HR309

HR309 is a main-sequence star in the constellation of Cassiopeia.

HR309 visual magnitude is 6.54. Because of its reltive faintness, HR309 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 HR309:

Color of HR309 ⬤

Magnitude of HR309 6.54

Class Main-sequence

VISIBILITY RIGHT NOW HR309 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 25°.

Celestial coordinates and finder chart of HR309

HR309 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 HR309 are provided in the following table:

Right Ascension J2000 01h 06m 22s

Declination J2000 +62° 45’ 42”

Galactic Longitude 124.64°

Galactic Latitude -0.06°

Constellation Cassiopeia

The simplified sky map below shows the position of HR309 in the sky:

Simplified finder chart for HR309.

Visibility of HR309 from your location

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

HR309 is circumpolar and transits at 08:28 UTC (altitude: 78.7°)

Digitized Sky Survey image of HR309

The image below is a photograph of HR309 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 HR309 is 0.102 arcsec per year in Right Ascension and -0.024 arcsec per year in Declination and the associated displacement for the next 1000 years is represented with the red arrow.

DSS2 image of HR309. The red arrow shows the motion of HR309 during the next 1000 years (1.70 arcmin in Right Ascension and -0.40 arcmin in declination);

Distance of HR309 from the Sun and relative movement

HR309 is distant 226.55 light years from the Sun and it is moving far from the Sun at the speed of 11 kilometers per second.

Distance (parsec) 69.49 pc

Distance (light year) 226.55 ly

Heliocentric radial velocity 11 km/s

Proper Motion RA 0.102 arcsec/year

Proper Motion Dec -0.024 arcsec/year

Spectral properties of HR309

HR309 belongs to spectral class A5 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude 2.33

Spectral Type A5V

Color Index (B-V) 0.19

Temperature of HR309 8241K

The red dot in the diagram below shows where HR309 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR309. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR309

Henry Draper Catalogue HD6416

SAO Catalogue SAO11571

Hipparcos Catalogue HIP5186

Durchmusterung Catalogue BD+61 206

In Evidence

Other stars in Cassiopeia