We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 47.8°   Azimuth: 57.5°   Direction: East-North-East

HR7815 is a giant star in the constellation of Cygnus.

HR7815 visual magnitude is 6.51. Because of its reltive faintness, HR7815 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 HR7815:


HR7815 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 47.8°
Azimuth: 57.5°
Direction: East-North-East

Celestial coordinates and finder chart of HR7815

HR7815 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 HR7815 are provided in the following table:

20h 24m 32s
+53° 33’ 06”

The simplified sky map below shows the position of HR7815 in the sky:

Finder chart HR7815 star
Simplified finder chart for HR7815.

Visibility of HR7815 from your location

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

HR7815 is circumpolar and transits at 15:04 UTC (altitude: 87.9°)

Digitized Sky Survey image of HR7815

The image below is a photograph of HR7815 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 HR7815 is 0.01 arcsec per year in Right Ascension and 0.015 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7815 star
DSS2 image of HR7815. The red arrow shows the motion of HR7815 during the next 10000 years (1.67 arcmin in Right Ascension and 2.50 arcmin in declination);

Distance of HR7815 from the Sun and relative movement

HR7815 is distant 1,461.88 light years from the Sun and it is moving towards the Sun at the speed of 19 kilometers per second.

448.43 pc
1,461.88 ly
-19 km/s
0.01 arcsec/year
0.015 arcsec/year

Spectral properties of HR7815

HR7815 belongs to spectral class B9 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR7815 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7815. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7815