Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:54  
clear_day Transit: 12:49  
SunsetSet: 18:43 south
sunny DaytimeWhat's Visible Now
All Constellations » Hercules » 

47 Herculis

Altitude: 37.2°   Azimuth: 134.5°   Direction: South-East

47 Herculis is a variable star in the constellation of Hercules.

47 Herculis visual magnitude is 5.49. Because of its reltive faintness, 47 Herculis should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 47 Herculis:


47 Herculis is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 37.2°
Azimuth: 134.5°
Direction: South-East

Celestial coordinates and finder chart of 47 Herculis

47 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 47 Herculis are provided in the following table:

16h 50m 19s
+07° 14’ 52”

The simplified sky map below shows the position of 47 Herculis in the sky:

Finder chart 47 Herculis star
Simplified finder chart for 47 Herculis.

Visibility of 47 Herculis 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 47 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: 82.8°
Max altitude: 45.8°
Azimuth: 277.2°

Digitized Sky Survey image of 47 Herculis

The image below is a photograph of 47 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 47 Herculis is 0.053 arcsec per year in Right Ascension and -0.011 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of 47 Herculis star
DSS2 image of 47 Herculis. The red arrow shows the motion of 47 Herculis during the next 10000 years (8.83 arcmin in Right Ascension and -1.83 arcmin in declination);

Distance of 47 Herculis from the Sun and relative movement

47 Herculis is distant 188.44 light years from the Sun and it is moving towards the Sun at the speed of 4 kilometers per second.

57.80 pc
188.44 ly
-4 km/s
0.053 arcsec/year
-0.011 arcsec/year

Spectral properties of 47 Herculis

47 Herculis belongs to spectral class A3


The red dot in the diagram below shows where 47 Herculis is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of 47 Herculis. Attribution: Richard Powell / CC BY-SA

Alternative designations of 47 Herculis

47 Herculis