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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: 6:55  
clear_day Transit: 12:11  
SunsetSet: 17:29
sunny DaytimeWhat's Visible Now?
All Constellations » Perseus » 


Altitude: 25.9°   Azimuth: 34.4°   Direction: North-East

HR787 is a double hypergiant star in the constellation of Perseus.

HR787 visual magnitude is 5.84. Because of its reltive faintness, HR787 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 HR787 is 0.068 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 HR787 star
DSS2 image of HR787. The red arrow shows the motion of HR787 during the next 10000 years (11.33 arcmin in Right Ascension and -5.00 arcmin in declination);

Key facts about HR787


HR787 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 25.9°
Azimuth: 34.4°
Direction: North-East

Celestial coordinates and finder chart of HR787

HR787 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 HR787 are provided in the following table:

02h 42m 59s
+53° 31’ 33”

The simplified sky map below shows the position of HR787 in the sky:

Finder chart HR787 star
Simplified finder chart for HR787.

Visibility of HR787 from your location

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

HR787 is circumpolar and transits at 16:22 UTC (altitude: 88.0°)

Distance of HR787 from the Sun and relative movement

HR787 is distant 412.66 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

126.58 pc
412.66 ly
-12 km/s
0.068 arcsec/year
-0.03 arcsec/year

Spectral properties of HR787

HR787 belongs to spectral class K0 and has a luminosity class of II corresponding to a hypergiant star.


The red dot in the diagram below shows where HR787 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR787. Attribution: Richard Powell / CC BY-SA

HR787 star system properties

HR787 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR787 double sysyem:

12.4 arcsec

Alternative designations of HR787