We use cookies to deliver essential features and to measure their performance. By using this site you accept our Privacy Policies.
A Complete Guide to the Solar System and the Night Sky
Donate now and help us to keep this site free and ad-free!
public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 7:52  
clear_day Transit: 11:51  
SunsetSet: 15:49 south
wb_twilight Nautical TwilightWhat's Visible Now?
All Constellations » Canis Major » 


Altitude: -5.7°   Azimuth: 256.3°   Direction: West-South-West

HR2309 is a double main-sequence star in the constellation of Canis Major.

HR2309 visual magnitude is 6.12. Because of its reltive faintness, HR2309 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 HR2309:


HR2309 is below the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: -5.7°
Azimuth: 256.3°
Direction: West-South-West

Celestial coordinates and finder chart of HR2309

HR2309 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 HR2309 are provided in the following table:

06h 24m 20s
-12° 57’ 45”
Canis Major

The simplified sky map below shows the position of HR2309 in the sky:

Finder chart HR2309 star
Simplified finder chart for HR2309.

Visibility of HR2309 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 HR2309 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: 103.0°
Max altitude: 25.6°
Azimuth: 257.0°

Digitized Sky Survey image of HR2309

The image below is a photograph of HR2309 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 HR2309 is -0.012 arcsec per year in Right Ascension and -0.012 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR2309 star
DSS2 image of HR2309. The red arrow shows the motion of HR2309 during the next 10000 years (-2.00 arcmin in Right Ascension and -2.00 arcmin in declination);

Distance of HR2309 from the Sun and relative movement

HR2309 is distant 1,917.65 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

588.24 pc
1,917.65 ly
8 km/s
-0.012 arcsec/year
-0.012 arcsec/year

Spectral properties of HR2309

HR2309 belongs to spectral class B5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR2309 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2309. Attribution: Richard Powell / CC BY-SA

HR2309 star system properties

HR2309 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 HR2309 double sysyem:

23.2 arcsec

Alternative designations of HR2309