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physical object > natural object > celestial body > collection of stars > star system > binary star > close binary > eclipsing binary > epsilon Aurigae
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epsilon Aurigae comparison table
Subject has spectral type is part of has surface temperature has orbital period is an instance of has optical brightness variation has observational problem has color has distance has absorption line has abundance has primary is a kind of has name designated with has observable variation time scale has definition has number of star
eclipsing binary  greater than 1000 Kelvin  0.2 magnitudes or greatersome difficulty in distinguishing between various kinds   half the stars in the solar neighborhood are members of star systems close binary
  1. R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
  2. 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
  3. 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
  4. V 335, V 336, etc., when the double letter designations are exhausted
within a period of decadesEclipsing variables whose orbital plane lies so nearly in the line of sight that eclipses, as seen from the Earth, can occur and can be detected from their light curves.2
white supergiantO, B, A, and early F 10000 K    white H I  A star  A supergiant star with a spectral type of A. White supergiants are rare; the nearest is Deneb, which lies 1500 light-years away. 
epsilon AurigaeO, B, A, and early FAuriga10000 K27 yearseclipsing binary0.2 magnitudes or greatersome difficulty in distinguishing between various kindswhite1 kpcH Ihalf the stars in the solar neighborhood are members of star systemsA8 Ia 
  1. R, S, T, U, V, W, X, Y, or Z and the genitive of the latin constellation name
  2. 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
  3. 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
  4. V 335, V 336, etc., when the double letter designations are exhausted
within a period of decadesAn eclipsing binary with an invisible supergiant companion. The primary is an extremely luminous A8 Ia supergiant of 30 Msun in a post-main-sequence stage of evolution; the secondary may be a collapsed star or black hole. It has at least six components.2

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