Beta Persei A/B/C

The red dot shows the location of Algol in Perseus.
Observation data
Epoch J2000      Equinox J2000
Constellation Perseus
Right ascension 03
Declination +40° 57′ 20.332″
Apparent magnitude (V) 2.12
Characteristics
Spectral type B8V (A) /A5V (C)
U−B color index −0.37
B−V color index −0.05
Variable type Eclipsing binary
Astrometry
Radial velocity (Rv) 3.7 km/s
Proper motion (μ) RA: 2.39 mas/yr
Dec.: −1.44 mas/yr
Parallax (π) 35.14 ± 0.90 mas
Distance 93 ± 2 ly
(28.5 ± 0.7 pc)
Absolute magnitude (MV) −0.15
Details
Mass 3.59/0.79/1.67 M
Radius 4.13/3.0/0.9 R
Luminosity 98/3.4/4.1 L
Temperature 9,200/4,500/8,500 K
Metallicity Not available
Rotation 65 km/s
Age < 3×108 years
Other designations
Algol, Gorgona, Gorgonea Prima, Demon Star, El Ghoul, 26 Per, GJ 9110, HR 936, BD +40°673, HD 19356, GCTP 646.00, SAO 38592, FK5 111, Wo 9110, ADS 2362, WDS 03082+4057A, HIP 14576

Get more info about Algol in Wikipedia

This article uses material from the Wikipedia article
Algol, which is released under the Creative Commons Attribution-Share-Alike License 3.0