HR318

HR318 is a multiple giant star in the constellation of Cassiopeia.

HR318 visual magnitude is 6.38. Because of its reltive faintness, HR318 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 HR318:

Color of HR318 ⬤

Magnitude of HR318 6.38

Class Giant

VISIBILITY RIGHT NOW HR318 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 33°.

Celestial coordinates and finder chart of HR318

HR318 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 HR318 are provided in the following table:

Right Ascension J2000 01h 07m 09s

Declination J2000 +53° 29’ 53”

Galactic Longitude 125.3°

Galactic Latitude -9.3°

Constellation Cassiopeia

The simplified sky map below shows the position of HR318 in the sky:

Simplified finder chart for HR318.

Visibility of HR318 from your location

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

HR318 is circumpolar and transits at 08:28 UTC (altitude: 88.0°)

Digitized Sky Survey image of HR318

The image below is a photograph of HR318 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 HR318 is 0.023 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 HR318. The red arrow shows the motion of HR318 during the next 10000 years (3.83 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of HR318 from the Sun and relative movement

HR318 is distant 1,358.33 light years from the Sun and it is moving far from the Sun at the speed of 7 kilometers per second.

Distance (parsec) 416.67 pc

Distance (light year) 1,358.33 ly

Heliocentric radial velocity 7 km/s

Proper Motion RA 0.023 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of HR318

HR318 belongs to spectral class K2 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.72

Spectral Type K2III

Color Index (B-V)

Temperature of HR318 10125K

The red dot in the diagram below shows where HR318 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR318. Attribution: Richard Powell / CC BY-SA

HR318 star system properties

HR318 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR318 double sysyem:

Main star magnitude 6.38

Secondary star magnitude 10.38

Magnitude difference 4

Separation 21.7 arcsec

Alternative designations of HR318

Henry Draper Catalogue HD6540

SAO Catalogue SAO22021

Hipparcos Catalogue HIP5251

Durchmusterung Catalogue BD+52 262

Aitken Double Star Catalogue ADS915

In Evidence

Other stars in Cassiopeia