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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: 7:01  
clear_day Transit: 12:12  
SunsetSet: 17:24
sunny DaytimeWhat's Visible Now?
All Constellations » Cygnus » 


Altitude: 75.3°   Azimuth: 283.9°   Direction: West-North-West

HR8242 is a supergiant star in the constellation of Cygnus.

HR8242 visual magnitude is 6.16. Because of its reltive faintness, HR8242 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR8242 is 0.009 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR8242 star
DSS2 image of HR8242. The red arrow shows the motion of HR8242 during the next 100000 years (15.00 arcmin in Right Ascension and 5.00 arcmin in declination);

Key facts about HR8242


HR8242 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 75.3°
Azimuth: 283.9°
Direction: West-North-West

Celestial coordinates and finder chart of HR8242

HR8242 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 HR8242 are provided in the following table:

21h 31m 27s
+52° 37’ 11”

The simplified sky map below shows the position of HR8242 in the sky:

Finder chart HR8242 star
Simplified finder chart for HR8242.

Visibility of HR8242 from your location

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

HR8242 is circumpolar and transits at 11:23 UTC (altitude: 88.9°)

Distance of HR8242 from the Sun and relative movement

HR8242 is distant 1,147.89 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

352.11 pc
1,147.89 ly
-23 km/s
0.009 arcsec/year
0.003 arcsec/year

Spectral properties of HR8242

HR8242 belongs to spectral class G2 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR8242 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8242. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8242