HR7224

HR7224 is a variable hypergiant star in the constellation of Draco.

HR7224 visual magnitude is 6.52. Because of its reltive faintness, HR7224 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 HR7224:

Color of HR7224 ⬤

Magnitude of HR7224 6.52

Class Hypergiant

VISIBILITY RIGHT NOW HR7224 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 39°.

Celestial coordinates and finder chart of HR7224

HR7224 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 HR7224 are provided in the following table:

Right Ascension J2000 18h 58m 52s

Declination J2000 +69° 31’ 51”

Galactic Longitude 100.31°

Galactic Latitude 24.65°

Constellation Draco

The simplified sky map below shows the position of HR7224 in the sky:

Simplified finder chart for HR7224.

Visibility of HR7224 from your location

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

HR7224 is circumpolar and transits at 02:29 UTC (altitude: 71.9°)

Digitized Sky Survey image of HR7224

The image below is a photograph of HR7224 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 HR7224 is 0.005 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of HR7224. The red arrow shows the motion of HR7224 during the next 100000 years (8.33 arcmin in Right Ascension and 6.67 arcmin in declination);

Distance of HR7224 from the Sun and relative movement

HR7224 is distant 628.13 light years from the Sun and it is moving towards the Sun at the speed of 15 kilometers per second.

Distance (parsec) 192.68 pc

Distance (light year) 628.13 ly

Heliocentric radial velocity -15 km/s

Proper Motion RA 0.005 arcsec/year

Proper Motion Dec 0.004 arcsec/year

Spectral properties of HR7224

HR7224 belongs to spectral class A0 HR7224 is also a Si chemically peculiar star.

Absolute magnitude 0.10

Spectral Type A0

Color Index (B-V) -0.15

Temperature of HR7224 12489K

The red dot in the diagram below shows where HR7224 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7224. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR7224

Henry Draper Catalogue HD177410

SAO Catalogue SAO18103

Hipparcos Catalogue HIP93187

Durchmusterung Catalogue BD+69 1018

FK5 Catalogue 3517

General Catalogue of Variable Stars EE Dra

In Evidence

Other stars in Draco