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: 7:51  
clear_day Transit: 11:50  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Pegasus » 


Altitude: 30.3°   Azimuth: 89.7°   Direction: East

HR8240 is a variable star in the constellation of Pegasus.

HR8240 visual magnitude is 6.7. Because of its reltive faintness, HR8240 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 HR8240:


HR8240 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 30.3°
Azimuth: 89.7°
Direction: East

Celestial coordinates and finder chart of HR8240

HR8240 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8240 are provided in the following table:

21h 32m 27s
+23° 23’ 39”

The simplified sky map below shows the position of HR8240 in the sky:

Finder chart HR8240 star
Simplified finder chart for HR8240.

Visibility of HR8240 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 HR8240 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: 66.6°
Max altitude: 61.9°
Azimuth: 293.4°

Digitized Sky Survey image of HR8240

The image below is a photograph of HR8240 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 HR8240 is 0.036 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8240 star
DSS2 image of HR8240. The red arrow shows the motion of HR8240 during the next 10000 years (6.00 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of HR8240 from the Sun and relative movement

HR8240 is distant 607.08 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

186.22 pc
607.08 ly
-16 km/s
0.036 arcsec/year
0.002 arcsec/year

Spectral properties of HR8240

HR8240 belongs to spectral class B9 HR8240 is also a SiSrCr chemically peculiar star.


The red dot in the diagram below shows where HR8240 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8240. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8240