γ Persei (gamma Persei)

Altitude: 20.0° Azimuth: 336.4° Direction: North-North-West

γ Persei is a multiple giant star in the constellation of Perseus.

γ Persei visual magnitude is 2.93. Thanks to its high brightness, γ 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 γ Persei:

Color of γ Persei ⬤

Magnitude of γ Persei 2.93

Class Giant

VISIBILITY RIGHT NOW

γ Persei (gamma Persei) is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 20.0°
Azimuth: 336.4°
Direction: North-North-West

Celestial coordinates and finder chart of γ Persei

γ 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 γ Persei are provided in the following table:

Right Ascension J2000 03h 04m 47s

Declination J2000 +53° 30’ 23”

Galactic Longitude 142.07°

Galactic Latitude -4.34°

Constellation Perseus

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

Finder chart γ Persei (gamma Persei) star

Simplified finder chart for γ Persei (gamma Persei).

Visibility of γ Persei from your location

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

γ Persei (gamma Persei) is circumpolar and transits at 22:14 UTC (altitude: 88.0°)

Digitized Sky Survey image of γ Persei

The image below is a photograph of γ 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 γ Persei is 0 arcsec per year in Right Ascension and -0.005 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of γ Persei. The red arrow shows the motion of γ Persei during the next 100000 years (0.00 arcmin in Right Ascension and -8.33 arcmin in declination);

Distance of γ Persei from the Sun and relative movement

γ Persei is distant 256.29 light years from the Sun and it is moving far from the Sun at the speed of 3 kilometers per second.

Distance (parsec) 78.62 pc

Distance (light year) 256.29 ly

Heliocentric radial velocity 3 km/s

Proper Motion Dec -0.005 arcsec/year

Spectral properties of γ Persei

γ Persei belongs to spectral class G8 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.55

Spectral Type G8III

Color Index (B-V) 0.7

Temperature of γ Persei 5602K

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

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

γ Persei star system properties

γ 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 γ Persei double sysyem:

Main star magnitude 2.93

Secondary star magnitude 11.53

Magnitude difference 8.6

Separation 57 arcsec

Alternative designations of γ Persei

Bayer designation γ Persei
(gamma Persei)

Flamsteed designation 23 Persei

Henry Draper Catalogue HD18925

SAO Catalogue SAO23789

Hipparcos Catalogue HIP14328

Durchmusterung Catalogue BD+52 654

FK5 Catalogue 108

Aitken Double Star Catalogue ADS2324

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In Evidence

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