G4V

There are no G4V dagger types

Houk does not treat G4 as a full type

Skiff08 flags two stars as G4V MK standards, both from Keenan89: HD
117176 (G4Va) & HD 214850 (G4V).

Morgan65 did not classify any Hyads as G4V.

Gray01/03/06 list 16 nearby G4V stars. Median HIP colors:
<B-V>(G4V) = 0.684 (+-0.006 sem, +-0.022 stdev; N=16)
<V-I>(G4V) = 0.740 (+-0.005 sem, +-0.018 stdev; N=16)


# No standards
JM53,Morgan65,Houk,Keenan85,Corbally86,Keenan99 do not list any G4V standards

# Weak Standards
HD 117176 = 70 Vir = HR 5072: HIP[B-V] = 0.714+-0.007
  G4V: Keenan89,Keenan88
  G5V: Gray01,JM53
  G5IV-V: MK43
  Mamajek02 suggests "IV-V" may be a more appropriate luminosity
  class.
  The majority of Skiff07 refs show G5V, Keenan89 is only G4V
  The B-V=0.714 is redder than mean G4V (0.659)
  This may not be an ideal standard...

HD 214850AB = HR 8631: B-V[HIP]=0.723+-0.004  
  G4V: Keenan89,Keenan88,Abt81,Garcia89
  G5V: Christy69
  G3V: Adams35
  Its a SB2 20yr orbit: G3V+G8V, hence the red B-V
  The B-V=0.723 is redder than mean G4V (0.659)

Mean G4V B-V = 0.659