109 Herculis is a variable and double giant star in the constellation of Hercules.
109 Herculis visual magnitude is 3.84. Because of its moderate brightness, 109 Herculis should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.
The table below summarizes the key facts about 109 Herculis:
Celestial coordinates and finder chart of 109 Herculis
109 Herculis is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of 109 Herculis are provided in the following table:
The simplified sky map below shows the position of 109 Herculis in the sky:
Visibility of 109 Herculis from your location
Digitized Sky Survey image of 109 Herculis
The image below is a photograph of 109 Herculis from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of 109 Herculis is 0.196 arcsec per year in Right Ascension and -0.242 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.
Distance of 109 Herculis from the Sun and relative movement
109 Herculis is distant 128.35 light years from the Sun and it is moving towards the Sun at the speed of 58 kilometers per second.
Spectral properties of 109 Herculis
109 Herculis belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.
The red dot in the diagram below shows where 109 Herculis is situated in the Hertzsprung–Russell diagram.
109 Herculis star system properties
109 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 109 Herculis double sysyem: