4 Persei

Altitude: 21.4° Azimuth: 24.4° Direction: North-North-East

4 Persei is a giant star in the constellation of Perseus.

4 Persei visual magnitude is 5.04. Because of its reltive faintness, 4 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 4 Persei:

Color of 4 Persei ⬤

Magnitude of 4 Persei 5.04

Class Giant

VISIBILITY RIGHT NOW

4 Persei is above the horizon from Greenwich, United Kingdom edit_location_alt.

Altitude: 21.4°
Azimuth: 24.4°
Direction: North-North-East

Celestial coordinates and finder chart of 4 Persei

4 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 4 Persei are provided in the following table:

Right Ascension J2000 02h 02m 18s

Declination J2000 +54° 29’ 14”

Galactic Longitude 133.19°

Galactic Latitude -6.97°

Constellation Perseus

The simplified sky map below shows the position of 4 Persei in the sky:

Simplified finder chart for 4 Persei.

Visibility of 4 Persei from your location

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

4 Persei is circumpolar and transits at 21:16 UTC (altitude: 87.0°)

Digitized Sky Survey image of 4 Persei

The image below is a photograph of 4 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 4 Persei is 0.035 arcsec per year in Right Ascension and -0.002 arcsec per year in Declination and the associated displacement for the next 10000 years is represented with the red arrow.

DSS2 image of 4 Persei. The red arrow shows the motion of 4 Persei during the next 10000 years (5.83 arcmin in Right Ascension and -0.33 arcmin in declination);

Distance of 4 Persei from the Sun and relative movement

4 Persei is distant 739.23 light years from the Sun and it is moving towards the Sun at the speed of 2 kilometers per second.

Distance (parsec) 226.76 pc

Distance (light year) 739.23 ly

Heliocentric radial velocity -2 km/s

Proper Motion RA 0.035 arcsec/year

Proper Motion Dec -0.002 arcsec/year

Spectral properties of 4 Persei

4 Persei belongs to spectral class B8 and has a luminosity class of III corresponding to a giant star.

Absolute magnitude -1.74

Spectral Type B8III

Color Index (B-V) -0.08

Temperature of 4 Persei 11247K

The red dot in the diagram below shows where 4 Persei is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 4 Persei. Attribution: Richard Powell / CC BY-SA

Alternative designations of 4 Persei

Flamsteed designation 4 Persei

Henry Draper Catalogue HD12303

SAO Catalogue SAO22859

Hipparcos Catalogue HIP9505

Durchmusterung Catalogue BD+53 439

FK5 Catalogue 1054

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In Evidence

Other stars in Perseus