G8V 

G8V dagger is HD 101501 = 61 UMa = HR 4496 (Garrison94)

MK43 lists Xi Boo A and Tau Cet as their G8V standard. 

Morgan65 lists 61 UMa (HD 101501) as the G8V standard, and classified
5 Hyads as G8V: HD 27130, 27282, 28291, 28593, & 28805.

Corbally86 used the Hyad HD 27130 as their G8V standard. 

Skiff08 flags three stars as G8V MK standards, all from Keenan89: HD
10700 (G8V), 101501 (G8V), & 82885 (G8Va).

Gray01/03/06 list 54 nearby G8V stars. Median HIP colors:
<B-V>(G8V) = 0.726 (+-0.004 sem, +-0.027 stdev; N=54)
<V-I>(G8V) = 0.777 (+-0.004 sem, +-0.023 stdev; N=54)


# Dagger Standards
HD 101501 = 61 UMa = HR 4496 = GJ 434 
  G8V: MK43,JM53,Morgan65,Keenan85,Keenan88,Keenan89,Garrison94,Gray03
  all Skiff07 refs after 1940 are G8V

# Other Standards
HD 131156 = Xi Boo A = HR 5544 = GJ 566
  G8V: MK43(stan),JM53,Houk

HD 10700 = Tau Cet
  G8V: MK43(stan),Keenan88,Keenan89,Garrison96,Keenan99
  G8.5V: Gray06

HD 82885 = 11 LMi
  G8Va: Keenan99
  G8V: Abt81
  G8IV: Abt08
  G8IV-V: Roman52

S 3582 = 11:47+38:26 Vmag=6.5
  G8V: MK43

HD 27130 = Cl Melotte 25 22 = HIP 20019
  G8V: Corbally86(stan,Morgan65)
  
  Eclipsing binary

# Variant
HD 69830 = HR 3259 
  G8:V : Keenan00