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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
north SunriseRise: 7:41  
clear_day Transit: 11:47  
SunsetSet: 15:53 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Hercules » 


Altitude: 9.7°   Azimuth: 71.2°   Direction: East-North-East

HR6642 is a main-sequence star in the constellation of Hercules.

HR6642 visual magnitude is 6.12. Because of its reltive faintness, HR6642 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 HR6642:


HR6642 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.7°
Azimuth: 71.2°
Direction: East-North-East

Celestial coordinates and finder chart of HR6642

HR6642 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 HR6642 are provided in the following table:

17h 48m 47s
+19° 15’ 19”

The simplified sky map below shows the position of HR6642 in the sky:

Finder chart HR6642 star
Simplified finder chart for HR6642.

Visibility of HR6642 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 HR6642 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: 70.7°
Max altitude: 57.8°
Azimuth: 289.3°

Digitized Sky Survey image of HR6642

The image below is a photograph of HR6642 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 HR6642 is -0.006 arcsec per year in Right Ascension and 0.022 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6642 star
DSS2 image of HR6642. The red arrow shows the motion of HR6642 during the next 10000 years (-1.00 arcmin in Right Ascension and 3.67 arcmin in declination);

Distance of HR6642 from the Sun and relative movement

HR6642 is distant 611.63 light years from the Sun and it is moving towards the Sun at the speed of 25 kilometers per second.

187.62 pc
611.63 ly
-25 km/s
-0.006 arcsec/year
0.022 arcsec/year

Spectral properties of HR6642

HR6642 belongs to spectral class A1 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR6642 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6642. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6642