K5IV

Keenan89 lists HD 12524 as a K5IV standard, the latest/coolest
subgiant standard in his list. However, its absolute magnitude
(Mv ~ -0.2) places it squarely among the giants, 10 mags above the
main sequence. 

Keenan89 standard: HD 12524 (chi Phe) - K5IV
Keenan99 standard: HD 12524 (chi Phe) - K5IV 

There is one K5IV star among the Hipparcos stars with d < 75 pc, but
its Mv is ~7.4, i.e. within 0.5 mag of the main sequence.

(B-V)(K5IV) = 1.490 ; deprecated standard chi Phe = HD 12524 = HR 602

Mv(K5IV) = -0.25 ; deprecated standard chi Phe = HD 12524 = HR 602 

# Deprecated Standard

chi Phe = HR 602 = HD 12524 = HIP 9459
 *K5IV: Keenan89,Keenan99
  K5III: 1937AnHar.105...45H,Houk78,Garcia89(K5III)
  M0: 1932PLicO..18....1M
  
  plx = 8.69+-0.29 mas(HIP2), plx=8.3941+-0.1552mas(GaiaDR2). B-V =
  1.471+-0.047 (HIP), B-V = 1.49 (Johnson66), B-V = 1.485+-0.006
  (Cousins71), B-V=1.490+-0.000 (Mermilliod91), V-I = 1.61 (HIP), U-B
  = 1.82 (Johnson66), U-B = 1.18 (Cousins71), U-B=1.817+-0.007
  (Mermilliod91), V = 5.14 (Johnson66,Cousins71),
  V=5.136+-0.005(Mermilliod91), K_J = 1.52 (Morel78), J_J = 2.52
  (Morel78). Cousins71 photometric standard star. 2MASS photometry is
  poor (+-0.3 mag errors). Lafrasse10 lists Teff = 4050 K, logg=1.7,
  but they are "adopted from spectral type".  This
  is 10.0 mags(!) above the MS for B-V = 1.485, so it is clearly a
  *giant*, not a subgiant. I would adopt Houk's "K5III" and not use it
  as a standard considering that there are already other good K5III
  standards. E(B-V)=0.002(Kervella19). Mv=-0.25(Mermilliod91,GaiaDR2).