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B star comparison table
Subject has right ascension has spectral type has declination is part of has orbital period has inclination is an instance of has optical brightness variation has V magnitude has eccentricity has observational problem has been observ has symbol has B-V magnitude has distance has abundance has period is usually part of has eclipse duration has wavelength is a kind of has apparent magnitude has mass has name designated with has observable variation time scale has emission line has synonym has definition has luminosity class has number of star
Achernar1 37 42.9B5-57 14 12Milky Way  subgiant 0.46  for many centuries -0.1635 pc  asterism   brighter than 5greater than 0.08 the sun's mass   HR 472 IV 
Alpha Andromedae00 08 23.2B8IVpMnHg+29 05 26Milky Way  naked eye star 2.06  for many centuries -0.11   asterism   brighter than 5greater than 0.08 the sun's mass   HR 15 IV 
Alpha Columbae05 39 38.9B7IVe-34 04 27Milky Way  naked eye star 2.64  for many centuries -0.12   asterism   brighter than 5greater than 0.08 the sun's mass   HR 1956 IV 
Alpha Gruis22 8 13.9B7IV-46 57 40Milky Way  naked eye star 1.74  for many centuries -0.13   asterism   brighter than 5greater than 0.08 the sun's mass   HR 8425 IV 
Alpha Leonis10 8 22.3B7V+11 58 2Milky Way  naked eye star 1.35  for many centuriesd-0.11   asterism   brighter than 5greater than 0.08 the sun's mass   HR 3982 V 
Alpha Lupi14 41 55.7B1.5III-47 23 17Milky Way  naked eye star 2.30  for many centuries -0.20   asterism   brighter than 5greater than 0.08 the sun's mass   HR 5469 III 
Alpha Muscae12 37 11.0B2IV-V-69 08 08Milky Way  naked eye star 2.69  for many centuries -0.20   asterism   brighter than 5greater than 0.08 the sun's mass   HR 4798 IV 
Alpha Pavonis20 25 38.8B2IV-56 44 07Milky Way  naked eye star 1.94  for many centuries -0.20   asterism   brighter than 5greater than 0.08 the sun's mass   HR 7790 IV 
Alpha Pyxidis08 43 35.5B1.5III-33 11 11Milky Way  naked eye star 3.68  for many centuries -0.18   asterism   brighter than 5greater than 0.08 the sun's mass   HR 3468 III 
Alpha Sculptoris0 58 36.3B7IIIp-29 21 28Milky Way  naked eye star 4.31  for many centuries -0.16   asterism   brighter than 5greater than 0.08 the sun's mass   HR 280 II 
Alpha Telescopii18 26 58.3B3IV-45 58 06Milky Way  naked eye star 3.51  for many centuries -0.17   asterism   brighter than 5greater than 0.08 the sun's mass   HR 6897 IV 
Be star       0.2 magnitudes or greater  some difficulty in distinguishing between various kinds         B star greater 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 decadesat least one of the Balmer lines at some time Non-supergiant B-type stars, which have shown emission in at least one of the Balmer lines at some time.  
Bellatrix B2 III    giant       80 pc       greater than 0.08 the sun's mass   gamma OrionisA B2 III star.III 
Beta Crucis12 47 43.3B0.5III-59 41 19Milky Way  naked eye star 1.25  for many centuries -0.23   asterism   brighter than 5greater than 0.08 the sun's mass   HR 4853 III 
Beta Librae15 17 0.3B8V-9 22 59Milky Way  naked eye star 2.61  for many centuriesd-0.11   asterism   brighter than 5greater than 0.08 the sun's mass   HR 5685 V 
Bp star O, B, A, and early F                  B star greater than 0.08 the sun's mass    Peculiar B stars whose spectra show a deficiency in helium and in which the lines of one or several elements are abnormally enhanced. Traditionally the most important subgroups are Si λ4200, Hg-Mn and Cr-Eu-Sr stars. The latest objects of the latter group correspond to early F-type.  
Bw star O, B, A, and early F                  B star greater than 0.08 the sun's mass    B star with weak helium lines - i.e., B stars which, if classified according to their colors, would have helium lines too weak for the classification, and which, if classified according to their helium lines, would have colors too blue for their spectral type.  
Epsilon Sagittarii18 24 10.3B9.5III-34 23 5Milky Way  naked eye star 1.85  for many centuries -0.03   asterism   brighter than 5greater than 0.08 the sun's mass   HR 6879 III 
Gamma Corvi12 15 48.3B8IIIpHgMn-17 32 31Milky Way  naked eye star 2.59  for many centuries -0.11   asterism   brighter than 5greater than 0.08 the sun's mass   HR 4662 III 
helium-strong star O, B, A, and early F                  B star greater than 0.08 the sun's mass    B star in which the helium lines are stronger than in normal stars. One distinguishes usually the extreme helium stars (also called hydrogen-deficient stars), in which no trace of hydrogen is seen, and the intermediate helium-rich stars, in which the hydrogen lines are still visible, but weaker than in normal stars. Related to these objects are the hydrogen deficient C stars.  
P-strong star O, B, A, and early F                  B star greater than 0.08 the sun's mass    A small subgroup of B-type stars in which P lines are very strong.  
Regulus B8 V Leo  dwarf     d 26 pc       greater than 0.08 the sun's mass   alpha LeoA visual triple B8 V star.V 
Rigel05 14 32.2B8 Iae-08 12 06Milky Way  naked eye star 0.12  for many centuries -0.03900 light-years  asterism   brighter than 5greater than 0.08 the sun's mass   HR 1713A blue supergiant. It is a multiple star. The seventh brightest star in the night sky.I 
sdB            sd       subdwarf greater than 0.08 the sun's mass    Subdwarf B star with very broad and shallow Balmer lines; fewer lines of the Balmer series are visible than for normal dwarfs.VI 
Spica13 25 11.5B1III-IV+B2V-11 9 41Milky Way4.01452 daysi = 65°naked eye star 0.98e = 0.146 for many centuries -0.2380 pchalf the stars in the solar neighborhood are members of star systems asterism   brighter than 5greater than 0.08 the sun's mass   HR 5056A double-lined spectroscopic binary (B1.5 V, late B). Component A (10.9 Msun) is a beta Cephei star which seems to be near core hydrogen exhaustion.III2
Vela X-1 B0.5 Ib celestial sphere8.96 days single line spectroscopic binary0.2 magnitudes or greater  some difficulty in distinguishing between various kinds    half the stars in the solar neighborhood are members of star systems   X-ray 7of unseen companion 1.7 to 15 Msun, with a probable value of about 2.6 Msun.
  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 decades 3U 0900-40 I2

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