B8V

There is no B8V anchor standard (Garrison94), but 18 Tau and 21 Tau should
be considered anchors.

GarrisonGray94 used HR 9050 = HD 224112 as is low-vsini B8V standard
and 18 Tau as its high-vsini B8Vn standard.

Lesh68, Hiltner69, & Garrison77 used 18 Tau as its B8V standard.

Garrison67 uses 18 Tau & Bet Lib as his B8V standard. 

Cowley69 used 18 Tau and 21 Tau as B8V standards.

Cowley72 used Iot And, Bet Cyg, Zet Peg, 18 Tau, 21 Tau as B8V standards.

Garrison77 uses HD 142315 as their B8V standard.

MK43 lists Bet Per as their B8V standard. 

Skiff08 lists only one B8V standard (HD 23324 = 18 Tau; MK73)

<B-V>(B8V) = -0.094
<U-B>(B8V) = -0.309 (from U-B(B-V) relation)

For 7 primary and secondary standards,
<B-V>(B8V) = -0.103 (+-0.007 sem, +-0.016 stdev; N=7 standards)
<U-B>(B8V) = -0.344 (+-0.029 sem, +-0.064 stdev; N=7 standards)

# No Standard
Keenan85 does not list a B8V standard

# Primary Standards
HD 23432 = 21 Tau = HR 1151 = Asterope = Cl Melotte 22 817
  B8V: JM53,Mendoza56,Osawa59,Palmer68,Cowley69,Cowley72(stan),Abt78,Cannon(B8)
  B8Vn: GarrisonGray94
  *All* Skiff09 types from JM53 to present are B8V or variant. Pleiad. 
  Asterope should be considered an "anchor" B8Vn standard. vsini=205 km/s. 
  Mermillio91: V=5.764, B-V=-0.039, U-B=-0.232
  =>QBV=> (B-V)o=-0.083, (U-B)o=-0.265, E(B-V)= 0.044 

HD 23324 = 18 Tau = HR 1144
  B8V: JM53,Garrison67(stan),Lesh68(stan),Cowley69(stan),Hiltner69(stan),Cowley72(stan),MK73,Garrison77(stan),Houk
  B8Vn: GarrisonGray94(stan)
  M91: V=5.647+-0.005, B-V=-0.071+-0.002, U-B=-0.360+-0.000
  =>QBV=> (B-V)o=-0.114, (U-B)o=-0.388, E(B-V)= 0.043

HD 224112 = HR 9050
  B8V: GarrisonGray94(stan),Jaschek78(Hiltner69),Kennedy83
  Cannon: A
  Skiff08 MK type compendium only lists two types: B8V from both
  Hiltner69 and GarrisonGray94. 
  Mermilliod91: V=6.823, B-V=-0.082, U-B=-0.338
  =>QBV=> (B-V)o=-0.105, (U-B)o=-0.353, E(B-V)= 0.023

# Secondary Standards
HD 19356 = Beta Per = Algol (3 components)
  B8V: MK43,Jaschek64(all),Jaschek78(Slettebak54),GrayAtlas,Gray03
  B8Vs: GarrisonGray94
  B8: Cannon
  B8/9V: Hill75
  HD 19356 was the HD standard for B8 (1918AnHar..91.....C) and
  the B8V standard for MK43. 
  M91: V=2.121+-0.003, B-V=-0.050+-0.001, U-B=-0.370+-0.050
  =>QBV=> (B-V)o=-0.121, (U-B)o=-0.417, E(B-V)=0.071, T=13311

HD 183914 = HR 7418 = bet Cyg B = bet02 Cyg = 6 Cyg B = HIP 95951
  B8V: Jaschek78(JM53),Jaschek64(most),Cowley69(B8Vn),Cowley72(stan),Abt88
  B8Ve: Slettebak63,Slettebak82,Steele99,Levenhagen06
  B8IV/V(e): Slettebak66
  B9: Cannon
  B7V: Osawa59
  B9.5V: Herman59
  BetCyg A is K4II (V=3.0; Albereo)
  Mermilliod91: V=5.121, B-V=-0.095, U-B=-0.312
  => QBV => (B-V)o=-0.095, (U-B)o=-0.311, E(B-V)= 0.000
  Probably a good "B8Ve" standard. 

HD 135742 = bet Lib = Zubeneshamali
  B8V: MK43,Jaschek78(JM53),Garrison67(stan),Jaschek64(all),Molnar72,Cannon(B8)
  B8Vn: Buscombe65
  B8IIIn: Houk99(Garrison)
  vsini=230 km/s. J1517-0922
  Mermilliod91: V=2.614, B-V=-0.109, U-B=-0.365
  => QBV => (B-V)o=-0.107, (U-B)o=-0.361, E(B-V)=-0.002

HD 58715 = bet CMi = MWC 178
  B8V: MK43,Garrison96,Jaschek64(all),Jaschek78(Slettebak54),Cannon(B8)
  B8Ve: Levenhagen06,Slettebak82
  B8IV/Ve shell : Slettebak66
  In Jaschek catalog of Be stars. Good "B8Ve" standard?
  Mermilliod91: V=2.894, B-V=-0.097, U-B=-0.289
  =>QBV=> (B-V)o=-0.087, (U-B)o=-0.283, E(B-V)=-0.010
 
# Weak Standard
HD 87901 = Alf Leo = Regulus = 32 Leo = HR 3982 = GJ 9316A
  B7V: JM53,Osawa59,Jaschek64(major. are B7V),Cowley72(stan),Jaschek78(Murphy69),Garcia89,Garrison96(B7Vn)
  B8IVn: Gray03 
  B8III: Williams36
  B8V: MK43,GarrisonGray94(B8Vnn),Palmer68(B8Vn),Cannon(B8)
  Oscillates between B7V and B8V in the literature. 

HD 222173 = iot And 
  B8V: JM53,Cowley72(stan),Jaschek64(all),Cannon(B8)
  B8IIIs: GarrisonGray94
  GarrisonGray94 switched it to giant, but previouly dwarf since JM53.
  So no longer a good dwarf standard. SB

HD 214923 = zet Peg = 42 Peg = HR 8634
  B8V: JM53,Osawa59,Palmer68,Cowley72(stan),Cannon(B8)
  B8.5III: GarrisonGray94
  B8.5V: Jaschek64(both)
  GarrisonGray94 switched it to giant, but previous dwarf since JM53. 
  So no longer a good dwarf standard. 

HD 142315
  B8V: Jaschek78(Garrison79(stan)),Cannon(B8)
  B8Vnn: GarrisonGray94
  B7V:: Slettebak68
  B9V: Bertiau58,Jaschek64(all),Houk88
  Upper Sco member. 

HD 36865 = Parenago 1491 (J0534-0429)
  B8V: Abt68,Bernacca68,Schild71,Houk99
  B7V: AbtLevato77
  B9: Cannon,Bernacca68
  B8/9: Sharpless52
  Houk99 comments "UNDETECTED VISUAL DOUBLE p=142°, d=0.8arcsec MAGS 7.6, 9.4; vSINi=220" 
  Abt68 calls "B8V" standard, but then "B7V" in Abt77. Binary. Probably not a good standard.