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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
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All Constellations » Lyra » 

HR6901

Altitude: 6.3°   Azimuth: 29.2°   Direction: North-North-East

HR6901 is a variable and multiple giant star in the constellation of Lyra.

HR6901 visual magnitude is 6.36. Because of its reltive faintness, HR6901 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR6901 is 0.027 arcsec per year in Right Ascension and 0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR6901 star
DSS2 image of HR6901. The red arrow shows the motion of HR6901 during the next 10000 years (4.50 arcmin in Right Ascension and 1.00 arcmin in declination);

Key facts about HR6901

6.36
Giant

HR6901 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 6.3°
Azimuth: 29.2°
Direction: North-North-East

Celestial coordinates and finder chart of HR6901

HR6901 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 HR6901 are provided in the following table:

18h 23m 57s
+38° 44’ 21”
66.53°
21.62°
Lyra

The simplified sky map below shows the position of HR6901 in the sky:

Finder chart HR6901 star
Simplified finder chart for HR6901.

Visibility of HR6901 from your location

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

HR6901 is circumpolar and transits at 07:41 UTC (altitude: 77.3°)

Distance of HR6901 from the Sun and relative movement

HR6901 is distant 857.89 light years from the Sun and it is moving towards the Sun at the speed of 40 kilometers per second.

263.16 pc
857.89 ly
-40 km/s
0.027 arcsec/year
0.006 arcsec/year

Spectral properties of HR6901

HR6901 belongs to spectral class K4 and has a luminosity class of III corresponding to a giant star.

-0.74
K4III
10125K

The red dot in the diagram below shows where HR6901 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR6901. Attribution: Richard Powell / CC BY-SA

HR6901 star system properties

HR6901 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 HR6901 double sysyem:

6.36
12.46
6.1
61.5 arcsec

Alternative designations of HR6901

SAO66936
SAO66936