HR8221

HR8221 is a variable star in the constellation of Pegasus.

HR8221 visual magnitude is 6.44. Because of its reltive faintness, HR8221 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 HR8221:

Color of HR8221 ⬤

Magnitude of HR8221 6.44

Class

VISIBILITY RIGHT NOW HR8221 is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 34°.

Celestial coordinates and finder chart of HR8221

HR8221 is situated close to the celestial equator, as such, it is at least partly visible from both hemispheres in certain times of the year. Celestial coordinates for the J2000 equinox as well as galactic coordinates of HR8221 are provided in the following table:

Right Ascension J2000 21h 28m 59s

Declination J2000 +17° 54’ 20”

Galactic Longitude 69.67°

Galactic Latitude -23.41°

Constellation Pegasus

The simplified sky map below shows the position of HR8221 in the sky:

Simplified finder chart for HR8221.

Visibility of HR8221 from your location

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

Today's HR8221 rise, transit and set times from Greenwich, United Kingdom edit_location_alt are the following (all times relative to the local timezone Europe/London):

Azimuth: 72.1° RISE 22:10

Max altitude: 56.4° TRANSIT 5:47

Azimuth: 287.9° SET 13:20

RIGHT NOW HR8221 is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of HR8221

The image below is a photograph of HR8221 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 HR8221 is -0.015 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 HR8221. The red arrow shows the motion of HR8221 during the next 10000 years (-2.50 arcmin in Right Ascension and -0.17 arcmin in declination);

Distance of HR8221 from the Sun and relative movement

HR8221 is distant 544.24 light years from the Sun and it is moving towards the Sun at the speed of 12 kilometers per second.

Distance (parsec) 166.94 pc

Distance (light year) 544.24 ly

Heliocentric radial velocity -12 km/s

Proper Motion RA -0.015 arcsec/year

Proper Motion Dec -0.001 arcsec/year

Spectral properties of HR8221

HR8221 belongs to spectral class K5

Absolute magnitude 0.33

Spectral Type K5

Color Index (B-V) 1.39

Temperature of HR8221 3967K

The red dot in the diagram below shows where HR8221 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8221. Attribution: Richard Powell / CC BY-SA

Alternative designations of HR8221

Henry Draper Catalogue HD204560

SAO Catalogue SAO107168

Hipparcos Catalogue HIP106064

Durchmusterung Catalogue BD+17 4592

General Catalogue of Variable Stars 13738

In Evidence

Other stars in Pegasus