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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: 7:47  
clear_day Transit: 11:49  
SunsetSet: 15:50 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cassiopeia » 


Altitude: 43.3°   Azimuth: 321.1°   Direction: North-West

HR309 is a main-sequence star in the constellation of Cassiopeia.

HR309 visual magnitude is 6.54. Because of its reltive faintness, HR309 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 HR309:


HR309 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 43.3°
Azimuth: 321.1°
Direction: North-West

Celestial coordinates and finder chart of HR309

HR309 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 HR309 are provided in the following table:

01h 06m 22s
+62° 45’ 42”

The simplified sky map below shows the position of HR309 in the sky:

Finder chart HR309 star
Simplified finder chart for HR309.

Visibility of HR309 from your location

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

HR309 is circumpolar and transits at 20:08 UTC (altitude: 78.7°)

Digitized Sky Survey image of HR309

The image below is a photograph of HR309 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 HR309 is 0.102 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

Image of HR309 star
DSS2 image of HR309. The red arrow shows the motion of HR309 during the next 1000 years (1.70 arcmin in Right Ascension and -0.40 arcmin in declination);

Distance of HR309 from the Sun and relative movement

HR309 is distant 226.55 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

69.49 pc
226.55 ly
11 km/s
0.102 arcsec/year
-0.024 arcsec/year

Spectral properties of HR309

HR309 belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.


The red dot in the diagram below shows where HR309 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR309. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR309