant data
Search  close
All Constellations » Hercules » 

ι Herculis (iota Herculis)

Above the horizon.  Circumpolar today
Alt: 36.73°   Az: 59.76°   Direction: South-West

ι Herculis is a variable and double sub-giant star of spectral class B3 in the constellation of Hercules.

ι Herculis visual magnitude is 3.8. Because of its moderate brightness, ι 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 ι Herculis (iota Herculis) star
DSS2 image of ι Herculis. The red arrow shows the motion of ι Herculis during the next 100000 years (-8.33 arcmin in Right Ascension and 8.33 arcmin in declination);

Celestial Coordinates

Apparent

17h 40m 11s
+45° 59’ 38”
18h 18m 41s
11h 58m 53s

J2000

17h 39m 27s
+46° 00’ 23”

Galactic Coordinates

72.32°
31.27°

Finder Chart

loader
  Loading map...
Finder chart for ι Herculis (iota Herculis).

Magnitude, Color, Spectral Class

3.8
Sub-giant

-2.11
B3IV
13121K

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

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

Star System Properties

ι 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 ι Herculis double sysyem:

3.8
12.1
8.3
116 arcsec

Distance, Radial Speed, Proper Motion

ι Herculis is distant 495.44 light years from the Sun and it is moving towards the Sun at the speed of 20 kilometers per second.

151.98
495.44
-20 km/s
-0.005 arcsec/y
0.005"/y

Alternative Designations

ι Herculis
(iota Herculis)
85 Herculis
SAO46872
SAO46872

Visibility from Your Location

ι Herculis (iota Herculis) is circumpolar and transits at 23:34 UTC (altitude: 84.5°)