Your guide to the Solar System and the night sky
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🌎  Observing from: Greenwich, United Kingdom [change]
🌅 Sunrise: 6:45  ☀️ Transit: 13:03  🌅 Sunset: 19:23


HR6641 is a main-sequence star in the constellation of Hercules.

HR6641 visual magnitude is 6.43. Because of its reltive faintness, HR6641 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 HR6641:

HR6641 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 17°.

Celestial coordinates and finder chart of HR6641

HR6641 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR6641 are provided in the following table:

17h 47m 08s
+47° 36’ 43”

The simplified sky map below shows the position of HR6641 in the sky:

Finder chart HR6641 star
Simplified finder chart for HR6641.

Visibility of HR6641 from your location

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

HR6641 is circumpolar and transits at 05:25 UTC (altitude: 86.1°)

Digitized Sky Survey image of HR6641

The image below is a photograph of HR6641 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 HR6641 is -0.004 arcsec per year in Right Ascension and 0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR6641 star
DSS2 image of HR6641. The red arrow shows the motion of HR6641 during the next 100000 years (-6.67 arcmin in Right Ascension and 8.33 arcmin in declination);

Distance of HR6641 from the Sun and relative movement

HR6641 is distant 428.95 light years from the Sun and it is moving towards the Sun at the speed of 26 kilometers per second.

131.58 pc
428.95 ly
-26 km/s
-0.004 arcsec/year
0.005 arcsec/year

Spectral properties of HR6641

HR6641 belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR6641 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR6641. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR6641