Your Guide to the Solar System and the Night Sky
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public Observing fromLocation: Greenwich, United Kingdom edit_location_alt
north SunriseRise: 6:59  
clear_day Transit: 12:48  
SunsetSet: 18:36 south
sunny DaytimeWhat's Visible Now
All Constellations » Canis Major » 


Altitude: 9.8°   Azimuth: 209.2°   Direction: South-South-West

HR2455 is a double hypergiant star in the constellation of Canis Major.

HR2455 visual magnitude is 6.05. Because of its reltive faintness, HR2455 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 HR2455:


HR2455 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 9.8°
Azimuth: 209.2°
Direction: South-South-West

Celestial coordinates and finder chart of HR2455

HR2455 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 HR2455 are provided in the following table:

06h 39m 36s
-23° 41’ 44”
Canis Major

The simplified sky map below shows the position of HR2455 in the sky:

Finder chart HR2455 star
Simplified finder chart for HR2455.

Visibility of HR2455 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 HR2455 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: 113.7°
Max altitude: 14.8°
Azimuth: 246.3°

Digitized Sky Survey image of HR2455

The image below is a photograph of HR2455 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 HR2455 is 0.013 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 HR2455 star
DSS2 image of HR2455. The red arrow shows the motion of HR2455 during the next 10000 years (2.17 arcmin in Right Ascension and -0.33 arcmin in declination);

Distance of HR2455 from the Sun and relative movement

HR2455 is distant 613.94 light years from the Sun and it is moving far from the Sun at the speed of 26 kilometers per second.

188.32 pc
613.94 ly
26 km/s
0.013 arcsec/year
-0.002 arcsec/year

Spectral properties of HR2455

HR2455 belongs to spectral class A0


The red dot in the diagram below shows where HR2455 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR2455. Attribution: Richard Powell / CC BY-SA

HR2455 star system properties

HR2455 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 HR2455 double sysyem:

0.1 arcsec

Alternative designations of HR2455