HR8164

Above the horizon. Circumpolar today

Alt: 81.86° Az: 335.47° Direction: North-North-West

HR8164 is a multiple supergiant star of spectral class M1 in the constellation of Cepheus.

HR8164 visual magnitude is 5.66. Because of its faintness, HR8164 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 HR8164. The red arrow shows the motion of HR8164 during the next 100000 years (8.33 arcmin in Right Ascension and -1.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 21h 19m 56s

Declination +58° 43’ 44”

Hour Angle 00h 26m 00s

Sideral Time 21h 45m 57s

J2000

Right Ascension 21h 19m 15s

Declination +58° 37’ 24”

Galactic Coordinates

Galactic Longitude 98.18°

Galactic Latitude 6.36°

Finder Chart

Simplified finder chart for HR8164.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 5.66

Class Supergiant

Absolute magnitude -4.59

Spectral Type M1I

Color Index (B-V) 1.38

Temperature 3983K

The red dot in the diagram below shows where HR8164 is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of HR8164. Attribution: Richard Powell / CC BY-SA

Star System Properties

HR8164 is a visual double star which can be observed with the help of small or medium telescopes. The table below shows key information about the HR8164 double sysyem:

Main star magnitude 5.66

Secondary star magnitude 9.46

Magnitude difference 3.8

Separation 4.6 arcsec

Distance, Radial Speed, Proper Motion

HR8164 is distant 3,662.92 light years from the Sun and it is moving towards the Sun at the speed of 21 kilometers per second.

Distance (parsec) 1,123.60

Distance (light year) 3,662.92

Radial Speed -21 km/s

Proper Motion RA 0.005 arcsec/y

Proper Motion Dec -0.001"/y

Alternative Designations

Henry Draper Catalogue HD203338

SAO Catalogue SAO33318

Hipparcos Catalogue HIP105259

Durchmusterung Catalogue BD+58 2249

Aitken Double Star Catalogue ADS14864

Visibility from Your Location

HR8164 is circumpolar and transits at 20:16 UTC (altitude: 82.8°)

Set Location

Other stars in Cepheus