σ Persei (sigma Persei)

Above the horizon. Circumpolar today

Alt: 61.32° Az: 78.87° Direction: East

σ Persei is a variable giant star of spectral class K3 in the constellation of Perseus.

σ Persei visual magnitude is 4.36. Because of its moderate brightness, σ Persei is easily visible to the naked eye from locations with dark skies, while it might be barely visible, or not visible at all, from light-polluted skies.

DSS2 image of σ Persei. The red arrow shows the motion of σ Persei during the next 10000 years (0.67 arcmin in Right Ascension and 3.33 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 03h 32m 22s

Declination +48° 04’ 50”

Hour Angle 21h 00m 42s

Sidereal Time 00h 33m 04s

J2000

Right Ascension 03h 30m 34s

Declination +47° 59’ 43”

Galactic Coordinates

Galactic Longitude 148.48°

Galactic Latitude -6.83°

Finder Chart

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Finder chart for σ Persei (sigma Persei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 4.36

Class Giant

Absolute magnitude -0.81

Spectral Type K3III

Color Index (B-V) 1.35

Temperature 4034K

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

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

Distance, Radial Speed, Proper Motion

σ Persei is distant 353.20 light years from the Sun and it is moving far from the Sun at the speed of 16 kilometers per second.

Distance (parsec) 108.34

Distance (light year) 353.20

Radial Speed 16 km/s

Proper Motion RA 0.004 arcsec/y

Proper Motion Dec 0.02"/y

Alternative Designations

Bayer designation σ Persei
(sigma Persei)

Flamsteed designation 35 Persei

Henry Draper Catalogue HD21552

SAO Catalogue SAO38890

Hipparcos Catalogue HIP16335

Durchmusterung Catalogue BD+47 843

FK5 Catalogue 124

General Catalogue of Variable Stars 1167

Visibility from Your Location

σ Persei (sigma Persei) is circumpolar and transits at 11:46 UTC (altitude: 86.6°)

In Evidence

Other stars in Perseus

σ Persei (sigma Persei)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location

Set Location

In Evidence

Other stars in Perseus

σ Persei (sigma Persei)

Celestial Coordinates

Apparent

J2000

Galactic Coordinates

Finder Chart

Magnitude, Color, Spectral Class

Distance, Radial Speed, Proper Motion

Alternative Designations

Visibility from Your Location