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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
SunriseRise: 6:55  
clear_day Transit: 12:11  
SunsetSet: 17:29
sunny DaytimeWhat's Visible Now?
All Constellations » Canis Minor » 


Altitude: -30.2°   Azimuth: 344.7°   Direction: North-North-West

HR3103 is a variable hypergiant star in the constellation of Canis Minor.

HR3103 visual magnitude is 6.41. Because of its reltive faintness, HR3103 should be visible only from locations with dark skies, while it is not visible at all from skies affected by light pollution.

The proper motion of HR3103 is -0.02 arcsec per year in Right Ascension and -0.007 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR3103 star
DSS2 image of HR3103. The red arrow shows the motion of HR3103 during the next 10000 years (-3.33 arcmin in Right Ascension and -1.17 arcmin in declination);

Key facts about HR3103


HR3103 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -30.2°
Azimuth: 344.7°
Direction: North-North-West

Celestial coordinates and finder chart of HR3103

HR3103 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 HR3103 are provided in the following table:

07h 58m 05s
+07° 12’ 48”
Canis Minor

The simplified sky map below shows the position of HR3103 in the sky:

Finder chart HR3103 star
Simplified finder chart for HR3103.

Visibility of HR3103 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 HR3103 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: 82.8°
Max altitude: 45.7°
Azimuth: 277.2°

Distance of HR3103 from the Sun and relative movement

HR3103 is distant 842.38 light years from the Sun and it is moving far from the Sun at the speed of 35 kilometers per second.

258.40 pc
842.38 ly
35 km/s
-0.02 arcsec/year
-0.007 arcsec/year

Spectral properties of HR3103

HR3103 belongs to spectral class A0 and has a luminosity class of V corresponding to a hypergiant star.


The red dot in the diagram below shows where HR3103 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR3103. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR3103