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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: 7:38  
clear_day Transit: 11:46  
SunsetSet: 15:54 south
sleep NighttimeWhat's Visible Now?
All Constellations » Cassiopeia » 


Altitude: 84.3°   Azimuth: 116.6°   Direction: East-South-East

HR256 is a giant star in the constellation of Cassiopeia.

HR256 visual magnitude is 6.27. Because of its reltive faintness, HR256 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 HR256:


HR256 is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 84.3°
Azimuth: 116.6°
Direction: East-South-East

Celestial coordinates and finder chart of HR256

HR256 is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR256 are provided in the following table:

00h 55m 05s
+48° 40’ 42”

The simplified sky map below shows the position of HR256 in the sky:

Finder chart HR256 star
Simplified finder chart for HR256.

Visibility of HR256 from your location

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

HR256 is circumpolar and transits at 20:21 UTC (altitude: 87.2°)

Digitized Sky Survey image of HR256

The image below is a photograph of HR256 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 HR256 is -0.022 arcsec per year in Right Ascension and -0.006 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR256 star
DSS2 image of HR256. The red arrow shows the motion of HR256 during the next 10000 years (-3.67 arcmin in Right Ascension and -1.00 arcmin in declination);

Distance of HR256 from the Sun and relative movement

HR256 is distant 802.96 light years from the Sun and it is moving towards the Sun at the speed of 52 kilometers per second.

246.31 pc
802.96 ly
-52 km/s
-0.022 arcsec/year
-0.006 arcsec/year

Spectral properties of HR256

HR256 belongs to spectral class M2 and has a luminosity class of III corresponding to a giant star.


The red dot in the diagram below shows where HR256 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR256. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR256