F3IV

MorganAbt72 standard: HR 8071 (=HD 200723) - F3IV
		      HR 2811 (=HD 57749) - F3IV
Cowley76 standard:    HR 8071 - F3IV
GrayNstars standard:  HR 1566 - F3IV

(B-V)(F3IV) = 0.371(+-0.010 sem,+-0.037 stdev) ; SIMBAD median F3IV d<75pc,V<6.5(N=9)
(B-V)(F3IV) = 0.376 ; ter. stan. HD 200723 = HR 8071 
(B-V)(F3IV) = 0.391 ; exemplar HD 153229 = HR 6302
=> adopt (B-V)(F3IV) = 0.37 [updated 2/3/2022]

Mv(F3IV) = 1.20 ; ter. stan. HD 200723 = HR 8071 
Mv(F3IV) = 1.9  ; GrayCorbally09
Mv(F3IV) = 2.50(+-0.12 sem,+-0.38 stdev) ; SIMBAD median F3IV d<75pc,V<6.5(N=9)
Mv(F3IV) = 2.97 ; exemplar HD 153229 = HR 6302 (0.1 mag above MS!)
[all the F3IVs in SIMBAD at d<75pc have 2.02 < Mv < 2.88]

# No standard

There are no F3IV standards in JM53, MK73, Cowley74,Houk88, Garcia89, nor
anchor points in Garrison94.

# Tertiary Standard

HD 200723 = HR 8071 = HIP 103963
  F0V: Adams35
  F2: Cannon
  F2III: Wilson60,Gray01
  F2IV: 1969RGOB..155...21J
 *F3IV: Morgan72(stan.),Cowley76(standard),Grenier99
  F5III: Harlan74

  Called tertiary standard since did not appear as a standard in the
  main compilations, and even Morgan himself did not include in
  e.g. JM53, MK73, MK78, and Gray and Garrison did not repeat as
  standards later.  Gray disagrees with Morgan on temp and lum
  subtype.  V=6.34(HIP), B-V=0.390+-0.006(HIP), V-Ic=0.46+-0.01(HIP).
  E(B-V)=0.0069+-0.0024(Stassun19/TICv8), E(B-V)=0.014(Kervella19) =>
  Av ~ 0.04.  (B-V)o = 0.390 - 0.014 = 0.376.  plx=9.5265+-0.0171mas
  (GaiaEDR3) => Mv=1.20, ~1.80 mag above MS.

# Deprecated Standards

HD 31236 = HR 1566 = Cl Melotte 25 126 (J0454+1929)
  F3IV: Cowley76
  F0IV-V: GrayGarrison89
  F1V(n): Gray01 
  F1V: Abt95
  F0: Cannon
  
  Emailed R. Gray regarding this star -- Nstars webpage lists it 
  as F3IV, but it is F0 or F1 in most other papers. 
  
HR 2811 = HD 57749 
  F3IV: Jaschek78(Morgan72),Adams35
  F0: Cannon
  F2III: Houk99,Wilson52

# Exemplars

HD 153229 = HR 6302 = HIP 83090 
 *F3IV: Malaroda75,GrayGarrison89
  F3V: Cowley76

  V=6.48(HIP), B-V=0.391+-0.005(HIP), V-Ic=0.46+-0.01(HIP).
  plx=19.8570+-0.0250mas(GaiaEDR3) => Mv=2.97 => 0.12 mag above MS.

# Other Stars

HD 96202 = HR 4314
  F1: 1932PLicO..18....1M	
 *F3IV: Malaroda75,Abt81
  F3IV/V: Houk8
  F4IV: 1953AnHar.119....1H
  F4V: Adams35