Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

HR787

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 skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about HR787:

5.84
Hypergiant
HR787 is above the horizon from Greenwich, United Kingdom [change]. Altitude: 16°.

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”
139.16°
-5.79°
Perseus

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 [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR787 is circumpolar and transits at 02:49 UTC (altitude: 88.0°)

Digitized Sky Survey image of HR787

The image below is a photograph of HR787 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 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);

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.

0.33
K0II
4472K

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:

5.84
14.84
9
12.4 arcsec

Alternative designations of HR787

SAO23556
SAO23556