3 Persei

3 Persei is a hypergiant star in the constellation of Perseus.

3 Persei visual magnitude is 5.69. Because of its reltive faintness, 3 Persei should be visible only from locations with dark skyes, while it is not visible at all from skyes affected by light pollution.

The table below summarizes the key facts about 3 Persei:

Color of 3 Persei ⬤

Magnitude of 3 Persei 5.69

Class Hypergiant

VISIBILITY RIGHT NOW 3 Persei is above the horizon from Greenwich, United Kingdom edit_location_alt. Altitude: 21°.

Celestial coordinates and finder chart of 3 Persei

3 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 3 Persei are provided in the following table:

Right Ascension J2000 01h 58m 33s

Declination J2000 +49° 12’ 15”

Galactic Longitude 134.06°

Galactic Latitude -12.21°

Constellation Perseus

The simplified sky map below shows the position of 3 Persei in the sky:

Simplified finder chart for 3 Persei.

Visibility of 3 Persei from your location

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

3 Persei is circumpolar and transits at 09:12 UTC (altitude: 87.7°)

Digitized Sky Survey image of 3 Persei

The image below is a photograph of 3 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 3 Persei is 0.01 arcsec per year in Right Ascension and 0.038 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 3 Persei. The red arrow shows the motion of 3 Persei during the next 10000 years (1.67 arcmin in Right Ascension and 6.33 arcmin in declination);

Distance of 3 Persei from the Sun and relative movement

3 Persei is distant 246.04 light years from the Sun

Distance (parsec) 75.47 pc

Distance (light year) 246.04 ly

Proper Motion RA 0.01 arcsec/year

Proper Motion Dec 0.038 arcsec/year

Spectral properties of 3 Persei

3 Persei belongs to spectral class K0 and has a luminosity class of IV corresponding to a hypergiant star.

Absolute magnitude 1.30

Spectral Type K0IV

Color Index (B-V) 1.01

Temperature of 3 Persei 4719K

The red dot in the diagram below shows where 3 Persei is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 3 Persei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 3 Persei

Flamsteed designation 3 Persei

Henry Draper Catalogue HD11949

SAO Catalogue SAO37665

Hipparcos Catalogue HIP9222

Durchmusterung Catalogue BD+48 576

In Evidence

Other stars in Perseus