5 Persei

Above the horizon. Circumpolar today

Alt: 39.70° Az: 43.75° Direction: North-East

5 Persei is a variable and multiple supergiant star of spectral class B5 in the constellation of Perseus.

5 Persei visual magnitude is 6.36. Because of its faintness, 5 Persei 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 5 Persei. The red arrow shows the motion of 5 Persei during the next 10000 years (-2.17 arcmin in Right Ascension and 0.83 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 02h 13m 16s

Declination +57° 45’ 51”

Hour Angle 17h 44m 03s

Sidereal Time 19h 57m 20s

J2000

Right Ascension 02h 11m 29s

Declination +57° 38’ 44”

Galactic Coordinates

Galactic Longitude 133.51°

Galactic Latitude -3.57°

Finder Chart

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Finder chart for 5 Persei.

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 6.36

Class Supergiant

Absolute magnitude -3.10

Spectral Type B5I

Color Index (B-V) 0.33

Temperature 7276K

The red dot in the diagram below shows where 5 Persei is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 5 Persei. Attribution: Richard Powell / CC BY-SA

Star System Properties

5 Persei is a visual double star which can be observed only with the help of very large telescopes. The table below shows key information about the 5 Persei double sysyem:

Main star magnitude 6.36

Secondary star magnitude 13.26

Magnitude difference 6.9

Separation 60 arcsec

Distance, Radial Speed, Proper Motion

5 Persei is distant 2,546.88 light years from the Sun and it is moving towards the Sun at the speed of 34 kilometers per second.

Distance (parsec) 781.25

Distance (light year) 2,546.88

Radial Speed -34 km/s

Proper Motion RA -0.013 arcsec/y

Proper Motion Dec 0.005"/y

Alternative Designations

Flamsteed designation 5 Persei

Henry Draper Catalogue HD13267

SAO Catalogue SAO23011

Hipparcos Catalogue HIP10227

Durchmusterung Catalogue BD+56 438

General Catalogue of Variable Stars Var?

Aitken Double Star Catalogue ADS1685

Visibility from Your Location

5 Persei is circumpolar and transits at 10:04 UTC (altitude: 83.7°)

Set Location

Other stars in Perseus