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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
sleep NighttimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 13.3°   Azimuth: 304.4°   Direction: North-West

HR7887 is a multiple hypergiant star in the constellation of Cygnus.

HR7887 visual magnitude is 6.49. Because of its reltive faintness, HR7887 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 HR7887:


HR7887 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 13.3°
Azimuth: 304.4°
Direction: North-West

Celestial coordinates and finder chart of HR7887

HR7887 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 HR7887 are provided in the following table:

20h 37m 32s
+31° 31’ 18”

The simplified sky map below shows the position of HR7887 in the sky:

Finder chart HR7887 star
Simplified finder chart for HR7887.

Visibility of HR7887 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 HR7887 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: 58.5°
Max altitude: 70.0°
Azimuth: 301.5°

Digitized Sky Survey image of HR7887

The image below is a photograph of HR7887 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 HR7887 is -0.045 arcsec per year in Right Ascension and -0.033 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR7887 star
DSS2 image of HR7887. The red arrow shows the motion of HR7887 during the next 10000 years (-7.50 arcmin in Right Ascension and -5.50 arcmin in declination);

Distance of HR7887 from the Sun and relative movement

HR7887 is distant 160.59 light years from the Sun and it is moving far from the Sun at the speed of 1 kilometers per second.

49.26 pc
160.59 ly
1 km/s
-0.045 arcsec/year
-0.033 arcsec/year

Spectral properties of HR7887

HR7887 belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR7887 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR7887. Attribution: Richard Powell / CC BY-SA

HR7887 star system properties

HR7887 is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the HR7887 double sysyem:

180.8 arcsec

Alternative designations of HR7887