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: 4:50  
clear_day Transit: 12:56  
SunsetSet: 21:02 south
sunny DaytimeWhat's Visible Now
All Constellations » Microscopium » 


HR8117 is a giant star in the constellation of Microscopium.

HR8117 visual magnitude is 6.21. Because of its reltive faintness, HR8117 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 HR8117:

HR8117 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR8117

HR8117 is situated south of the celestial equator, as such, it is more easily visible from the southern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8117 are provided in the following table:

21h 15m 14s
-40° 30’ 23”

The simplified sky map below shows the position of HR8117 in the sky:

Finder chart HR8117 star
Simplified finder chart for HR8117.

Visibility of HR8117 from your location

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

HR8117 is currently not visible from Greenwich, United Kingdom edit_location_alt

Digitized Sky Survey image of HR8117

The image below is a photograph of HR8117 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 HR8117 is 0.139 arcsec per year in Right Ascension and -0.009 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR8117 star
DSS2 image of HR8117. The red arrow shows the motion of HR8117 during the next 1000 years (2.32 arcmin in Right Ascension and -0.15 arcmin in declination);

Distance of HR8117 from the Sun and relative movement

HR8117 is distant 583.18 light years from the Sun and it is moving towards the Sun at the speed of 42 kilometers per second.

178.89 pc
583.18 ly
-42 km/s
0.139 arcsec/year
-0.009 arcsec/year

Spectral properties of HR8117

HR8117 belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR8117 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR8117. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8117