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A Complete Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
SunriseRise: 6:42  
clear_day Transit: 12:10  
SunsetSet: 17:40
sleep NighttimeWhat's Visible Now?
All Constellations » Hercules » 

Sarin - δ Herculis (delta Herculis)

Altitude: 13.1°   Azimuth: 66.4°   Direction: East-North-East

Sarin, also designated as δ Herculis (delta Herculis), is a variable and multiple sub-giant star in the constellation of Hercules.

Sarin visual magnitude is 3.14. Because of its moderate brightness, Sarin should be easily visible from locations with dark skies, while it can be barely visible, or not visible at all, from skies affected by light pollution.

The proper motion of Sarin is -0.021 arcsec per year in Right Ascension and -0.157 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of Sarin - δ Herculis (delta Herculis) star
DSS2 image of Sarin. The red arrow shows the motion of Sarin during the next 1000 years (-0.35 arcmin in Right Ascension and -2.62 arcmin in declination);

Key facts about Sarin


Sarin - δ Herculis (delta Herculis) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.1°
Azimuth: 66.4°
Direction: East-North-East

Celestial coordinates and finder chart of Sarin

Sarin 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 Sarin are provided in the following table:

17h 15m 01s
+24° 50’ 21”

The simplified sky map below shows the position of Sarin in the sky:

Finder chart Sarin - δ Herculis (delta Herculis) star
Simplified finder chart for Sarin - δ Herculis (delta Herculis).

Visibility of Sarin from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

Today's Sarin - δ Herculis (delta Herculis) rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 65.2°
Max altitude: 63.4°
Azimuth: 294.8°

Distance of Sarin from the Sun and relative movement

Sarin is distant 78.46 light years from the Sun and it is moving towards the Sun at the speed of 40 kilometers per second.

24.07 pc
78.46 ly
-40 km/s
-0.021 arcsec/year
-0.157 arcsec/year

Spectral properties of Sarin

Sarin belongs to spectral class A3 and has a luminosity class of IV corresponding to a sub-giant star.


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

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

Sarin star system properties

Sarin is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the Sarin double sysyem:

8.5 arcsec

Alternative designations of Sarin

δ Herculis
(delta Herculis)
65 Herculis
NN 3995 A