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: 4:48  
clear_day Transit: 12:56  
SunsetSet: 21:05 south
sunny DaytimeWhat's Visible Now
All Constellations » Cetus » 


HR108 is a double hypergiant star in the constellation of Cetus.

HR108 visual magnitude is 6.43. Because of its reltive faintness, HR108 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 HR108:

HR108 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Celestial coordinates and finder chart of HR108

HR108 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 HR108 are provided in the following table:

00h 28m 21s
-20° 20’ 06”

The simplified sky map below shows the position of HR108 in the sky:

Finder chart HR108 star
Simplified finder chart for HR108.

Visibility of HR108 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 HR108 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: 110.3°
Max altitude: 18.2°
Azimuth: 249.7°
HR108 is below the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR108

The image below is a photograph of HR108 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 HR108 is -0.116 arcsec per year in Right Ascension and -0.114 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR108 star
DSS2 image of HR108. The red arrow shows the motion of HR108 during the next 1000 years (-1.93 arcmin in Right Ascension and -1.90 arcmin in declination);

Distance of HR108 from the Sun and relative movement

HR108 is distant 105.13 light years from the Sun and it is moving far from the Sun at the speed of 6 kilometers per second.

32.25 pc
105.13 ly
6 km/s
-0.116 arcsec/year
-0.114 arcsec/year

Spectral properties of HR108

HR108 belongs to spectral class G0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR108 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR108. Attribution: Richard Powell / CC BY-SA

HR108 star system properties

HR108 is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the HR108 double sysyem:

0.2 arcsec

Alternative designations of HR108