Your guide to the Solar System and the night sky
🌎 Location: Greenwich, United Kingdom [change]

ζ Persei (zeta Persei)

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

ζ Persei visual magnitude is 2.85. Thanks to its high brightness, ζ Persei is clearly visible when observed from locations with dark skyes, and should be also quite easily visible from light polluted areas.

The table below summarizes the key facts about ζ Persei:

ζ Persei (zeta Persei) is above the horizon from Greenwich, United Kingdom [change]. Altitude: 66°.

Celestial coordinates and finder chart of ζ Persei

ζ Persei is situated north of the celestial equator, as such, it is more easily visible from the northern hemisphere. Celestial coordinates for the J2000 equinox as well as galactic coordinates of ζ Persei are provided in the following table:

03h 54m 07s
+31° 53’ 00”

The simplified sky map below shows the position of ζ Persei in the sky:

Finder chart ζ Persei (zeta Persei) star
Simplified finder chart for ζ Persei (zeta Persei).

Visibility of ζ Persei from your location

Location: Greenwich, United Kingdom [change]
Latitude: 51° 28’ 47” N
Longitude: 0° 00’ 00” E
Timezone: Europe/London

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

Azimuth: 58.1°
Max altitude: 70.4°
Azimuth: 301.9°
ζ Persei (zeta Persei) is above the horizon from Greenwich, United Kingdom

Digitized Sky Survey image of ζ Persei

The image below is a photograph of ζ Persei from the Digitized Sky Survey 2 (DSS2 - see the credits section) taken in the red channel. The area of sky represented in the image is 0.5x0.5 degrees (30x30 arcmins). The proper motion of ζ Persei is 0.006 arcsec per year in Right Ascension and -0.01 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

Image of ζ Persei (zeta Persei) star
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);

Distance of ζ Persei from the Sun and relative movement

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.

301.20 pc
981.93 ly
20 km/s
0.006 arcsec/year
-0.01 arcsec/year

Spectral properties of ζ Persei

ζ Persei belongs to spectral class B1 and has a luminosity class of I corresponding to a supergiant star.


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

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

ζ Persei 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:

12.9 arcsec

Alternative designations of ζ Persei

ζ Persei
(zeta Persei)