HR381

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:

Color of HR381 ⬤

Magnitude of HR381 6.38

Class Hypergiant

VISIBILITY RIGHT NOW 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:

Right Ascension J2000 01h 21m 59s

Declination J2000 +76° 14’ 20”

Galactic Longitude 124.79°

Galactic Latitude 13.48°

Constellation Cassiopeia

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

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.

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.

Distance (parsec) 76.69 pc

Distance (light year) 250.00 ly

Heliocentric radial velocity -16 km/s

Proper Motion RA 0.063 arcsec/year

Proper Motion Dec -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.

Absolute magnitude 1.96

Spectral Type F0IV

Color Index (B-V) 0.28

Temperature of HR381 7591K

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

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

Alternative designations of HR381

Henry Draper Catalogue HD7925

SAO Catalogue SAO4387

Hipparcos Catalogue HIP6378

Durchmusterung Catalogue BD+75 59

FK5 Catalogue 2087

In Evidence

Other stars in Cassiopeia