π Persei (pi Persei)

π Persei is a main-sequence star in the constellation of Perseus.

π Persei visual magnitude is 4.7. Because of its moderate brightness, π Persei should be easily visible from locations with dark skyes, while it can be barely visible, or not visible at all, from skyes affected by light pollution.

The table below summarizes the key facts about π Persei:

Color of π Persei ⬤

Magnitude of π Persei 4.7

Class Main-sequence

VISIBILITY RIGHT NOW π Persei (pi Persei) is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 13°.

Celestial coordinates and finder chart of π Persei

π 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 π Persei are provided in the following table:

Right Ascension J2000 02h 58m 45s

Declination J2000 +39° 39’ 46”

Galactic Longitude 148.04°

Galactic Latitude -16.92°

Constellation Perseus

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

Simplified finder chart for π Persei (pi Persei).

Visibility of π Persei from your location

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

π Persei (pi Persei) is circumpolar and transits at 10:12 UTC (altitude: 78.2°)

Digitized Sky Survey image of π Persei

The image below is a photograph of π 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 π Persei is 0.024 arcsec per year in Right Ascension and -0.043 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of π Persei. The red arrow shows the motion of π Persei during the next 10000 years (4.00 arcmin in Right Ascension and -7.17 arcmin in declination);

Distance of π Persei from the Sun and relative movement

π Persei is distant 325.35 light years from the Sun and it is moving far from the Sun at the speed of 14 kilometers per second.

Distance (parsec) 99.80 pc

Distance (light year) 325.35 ly

Heliocentric radial velocity 14 km/s

Proper Motion RA 0.024 arcsec/year

Proper Motion Dec -0.043 arcsec/year

Spectral properties of π Persei

π Persei belongs to spectral class A2 and has a luminosity class of V corresponding to a main-sequence star.

Absolute magnitude -0.30

Spectral Type A2V

Color Index (B-V) 0.06

Temperature of π Persei 9434K

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

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

Alternative designations of π Persei

Bayer designation π Persei
(pi Persei)

Flamsteed designation 22 Persei

Henry Draper Catalogue HD18411

SAO Catalogue SAO56047

Hipparcos Catalogue HIP13879

Durchmusterung Catalogue BD+39 681

FK5 Catalogue 2207

In Evidence

Other stars in Perseus