K5III I've only included "pure" K5III standards from Keenan89 thus far. The best southern K5III standard is N Vel (=HD 82668) MK43 standards: alf Tau - K5III bet Cnc - K5III bet UMi - K5III gam Dra - K5III JM53 standards: alf Tau - K5III gam Dra - K5III Keenan63 standards: HR 8424 - K5+III gam Sge - K5+III nu Boo - K5+III Landi Dessy & Keenan66 standard: alf Tau - K5III Abt68 standard: gam Dra - K5III Deutsch69 standards: alf Tau (=HD 29139) - K5III alf Lyn (=HD 80493) - K5+III MK73 dagger standard: alf Tau (=HR 1457) - K5III N Vel (=HR 3803) - K5III gam Dra (=HR 6705) - K5III Houk standards: alf Tau (=HR 1457) - K5III gam Dra (=HR 6705) - K5III Houk sec. standard: HR 7633 (=HD 189276) - K5III Turnshek85 standard: alf Tau (=HD29139) - K5III Keenan89 standard: N Vel (=HD 82668) - K5III nu2 CrB (=HD 147767) - K5III gam Dra (=HD 164058) - K5III Kirkpatrick91 standards: gam Dra (=HD 164058) - K5III GrayNstars standards: gam Dra (=HD 164058) - K5III alf Tau (=HR 1457) - K5III GrayCorbally10 standard: gam Dra (=HD 164058) - K5III (J-H)(K5III) = 0.652 (+-0.030 sem, +-0.105 stdev) ; N=21 K5III from Skiff compendium w/i 15deg of NGP, 2MASS photometry AAA flags => adopt (J-H)(K5III) = 0.652 [updated 10/30/2020] (H-Ks)(K5III) = 0.173 (+-0.014 sem, +-0.055 stdev) ; N=21 K5III from Skiff compendium w/i 15deg of NGP, 2MASS photometry AAA flags (H-Ks)(K5III) = 0.170 ; smoothed relation from giants in Skiff compendium w/i 15 deg of NGP, 2MASS photometry AAA flags => adopt (H-Ks)(K5III) = 0.170 [updated 10/30/2020] (B-V)(K5III) = 1.498 ; mean for N=5 K5III stars in Sloan15 (B-V)(K5III) = 1.521 ; HIP 87833 K5III 1989ApJS...71..245K (B-V)(K5III) = 1.538 ; HIP 21421 K5III 2006AJ....132..161G => adopt (B-V)(K5III) = 1.52 [updated 10/30/2020] Teff(K5III) = 3873 K ; sec. stan. alf Tau (K5+III) Teff(K5III) = 3930 K ; pri. stan. gam Dra (K5III) Teff(K5III) = 4046: K ; pri. stan. N Vel (K5III) => adopt Teff(K5III) = 3930K [updated 10/30/2020] logg(K5III) = 1.93 ; pri. stan. N Vel (see below) logg(K5III) = 1.57 ; pri. stan. gam Dra (see below) logg(K5III) = 1.34 ; sec. stan. alf Tau (K5+III; see below) => adopt logg(K5III) = 1.6 [updated 10/30/2020] Mv(K5+III) = -0.69 ; sec. stan. alf Tau = HIP 21421 (K5+III; see below) Mv(K5III) = -1.14 ; pri. stan. gam Dra = HIP 87833 (see below) Mv(K5III) = -1.19 ; pri. stan. N Vel (see below) => adopt Mv(K5III) = -1.14 mag [updated 10/30/2020] # No standard Morgan65 does not list a K5III standard. # Primary Standards N Vel = HR 3803 = HD 82668 (J0931-5702; V=3.13) *K5III: LandiDessyKeenan66,MK73(dagger),Keenan89(stan) K4/5III: Houk75(GarrisonHagen,unpub.) HIP2 plx = 13.65+-0.10 mas (d = 73.3+-0.5 pc), so most likely unreddened. V = 3.135 +- 0.014 (Mermilliod91), B-V = 1.550+-0.000 (Mermilliod91), U-B = 1.873 +- 0.005 (Mermilliod91), K = 0.40 (Price68). The Mermilliod91 V mag and HIP2 parallax are consistent with absolute magnitude Mv = -1.19+-0.02 mag. Price10 lists near-IR photometry from DIRBE of: F1.25um = 1191+-69 Jy, F2.2um = 1007+-39 Jy, F3.5um = 501+-28 Jy, F4.9um = 223+-15 Jy. 2MASS photometry is poor (+-0.3 mag errors each band). Taking the Gezari/Price68 Kmag, V-K(Johnson) = 2.735 (not all that different than the (K5V) which is ~2.835). The diBenedetto98 calibration predicts Teff = 4424 K. In GCVS variable star catalog with max V=3.12, min V=3.15, but noted "CST:" = "Nonvariable stars, formerly suspected to be variable and hastily designated. Further observations have not confirmed their variability." - so probably approximately constant. Shaya11 claims the star may have a comoving ompanion wih HIP 47479 (A3IV, V=5.3) separated by 2pc. Richichi02 lists limb-darkening corrected diameter of 7.13+-0.08 mas. Teff = 4046 K (Borde02, logg=1.93). gam Dra = HR 6705 = HD 164058 = Etamin (J1756+5129; V=2.23) *K5III: JM53,Abt68(stan),MK73(dagger),Houk(stan),Keenan89(stan),GrayCorbally10 HIP2 parallax = 21.14+-0.10 mas => D = 47.3 +- 0.2 pc. Vmag = 2.233+-0.011 (Mermilliod91). The HIP2 parallax and Mermiiliod91 parallax are consistent with Mv = -1.14+-0.02 mag. Kidger03 lists J = -0.430+-0.003, H = -1.150+-0.004, K = -1.310+-0.005 (where Vega has mag = 0.00). Median Teff for 7 estimates in Soubiran11 PASTEL catalog from 1990-2005 is 3930K. Older estimates are higher (T=4271 K; Lambert81, T=3969K; Oinas77). T = 3972K (Katz11), T=3955 K (Houdashelt00), T=4221K (Biazzo07). logg estimates: 1.73 (Prugniel07), 1.55 (Katz11), 1.20 (Houdashelt11), 1.55 (Mallik98), 1.55 (McWilliam90), 1.60 (Oinas77), 1.55 (Lambert81) => = 1.57. [Fe/H] =0.12 (Prugniel07). Mv = -1.069 (Katz11). # Depreciated Standards alf Tau = HR 1457 = HD 29139 (J0435+1630; V=0.86) *K5.5III: Keenan94 K5+III: Keenan89(stan) K5III: JM53,Deutsch69(stan),MK73(dagger),Houk(stan),Turnshek85(stan) Keenan94(1994ASPC...60...15K): "It can be understood easily, howver, that as we narrow the bins into which the stars are sorted, any one star may find itself outside the bounds of its original type. This happened to alf Tau, which was originally defined as K5 III, thought it always seemed just a shade later than the average K5 giant. With the introduction of bins of half-type or quarter-type width, it now falls into type K5.5 III." Vmag = 0.867+-0.017 (Mermilliod91), B-V = 1.538+-0.008 (Mermilliod91), U-B=1.900+-0.022 (Mermilliod91). HIP2 parallax = 48.94+-0.77 mas => D = 20.4+-0.3 pc. The Mermilliod91 Vmag and HIP2 parallax are consistent with Mv = -0.69 +- 0.04 mag. 2MASS photometry is blasted (+-0.2 mag errors). Teff = 3880 K (Prugniel07#1), 3886 K (Prugniel07#2), 3800 K (Fernandez-Villacanas90), 3850 K (Mallik98), 3866 K (Alonso99), 3875 K (Luck95), 3883 K (Ramirez05), 3891 K (Melendez08), 3910 K (McWilliam90), 4100 K (Hekker07) => median Teff =3878 K. logg estimate: 1.10 (Prugniel#1), 1.80 (Prugniel#2), 1.80 (Fernandez-Villacanas90), 0.55 (Mallik98), 0.55 (Luck95), 1.20 (Melendez08), 1.59 (McWilliam90), 1.70 (Hekker07) => = 1.34 +- 0.24 dex. [Fe/H] estimates: -0.13 (Prugniel#1), 0.05 (Prugniel#2). alf Lyn = HD 80493 K5+III: Deutsch69(stan) HR 7633 = HD 189276 K5II/III: Houk(sec. stan. from Roman52) K5II-III: Roman55 K5III: Adams35 K5: Lee47 K4.5IIIa: Keenan89(non-stan)