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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: 7:43  
clear_day Transit: 11:47  
SunsetSet: 15:52 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Pegasus » 


Altitude: -3.6°   Azimuth: 17.3°   Direction: North-North-East

HR8391 is a giant star in the constellation of Pegasus.

HR8391 visual magnitude is 6.46. Because of its reltive faintness, HR8391 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 HR8391:


HR8391 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -3.6°
Azimuth: 17.3°
Direction: North-North-East

Celestial coordinates and finder chart of HR8391

HR8391 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 HR8391 are provided in the following table:

22h 00m 26s
+33° 00’ 21”

The simplified sky map below shows the position of HR8391 in the sky:

Finder chart HR8391 star
Simplified finder chart for HR8391.

Visibility of HR8391 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 HR8391 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: 57.0°
Max altitude: 71.5°
Azimuth: 303.0°

Digitized Sky Survey image of HR8391

The image below is a photograph of HR8391 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 HR8391 is -0.006 arcsec per year in Right Ascension and 0.064 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8391 star
DSS2 image of HR8391. The red arrow shows the motion of HR8391 during the next 10000 years (-1.00 arcmin in Right Ascension and 10.67 arcmin in declination);

Distance of HR8391 from the Sun and relative movement

HR8391 is distant 216.61 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

66.45 pc
216.61 ly
-2 km/s
-0.006 arcsec/year
0.064 arcsec/year

Spectral properties of HR8391

HR8391 belongs to spectral class F5 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR8391 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8391. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8391