A9IV

There are no A9IV standards in JM53, MK73, MorganAbt72, Cowley74,
Houk88, Garcia89, GrayGarrison89, nor anchor points in Garrison94.

Gray06 classify two stars as A9IV: HIP 95168 and HIP 102333

GrayGarrison89 classify 17 stars as A9IV or variant. The brightest
"pure" A9IV stars were HD 211336, 197157, 2628.

# Non-Standards
HD 181577 = HR 7340 = HIP 95168 = rho01 Sgr
  A9IV: Gray06,Abt95
  F0III-IV: GrayGarrison89
  F1III: Malaroda75
  F0IV-V: Cowley69
  Quoted types are A9-F1, and III through IV-V. Probably not a good candidate standard.

HD 197157 = HR 7920 = eta Ind (J2044-5155)
  A9IV: Abt95, GrayGarrison89
  A7III/IV: Houk78
  A6-A9: Malaroda73
  A9III-IV: Levato72
  F0: Cannon
  Good agreement on A9. Malaroda says its a spectroscopic variable, however.

HD 211336 

HD 2628

HD 109238
  A9IV: GarrisonGray87
  A9-F2 in the literature