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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: 6:59  
clear_day Transit: 12:12  
SunsetSet: 17:25
sunny DaytimeWhat's Visible Now?
All Constellations » Canis Major » 


Altitude: -2.2°   Azimuth: 123.5°   Direction: East-South-East

HR2839 is a double supergiant star in the constellation of Canis Major.

HR2839 visual magnitude is 6.05. Because of its reltive faintness, HR2839 should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The proper motion of HR2839 is -0.01 arcsec per year in Right Ascension and 0.003 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2839 star
DSS2 image of HR2839. The red arrow shows the motion of HR2839 during the next 10000 years (-1.67 arcmin in Right Ascension and 0.50 arcmin in declination);

Key facts about HR2839


HR2839 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -2.2°
Azimuth: 123.5°
Direction: East-South-East

Celestial coordinates and finder chart of HR2839

HR2839 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 HR2839 are provided in the following table:

07h 25m 19s
-21° 58’ 58”
Canis Major

The simplified sky map below shows the position of HR2839 in the sky:

Finder chart HR2839 star
Simplified finder chart for HR2839.

Visibility of HR2839 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 HR2839 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: 112.0°
Max altitude: 16.5°
Azimuth: 248.0°

Distance of HR2839 from the Sun and relative movement

HR2839 is distant 3,165.05 light years from the Sun and it is moving far from the Sun at the speed of 41 kilometers per second.

970.87 pc
3,165.05 ly
41 km/s
-0.01 arcsec/year
0.003 arcsec/year

Spectral properties of HR2839

HR2839 belongs to spectral class A8 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR2839 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2839. Attribution: Richard Powell / CC BY-SA

HR2839 star system properties

HR2839 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 HR2839 double sysyem:

2.4 arcsec

Alternative designations of HR2839