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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: 6:50  
clear_day Transit: 12:11  
SunsetSet: 17:32
sleep NighttimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 9.6°   Azimuth: 38.9°   Direction: North-East

HR7807 is a variable main-sequence star in the constellation of Cygnus.

HR7807 visual magnitude is 5.9. Because of its reltive faintness, HR7807 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 HR7807 is 0.004 arcsec per year in Right Ascension and -0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR7807 star
DSS2 image of HR7807. The red arrow shows the motion of HR7807 during the next 100000 years (6.67 arcmin in Right Ascension and -6.67 arcmin in declination);

Key facts about HR7807


HR7807 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.6°
Azimuth: 38.9°
Direction: North-East

Celestial coordinates and finder chart of HR7807

HR7807 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 HR7807 are provided in the following table:

20h 23m 44s
+37° 28’ 35”

The simplified sky map below shows the position of HR7807 in the sky:

Finder chart HR7807 star
Simplified finder chart for HR7807.

Visibility of HR7807 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 HR7807 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: 52.5°
Max altitude: 76.0°
Azimuth: 307.5°

Distance of HR7807 from the Sun and relative movement

HR7807 is distant 893.15 light years from the Sun and it is moving towards the Sun at the speed of 30 kilometers per second.

273.97 pc
893.15 ly
-30 km/s
0.004 arcsec/year
-0.004 arcsec/year

Spectral properties of HR7807

HR7807 belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR7807 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7807. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7807