Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:44  
clear_day Transit: 12:51  
SunsetSet: 18:57 south
sleep NighttimeWhat's Visible Now
All Constellations » Vulpecula » 


Altitude: 63.0°   Azimuth: 178.5°   Direction: South

HR8197 is a hypergiant star in the constellation of Vulpecula.

HR8197 visual magnitude is 6.32. Because of its reltive faintness, HR8197 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 HR8197:


HR8197 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 63.0°
Azimuth: 178.5°
Direction: South

Celestial coordinates and finder chart of HR8197

HR8197 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 HR8197 are provided in the following table:

21h 24m 23s
+24° 31’ 44”

The simplified sky map below shows the position of HR8197 in the sky:

Finder chart HR8197 star
Simplified finder chart for HR8197.

Visibility of HR8197 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 HR8197 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: 65.5°
Max altitude: 63.0°
Azimuth: 294.5°

Digitized Sky Survey image of HR8197

The image below is a photograph of HR8197 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 HR8197 is 0.033 arcsec per year in Right Ascension and 0 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR8197 star
DSS2 image of HR8197. The red arrow shows the motion of HR8197 during the next 10000 years (5.50 arcmin in Right Ascension and 0.00 arcmin in declination);

Distance of HR8197 from the Sun and relative movement

HR8197 is distant 507.79 light years from the Sun and it is moving towards the Sun at the speed of 24 kilometers per second.

155.76 pc
507.79 ly
-24 km/s
0.033 arcsec/year

Spectral properties of HR8197

HR8197 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.


The red dot in the diagram below shows where HR8197 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8197. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8197