Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:02 south
wb_twilight Astronomical TwilightWhat's Visible Now
All Constellations » Aquila » 


HR7809 is a giant star in the constellation of Aquila.

HR7809 visual magnitude is 6.11. Because of its reltive faintness, HR7809 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 HR7809:

HR7809 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 26°.

Celestial coordinates and finder chart of HR7809

HR7809 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 HR7809 are provided in the following table:

20h 25m 42s
-02° 48’ 01”

The simplified sky map below shows the position of HR7809 in the sky:

Finder chart HR7809 star
Simplified finder chart for HR7809.

Visibility of HR7809 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 HR7809 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: 92.8°
Max altitude: 35.7°
Azimuth: 267.2°
HR7809 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR7809

The image below is a photograph of HR7809 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 HR7809 is -0.007 arcsec per year in Right Ascension and -0.03 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7809 star
DSS2 image of HR7809. The red arrow shows the motion of HR7809 during the next 10000 years (-1.17 arcmin in Right Ascension and -5.00 arcmin in declination);

Distance of HR7809 from the Sun and relative movement

HR7809 is distant 713.35 light years from the Sun and it is moving far from the Sun at the speed of 24 kilometers per second.

218.82 pc
713.35 ly
24 km/s
-0.007 arcsec/year
-0.03 arcsec/year

Spectral properties of HR7809

HR7809 belongs to spectral class K1


The red dot in the diagram below shows where HR7809 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7809. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7809