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physical object > natural object > celestial body > collection of stars > star system > binary star > close binary > eclipsing binary > beta Persei star

beta Persei star comparison table

Subject	has spectral type	is part of	has extent	has age	has surface temperature	has orbital period	has velocity	is an instance of	has surface density	has star surface temperature	has optical brightness variation	has V magnitude	has parallax	has observational problem	has light curve	has position on celestial sphere	has location	has angular momentum	has distance	has radiation at surface	has B magnitude	has temperature	has abundance	has prototype	has spectra	has period	has proper motion	has amplitude	has energy source	has energy production	has eclipse duration	has catalog	has absolute magnitude	has U magnitude	has volume	has momentum	has apparent magnitude	has material	has mass	has name designated with	has observable variation time scale	has synonym	has definition	has number of star
Algol		Perseus			greater than 1000 Kelvin		determined from proper motion and radial velocity	beta Persei star	which depends on luminosity class		0.2 magnitudes or greater		from the point of view of Earth's orbit	some difficulty in distinguishing between various kinds		from the point of view of Earth	or center of gravity		25 pc	which is diffused out from the hotter core			half the stars in the solar neighborhood are members of star systems	Algol					gravitational contraction and or fusion	which takes place primarily within the core		star catalog						hydrogen, helium	greater than 0.08 the sun's mass	R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name RR, RS, RT, RU, RV, RW, RX, RY, or RZ and the genitive of the latin constellation name when the single letter designations are exhausted AA...AZ, BB...BZ, etc. (omitting J), which ends with QQ...QZ and the genitive of the latin constellation namewhen the RR...RZ designations are exhausted V 335, V 336, etc., when the double letter designations are exhausted	within a period of decades	Demon star	An eclipsing system of at least three components (B8 V, K0, Am). Period of components A and B is about 68.8 hours; period of components A, B, and C is about 1.9 years. Long term observations also indicate a massive, unseen fourth component with a period of about 190 years. Algol is also an erratic radio source of about 0.5 AU diameter.	2

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