HR8157

Above the horizon. Rise: 16:39 | Tran: 4:14 | Set: 15:44

Alt: 0.04° Az: 354.51° Direction: South

HR8157 is a variable bright giant star of spectral class F1 in the constellation of Cygnus.

HR8157 visual magnitude is 5.83. Because of its faintness, HR8157 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 HR8157. The red arrow shows the motion of HR8157 during the next 10000 years (1.83 arcmin in Right Ascension and -1.00 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 20m 23s

Declination +38° 20’ 45”

Hour Angle 11h 31m 57s

Sidereal Time 08h 52m 20s

J2000

Right Ascension 21h 19m 22s

Declination +38° 14’ 14”

Galactic Coordinates

Galactic Longitude 83.62°

Galactic Latitude -7.95°

Finder Chart

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Finder chart for HR8157.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.83

Class Bright giant

Absolute magnitude -4.33

Spectral Type F1II

Color Index (B-V) 0.5

Temperature 6389K

The red dot in the diagram below shows where HR8157 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8157. Attribution: Richard Powell / CC BY-SA

Distance, Radial Speed, Proper Motion

HR8157 is distant 3,505.38 light years from the Sun and it is moving far from the Sun at the speed of 8 kilometers per second.

Distance (parsec) 1,075.27

Distance (light year) 3,505.38

Radial Speed 8 km/s

Proper Motion RA 0.011 arcsec/y

Proper Motion Dec -0.006"/y

Alternative Designations

Henry Draper Catalogue HD203156

SAO Catalogue SAO71203

Hipparcos Catalogue HIP105269

Durchmusterung Catalogue BD+37 4271

General Catalogue of Variable Stars V1334 Cyg

Aitken Double Star Catalogue ADS14859

Visibility from Your Location

Today's HR8157 rise, transit and set times from Greenwich, UK are the following (all times relative to the local timezone Europe/London):

Azimuth: 51.7° RISE 16:39

Max altitude: 76.9° TRANSIT 4:14

Azimuth: 308.3° SET 15:44

Set Location

Other stars in Cygnus