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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: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
wb_twilight Civil TwilightWhat's Visible Now?
All Constellations » Aquila » 


Altitude: -15.3°   Azimuth: 82.7°   Direction: East

HR7661 is a giant star in the constellation of Aquila.

HR7661 visual magnitude is 6.72. Because of its reltive faintness, HR7661 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 HR7661:


HR7661 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -15.3°
Azimuth: 82.7°
Direction: East

Celestial coordinates and finder chart of HR7661

HR7661 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 HR7661 are provided in the following table:

20h 04m 01s
-07° 28’ 10”

The simplified sky map below shows the position of HR7661 in the sky:

Finder chart HR7661 star
Simplified finder chart for HR7661.

Visibility of HR7661 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 HR7661 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: 97.5°
Max altitude: 31.1°
Azimuth: 262.5°

Digitized Sky Survey image of HR7661

The image below is a photograph of HR7661 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 HR7661 is 0.015 arcsec per year in Right Ascension and -0.048 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7661 star
DSS2 image of HR7661. The red arrow shows the motion of HR7661 during the next 10000 years (2.50 arcmin in Right Ascension and -8.00 arcmin in declination);

Distance of HR7661 from the Sun and relative movement

HR7661 is distant 211.83 light years from the Sun and it is moving far from the Sun at the speed of 4 kilometers per second.

64.98 pc
211.83 ly
4 km/s
0.015 arcsec/year
-0.048 arcsec/year

Spectral properties of HR7661

HR7661 belongs to spectral class F4 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7661 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7661. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7661