G0V

HD109358 is the G0V dagger type (Garrison94)

MK43 lists Xi UMa as the G0V standard. Unfortunately it is a 1" binary, which Keenan89
split into a F8.5:V + G2V binary. Is this the reason the differences in the late-F/early-G
classifications among later authors?

Morgan65 lists Bet CVn (HD 109358) as its G0V standard, and classified two
Hyads as G0V: HD 27406 & 27691.

Morgan71 and Garrison72 list Bet Com (HD 114710) as its G0V standard

MorganAbt73 and Cowley76 list Bet Com & Eta Cas A as their G0V standards.

Corbally86 used the Hyad HD 27406 (vB 31) as their G0V standard. 

HD 2151 (Bet Hyi) was a G0 standard for the HD catalog (1918AnHar..91.....C)

Mean color of Hipparcos G0V   stars w/i 75 pc is 0.588
Mean color of Hipparcos G0IV  stars w/i 75 pc is 0.586 (N=20)
Mean color of Hipparcos G0III stars w/i 75 pc is 0.591 (N=6)

Gray01/03/06 list 81 nearby G0V stars. Their median HIP colors are:
<B-V>(G0V) = 0.599 (+-0.001 sem, +-0.018 stdev; N=81)
<V-I>(G0V) = 0.669 (+-0.001 sem, +-0.024 stdev; N=81)

# No standard
Houk does not list a G0V standard

# Dagger standards
HD 109358 = bet CVn = HR 4785 = GJ 475
  G0V: MKK43,JM53,Morgan65,Garrison72(stan),MK73,Jaschek78,Keenan85,Keenan88,Garrison94,Gray01,Gray03,GrayNstars
  G1V: MorganAbt73
  B-V(HIP)=0.588+-0.009, whereas B-V(G0V,HIP)=0.585 so its B-V color
  is very representative for its color

# Other standards
HD 14802 = kap For = HR 695 = GJ 97
  G0V: Gray89,Keenan89,Keenan99
  G1V: Jaschek78(Buscombe62),Torres06
  G2V: Houk88
  F5: Cannon
  Torres06 says SB?

HD 39587 = chi01 Ori = HR 2047
  G0V: MK43,Roman52,Slettebak55,Keenan89,Keenan99
  G0IV-V: Gray03(G band slightly weak)
  G0-V Ca0.5: Keenan88
  G1V: Cowley76,Levato78
  F8V: Moore50
  "Chi02 Ori" is a V=4.6 B2 supergiant!
  Keenan89 and Keenan88 differ slightly(?)

HD 95128 = 47 UMa = HR 4277
  G0V: MK43,Keenan88

# Weak standards
HD 4614A = eta Cas A = HR 219A = HIP 3821 = GJ 34A
  F9V: Keenan88,Keenan89,Hoffleit91,Keenan99,Gray01,GrayNstars,Abt08
  G0V: MK43,JM53,MorganAbt73,Cowley76(stan),MK78,Abt81,Keenan85,Barry70(G0Vb),Moore50,GrayAtlas,Garrison96
  B-V(HIP)=0.587, Vmag=3.46, Mv=4.59, dMv=+0.20, par=168.0+-0.4 mas
  Spectroscopic binary; not in Houk
  Probably inappropriate as standard as G0V only ~1940s-80s
  Gray calls it G0V in his atlas, but F9V in his 2001 catalog
  It appears G0V is where "MK" had an "M" version and a "K" version?

HD 141004 = lam Ser = HR 5868 = GJ 598
  G0V : MK73(non-standard)
  G0V- : Keenan88
  G2V: MK43

HD 114710 = bet Com = HR 4983 = GJ 502
  G0V : MK43,JM53,Morgan71,MK73,Cowley76(stan),GrayAtlas
  G2V : Houk(changed,but she doesn't recommend use as a standard)
  Appears to be a common G0V standard among Morgan,Keenan,& Gray, but not Houk

del Tri
  G0V: MK43

iot Per
  G0V: MK43

HD 27406 = Cl Melotte 25 31 = V986 Tau = HIP 20237
  G0V: Corbally86(stan,Morgan65)