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physical object > natural object > celestial body > star > hydrogen-deficient star > hydrogen-deficient C star
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hydrogen-deficient C star comparison table
Subject has spectral type has extent has age has surface temperature is an instance of has velocity has surface density has optical brightness variation has star surface temperature has V magnitude has parallax has light curve has observational problem has position on celestial sphere has location has angular momentum has radiation at surface has acronym has B magnitude has temperature has prototype has recovery time has spectra has proper motion has amplitude has energy source has energy production has catalog has outburst start time has absolute magnitude is a kind of has U magnitude has volume has hydrogen line strength has momentum has peak brightness has apparent magnitude has material has mass has name designated with has observable variation time scale has synonym has definition has luminosity class
R Coronae Borealis variableF star, G star  greater than 1000 Kelvinsupergiantdetermined from proper motion and radial velocitywhich depends on luminosity class0.2 magnitudes or greater  from the point of view of Earth's orbit some difficulty in distinguishing between various kindsfrom the point of view of Earthor center of gravity which is diffused out from the hotter coreCV  R Corona Borealis   8 magnitudesgravitational contraction and or fusionwhich takes place primarily within the corestar catalog  cataclysmic variable  weak   hydrogen, heliumgreater than 0.08 the sun's mass
  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 decadesexplosive variableA very luminous helium-rich, carbon-rich, hydrogen-poor eruptive variable supergiant whose light declines up to 8 magnitudes at irregular intervals.I

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