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: 4:51  
clear_day Transit: 12:56  
SunsetSet: 21:00 south
sunny DaytimeWhat's Visible Now
All Constellations » Cassiopeia » 


HR381 is a hypergiant star in the constellation of Cassiopeia.

HR381 visual magnitude is 6.38. Because of its reltive faintness, HR381 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 HR381:

HR381 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 49°.

Celestial coordinates and finder chart of HR381

HR381 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 HR381 are provided in the following table:

01h 21m 59s
+76° 14’ 20”

The simplified sky map below shows the position of HR381 in the sky:

Finder chart HR381 star
Simplified finder chart for HR381.

Visibility of HR381 from your location

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

HR381 is circumpolar and transits at 08:55 UTC (altitude: 65.2°)

Digitized Sky Survey image of HR381

The image below is a photograph of HR381 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 HR381 is 0.063 arcsec per year in Right Ascension and -0.032 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of HR381 star
DSS2 image of HR381. The red arrow shows the motion of HR381 during the next 10000 years (10.50 arcmin in Right Ascension and -5.33 arcmin in declination);

Distance of HR381 from the Sun and relative movement

HR381 is distant 250.00 light years from the Sun and it is moving towards the Sun at the speed of 16 kilometers per second.

76.69 pc
250.00 ly
-16 km/s
0.063 arcsec/year
-0.032 arcsec/year

Spectral properties of HR381

HR381 belongs to spectral class F0 and has a luminosity class of IV corresponding to a hypergiant star.


The red dot in the diagram below shows where HR381 is situated in the Hertzsprung–Russell diagram.

HR Diagram
H-R diagram showing the position of HR381. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR381