HR7798

Above the horizon. Rise: 21:52 | Tran: 1:27 | Set: 5:02

Alt: 6.74° Az: 334.12° Direction: North-North-West

HR7798 is a variable hypergiant star of spectral class K0 in the constellation of Cygnus.

HR7798 visual magnitude is 5.58. Because of its faintness, HR7798 is visible to the naked eye only from locations with very dark skies, while it is not visible at all from skies affected by light pollution.

DSS2 image of HR7798. The red arrow shows the motion of HR7798 during the next 10000 years (4.67 arcmin in Right Ascension and 7.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 20h 22m 55s

Declination +45° 52’ 39”

Hour Angle 02h 34m 03s

Sidereal Time 22h 56m 58s

J2000

Right Ascension 20h 22m 05s

Declination +45° 47’ 42”

Galactic Coordinates

Galactic Longitude 82.7°

Galactic Latitude 5.04°

Finder Chart

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Finder chart for HR7798.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.58

Class Hypergiant

Absolute magnitude 0.06

Spectral Type K0III

Color Index (B-V) 1.08

Temperature 4559K

The red dot in the diagram below shows where HR7798 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR7798. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR7798 is distant 414.76 light years from the Sun and it is moving towards the Sun at the speed of 22 kilometers per second.

Distance (parsec) 127.23

Distance (light year) 414.76

Radial Speed -22 km/s

Proper Motion RA 0.028 arcsec/y

Proper Motion Dec 0.044"/y

Alternative Designations

Henry Draper Catalogue HD194152

SAO Catalogue SAO49531

Hipparcos Catalogue HIP100437

Durchmusterung Catalogue BD+45 3152

General Catalogue of Variable Stars 13050

Visibility from Your Location

Today's HR7798 rise, transit and set times from South Grafton, Australia are the following (all times relative to the local timezone Australia/Sydney):

Azimuth: 44.1° RISE 21:52

Max altitude: 14.4° TRANSIT 1:27

Azimuth: 315.9° SET 5:02

Name:	South Grafton, Australia
Latitude:	29° 42' 27.4" S
Longitude:	152° 55' 33.6" E
Timezone:	Australia/Sydney

Set Location

Other stars in Cygnus