57 Persei

Altitude: 23.6° Azimuth: 49.6° Direction: North-East

57 Persei is a multiple hypergiant star in the constellation of Perseus.

57 Persei visual magnitude is 6.09. Because of its reltive faintness, 57 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 57 Persei:

Color of 57 Persei ⬤

Magnitude of 57 Persei 6.09

Class Hypergiant

VISIBILITY RIGHT NOW

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

Altitude: 23.6°
Azimuth: 49.6°
Direction: North-East

Celestial coordinates and finder chart of 57 Persei

57 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 57 Persei are provided in the following table:

Right Ascension J2000 04h 33m 24s

Declination J2000 +43° 03’ 50”

Galactic Longitude 160.02°

Galactic Latitude -3.27°

Constellation Perseus

The simplified sky map below shows the position of 57 Persei in the sky:

Simplified finder chart for 57 Persei.

Visibility of 57 Persei from your location

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

57 Persei is circumpolar and transits at 23:39 UTC (altitude: 81.6°)

Digitized Sky Survey image of 57 Persei

The image below is a photograph of 57 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 57 Persei is 0.004 arcsec per year in Right Ascension and 0.004 arcsec per year in Declination and the associated displacement for the next 100000 years is represented with the red arrow.

DSS2 image of 57 Persei. The red arrow shows the motion of 57 Persei during the next 100000 years (6.67 arcmin in Right Ascension and 6.67 arcmin in declination);

Distance of 57 Persei from the Sun and relative movement

57 Persei is distant 210.59 light years from the Sun and it is moving towards the Sun at the speed of 23 kilometers per second.

Distance (parsec) 64.60 pc

Distance (light year) 210.59 ly

Heliocentric radial velocity -23 km/s

Proper Motion RA 0.004 arcsec/year

Proper Motion Dec 0.004 arcsec/year

Spectral properties of 57 Persei

57 Persei belongs to spectral class F0 and has a luminosity class of V corresponding to a hypergiant star.

Absolute magnitude 2.04

Spectral Type F0V

Color Index (B-V) 0.38

Temperature of 57 Persei 6989K

The red dot in the diagram below shows where 57 Persei is situated in the Hertzsprung–Russell diagram.

H-R diagram showing the position of 57 Persei. Attribution: Richard Powell / CC BY-SA

57 Persei star system properties

57 Persei is a visual double star which can be observed with binoculars or small telescopes. The table below shows key information about the 57 Persei double sysyem:

Main star magnitude 6.09

Secondary star magnitude 6.79

Magnitude difference 0.7

Separation 116.2 arcsec

Alternative designations of 57 Persei

Flamsteed designation 57 Persei

Henry Draper Catalogue HD28704

SAO Catalogue SAO39604

Hipparcos Catalogue HIP21242

Durchmusterung Catalogue BD+42 990

FK5 Catalogue 1124

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