Alpha Persei

Also known as Mirfak, 33 Persei, * alf Per

star in the constellation Perseus

Astronomical data · SIMBAD

Object type: V*
Spectral type: F5Ib
Distance: 506 light-years
Redshift: z = -0.0000071982872668074904
Coordinates: RA 51.0807° · Dec 49.8612°

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via SIMBAD · CDS Strasbourg

Key facts

Constellation: Perseus
Right ascension: 03 24 19.37009
Declination: +49 ° 51 ′ 40.2455 ″
Spectral type: F5 Ib
U b color index: +0.38
B v color index: +0.483

via Wikipedia infobox

Wikidata facts

Distance from Earth: 156
Radius: 55.0
Mass: 7.3
Image: Alpha Persei Cluster.png

Show 16 more facts

spectral class: F3I
catalog code: UBV M 40922
stellar rotational velocity: 18
apparent magnitude: 0.54
right ascension: 51.08070871833
declination: 49.86117929306
effective temperature: 6350
parallax: 6.44
radial velocity: -2.158
surface gravity: 20.4
metallicity: 7.3
luminosity: 5000
absolute magnitude: -5.1
right ascension component of proper motion: 25
declination component of proper motion: -24
age estimated by a dating method: 0.041

Sources (3)

via Wikidata · CC0

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Article

Alpha Persei (Latinized from α Persei, abbreviated Alpha Per, α Per), formally named Mirfak (pronounced /ˈmɜːrfæk/ or /ˈmɪərfæk/), is the brightest star in the northern constellation of Perseus, outshining the constellation's best-known star, Algol (β Persei). Alpha Persei has an apparent visual magnitude of 1.8, and is a circumpolar star when viewed from mid-northern latitudes.

Alpha Persei lies in the midst of a cluster of stars named as the eponymous Alpha Persei Cluster, or Melotte 20, which is easily visible in binoculars and includes many of the fainter stars in the constellation. Determined distance using the trigonometric parallax, places the star 510 light-years (160 parsecs) away.