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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: 6:52  
clear_day Transit: 12:11  
SunsetSet: 17:31
sunny DaytimeWhat's Visible Now?
All Constellations » Aquila » 


Altitude: 11.9°   Azimuth: 247.5°   Direction: West-South-West

HR7681 is a hypergiant star in the constellation of Aquila.

HR7681 visual magnitude is 6.47. Because of its reltive faintness, HR7681 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 HR7681 is 0.045 arcsec per year in Right Ascension and -0.045 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7681 star
DSS2 image of HR7681. The red arrow shows the motion of HR7681 during the next 10000 years (7.50 arcmin in Right Ascension and -7.50 arcmin in declination);

Key facts about HR7681


HR7681 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 11.9°
Azimuth: 247.5°
Direction: West-South-West

Celestial coordinates and finder chart of HR7681

HR7681 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 HR7681 are provided in the following table:

20h 06m 12s
-04° 04’ 41”

The simplified sky map below shows the position of HR7681 in the sky:

Finder chart HR7681 star
Simplified finder chart for HR7681.

Visibility of HR7681 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 HR7681 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: 94.1°
Max altitude: 34.4°
Azimuth: 265.9°

Distance of HR7681 from the Sun and relative movement

HR7681 is distant 340.65 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

104.49 pc
340.65 ly
-2 km/s
0.045 arcsec/year
-0.045 arcsec/year

Spectral properties of HR7681

HR7681 belongs to spectral class K0


The red dot in the diagram below shows where HR7681 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7681. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7681