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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
north SunriseRise: 7:44  
clear_day Transit: 11:48  
SunsetSet: 15:51 south
sleep NighttimeWhat's Visible Now?
All Constellations » Canis Major » 


Altitude: -1.5°   Azimuth: 134.0°   Direction: South-East

HR2800 is a variable and double main-sequence star in the constellation of Canis Major.

HR2800 visual magnitude is 6.01. Because of its reltive faintness, HR2800 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 HR2800:


HR2800 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -1.5°
Azimuth: 134.0°
Direction: South-East

Celestial coordinates and finder chart of HR2800

HR2800 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 HR2800 are provided in the following table:

07h 20m 54s
-26° 57’ 48”
Canis Major

The simplified sky map below shows the position of HR2800 in the sky:

Finder chart HR2800 star
Simplified finder chart for HR2800.

Visibility of HR2800 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 HR2800 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: 117.0°
Max altitude: 11.6°
Azimuth: 243.0°

Digitized Sky Survey image of HR2800

The image below is a photograph of HR2800 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 HR2800 is 0.01 arcsec per year in Right Ascension and 0.019 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2800 star
DSS2 image of HR2800. The red arrow shows the motion of HR2800 during the next 10000 years (1.67 arcmin in Right Ascension and 3.17 arcmin in declination);

Distance of HR2800 from the Sun and relative movement

HR2800 is distant 1,801.10 light years from the Sun and it is moving far from the Sun at the speed of 18 kilometers per second.

552.49 pc
1,801.10 ly
18 km/s
0.01 arcsec/year
0.019 arcsec/year

Spectral properties of HR2800

HR2800 belongs to spectral class B2 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR2800 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2800. Attribution: Richard Powell / CC BY-SA

HR2800 star system properties

HR2800 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 HR2800 double sysyem:

8.2 arcsec

Alternative designations of HR2800