ζ Persei (zeta Persei)

Below the horizon. Rise: 1:29 | Tran: 10:52 | Set: 20:15

Alt: -6.01° Az: 9.28° Direction: South-West

ζ Persei is a variable and multiple supergiant star of spectral class B1 in the constellation of Perseus.

ζ Persei visual magnitude is 2.85. Because of its brightness, ζ Persei is clearly visible to the naked eye when observed from locations with dark skies, and should be also quite easily visible from light polluted areas.

DSS2 image of ζ Persei. The red arrow shows the motion of ζ Persei during the next 10000 years (1.00 arcmin in Right Ascension and -1.67 arcmin in declination);

Celestial Coordinates

Apparent

Right Ascension 03h 55m 44s

Declination +31° 57’ 25”

Hour Angle 12h 43m 35s

Sidereal Time 16h 39m 19s

J2000

Right Ascension 03h 54m 07s

Declination +31° 53’ 00”

Galactic Coordinates

Galactic Longitude 162.29°

Galactic Latitude -16.69°

Finder Chart

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Finder chart for ζ Persei (zeta Persei).

Magnitude, Color, Spectral Class

Color ⬤

Magnitude 2.85

Class Supergiant

Absolute magnitude -4.54

Spectral Type B1I

Color Index (B-V) 0.12

Temperature 8839K

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

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

Star System Properties

ζ 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 ζ Persei double sysyem:

Main star magnitude 2.85

Secondary star magnitude 9.35

Magnitude difference 6.5

Separation 12.9 arcsec

Distance, Radial Speed, Proper Motion

ζ Persei is distant 981.93 light years from the Sun and it is moving far from the Sun at the speed of 20 kilometers per second.

Distance (parsec) 301.20

Distance (light year) 981.93

Radial Speed 20 km/s

Proper Motion RA 0.006 arcsec/y

Proper Motion Dec -0.01"/y

Alternative Designations

Bayer designation ζ Persei
(zeta Persei)

Flamsteed designation 44 Persei

Henry Draper Catalogue HD24398

SAO Catalogue SAO56799

Hipparcos Catalogue HIP18246

Durchmusterung Catalogue BD+31 666

FK5 Catalogue 144

General Catalogue of Variable Stars 1397

Aitken Double Star Catalogue ADS2843

Visibility from Your Location

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

Azimuth: 58.0° RISE 1:29

Max altitude: 70.5° TRANSIT 10:52

Azimuth: 302.0° SET 20:15

Set Location

Other stars in Perseus