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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: 7:54  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
sunny DaytimeWhat's Visible Now?
All Constellations » Canis Major » 


Altitude: -37.3°   Azimuth: 265.3°   Direction: West

HR2501 is a variable and double giant star in the constellation of Canis Major.

HR2501 visual magnitude is 5.8. Because of its reltive faintness, HR2501 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 HR2501:


HR2501 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -37.3°
Azimuth: 265.3°
Direction: West

Celestial coordinates and finder chart of HR2501

HR2501 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 HR2501 are provided in the following table:

06h 45m 31s
-30° 56’ 56”
Canis Major

The simplified sky map below shows the position of HR2501 in the sky:

Finder chart HR2501 star
Simplified finder chart for HR2501.

Visibility of HR2501 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 HR2501 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: 120.9°
Max altitude: 7.6°
Azimuth: 239.1°

Digitized Sky Survey image of HR2501

The image below is a photograph of HR2501 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 HR2501 is 0.01 arcsec per year in Right Ascension and 0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2501 star
DSS2 image of HR2501. The red arrow shows the motion of HR2501 during the next 10000 years (1.67 arcmin in Right Ascension and 0.33 arcmin in declination);

Distance of HR2501 from the Sun and relative movement

HR2501 is distant 1,582.52 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

485.44 pc
1,582.52 ly
7 km/s
0.01 arcsec/year
0.002 arcsec/year

Spectral properties of HR2501

HR2501 belongs to spectral class B2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR2501 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2501. Attribution: Richard Powell / CC BY-SA

HR2501 star system properties

HR2501 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR2501 double sysyem:

4.9 arcsec

Alternative designations of HR2501