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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
sleep NighttimeWhat's Visible Now?
All Constellations » Camelopardalis » 


Altitude: 46.1°   Azimuth: 41.3°   Direction: North-East

HR1720 is a supergiant star in the constellation of Camelopardalis.

HR1720 visual magnitude is 5.61. Because of its reltive faintness, HR1720 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 HR1720:


HR1720 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 46.1°
Azimuth: 41.3°
Direction: North-East

Celestial coordinates and finder chart of HR1720

HR1720 is situated close to the northern celestial pole and, as such, it is visible for most part of the year from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR1720 are provided in the following table:

05h 20m 22s
+62° 39’ 12”

The simplified sky map below shows the position of HR1720 in the sky:

Finder chart HR1720 star
Simplified finder chart for HR1720.

Visibility of HR1720 from your location

Location: Greenwich, United Kingdom edit_location_alt
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

HR1720 is circumpolar and transits at 00:02 UTC (altitude: 78.8°)

Digitized Sky Survey image of HR1720

The image below is a photograph of HR1720 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 HR1720 is -0.003 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

Image of HR1720 star
DSS2 image of HR1720. The red arrow shows the motion of HR1720 during the next 100000 years (-5.00 arcmin in Right Ascension and -3.33 arcmin in declination);

Distance of HR1720 from the Sun and relative movement

HR1720 is distant 1,975.76 light years from the Sun and it is moving towards the Sun at the speed of 6 kilometers per second.

606.06 pc
1,975.76 ly
-6 km/s
-0.003 arcsec/year
-0.002 arcsec/year

Spectral properties of HR1720

HR1720 belongs to spectral class K4 and has a luminosity class of I corresponding to a supergiant star.


The red dot in the diagram below shows where HR1720 is situated in the Hertzsprungā€“Russell diagram.

HR Diagram
H-R diagram showing the position of HR1720. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR1720