HR923

HR923 is a hypergiant star in the constellation of Perseus.

HR923 visual magnitude is 6.05. Because of its reltive faintness, HR923 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 HR923:

Color of HR923 ⬤

Magnitude of HR923 6.05

Class Hypergiant

VISIBILITY RIGHT NOW HR923 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 25°.

Celestial coordinates and finder chart of HR923

HR923 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 HR923 are provided in the following table:

Right Ascension J2000 03h 05m 20s

Declination J2000 +40° 34’ 57”

Galactic Longitude 148.7°

Galactic Latitude -15.49°

Constellation Perseus

The simplified sky map below shows the position of HR923 in the sky:

Simplified finder chart for HR923.

Visibility of HR923 from your location

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

HR923 is circumpolar and transits at 10:18 UTC (altitude: 79.1°)

Digitized Sky Survey image of HR923

The image below is a photograph of HR923 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 HR923 is -0.053 arcsec per year in Right Ascension and 0.001 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of HR923. The red arrow shows the motion of HR923 during the next 10000 years (-8.83 arcmin in Right Ascension and 0.17 arcmin in declination);

Distance of HR923 from the Sun and relative movement

HR923 is distant 408.01 light years from the Sun and it is moving towards the Sun at the speed of 34 kilometers per second.

Distance (parsec) 125.16 pc

Distance (light year) 408.01 ly

Heliocentric radial velocity -34 km/s

Proper Motion RA -0.053 arcsec/year

Proper Motion Dec 0.001 arcsec/year

Spectral properties of HR923

HR923 belongs to spectral class K0 and has a luminosity class of III corresponding to a hypergiant star.

Absolute magnitude 0.56

Spectral Type K0III

Color Index (B-V) 1.01

Temperature of HR923 4719K

The red dot in the diagram below shows where HR923 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR923. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR923

Henry Draper Catalogue HD19066

SAO Catalogue SAO38559

Hipparcos Catalogue HIP14365

Durchmusterung Catalogue BD+40 664

In Evidence

Other stars in Perseus