K2III kap Oph is the best southernly accessible K2III standard (J1657+0922; V=3.3), and Garrison94 considers it a K2III anchor standard. MK43 standards: nu Hya - K2III psi UMa - K2III chi UMa - K2III eps Crv - K2III iot Dra - K2III alf Ser - K2III-IV kap Oph - K2III bet Oph - K2III-IV kap Lyr - K2III 109 Her - K2III eps Aql - K2III JM53 standards: alf Ari - K2III iot Dra - K2III kap Oph - K2III bet Oph - K2III xi Dra - K2III Morgan65 standard: alf Ari - K2III Landi Dessy & Keenan66 standard: bet Oph - K2III kap Oph - K2IIIb Abt68 standard: bet Oph - K2III Deutsch69 standards: alf Ari (=HD 12929) - K2III bet Oph (=HD 161096) - K2III alf Ser (=HD 140573) - K2III iot Cet (=HD 1522) - K2III MK73 dagger standard: kap Oph (=HR 6299) - K2III bet Oph (=HR 6603) - K2III xi Dra (=HR 6688) - K2III alf Ari (=HR 617) - K2IIIab eps CrB (=HR 5947) - K2IIIab alf Ser (=HR 5854) - K2III CN 1.5 Houk standards: bet Oph (=HR 6603) - K2III [from MK73] alf Ari (=HR 617) - K2IIIab [from MK73] Turnshek85 standard: eps CrB (=HR 5947) - K2IIIab Garrison94 anchor standards: kap Oph (=HR 6299) - K2III alf Ari (=HR 617) - K2III/K2IIIab GrayAtlas standard: kap Leo - K2III GrayNstars standard: kap Oph - K2III 109 Her - K2IIIab kap Leo - K2III GrayCorbally10 standards: bet Ret - K2III kap Oph - K2III (J-H)(K2III) = 0.576 ; smoothed relation from giants in Skiff compendium w/i 15 deg of NGP, 2MASS photometry AAA flags => adopt (J-H)(K2III) = 0.576 [updated 10/30/2020] (H-Ks)(K2III) = 0.140 ; smoothed relation from giants in Skiff compendium w/i 15 deg of NGP, 2MASS photometry AAA flags => adopt (H-Ks)(K2III) = 0.140 [updated 10/30/2020] (B-V)(K2III) = 0.961 ; HIP 100852 K2III 2006AJ....132..161G (B-V)(K2III) = 1.022 ; HIP 27890 K2III 2006AJ....132..161G (B-V)(K2III) = 1.078 ; HIP 19921 K2III 2006AJ....132..161G (B-V)(K2III) = 1.085 ; HIP 19747 K2III 2006AJ....132..161G (B-V)(K2III) = 1.130 ; HIP 25918 K2III 2006AJ....132..161G (B-V)(K2III) = 1.132 ; HIP 41312 K2III 2006AJ....132..161G (B-V)(K2III) = 1.133 ; HIP 17440 K2III 2006AJ....132..161G (B-V)(K2III) = 1.156 ; median for N=5 K2III stars within 30 pc (B-V)(K2III) = 1.160 ; HIP 83000 K2III 2003AJ....126.2048G (B-V)(K2III) = 1.161 ; HIP 40888 K2IIIb_CN0.5 1989ApJS...71..245K (B-V)(K2III) = 1.163 (+-0.021 sem, +-0.056 68%CL) ;median for N=20 K2III stars w/i 30pc (B-V)(K2III) = 1.166 ; HIP 75458 K2III 2003AJ....126.2048G (B-V)(K2III) = 1.167 ; HIP 77070 K2III 2003AJ....126.2048G (B-V)(K2III) = 1.167 ; mean for N=5 K2III stars in Sloan15 (B-V)(K2III) = 1.168 ; HIP 90139 K2IIIab 1989ApJS...71..245K (B-V)(K2III) = 1.168 ; HIP 86742 K2III 2003AJ....126.2048G (B-V)(K2III) = 1.177 ; HIP 87585 K2III 2003AJ....126.2048G (B-V)(K2III) = 1.190 ; HIP 63613 K2III 2006AJ....132..161G (B-V)(K2III) = 1.192 ; HIP 87261 K2III 2006AJ....132..161G (B-V)(K2III) = 1.222 ; HIP 48455 K2IIIb_CN1_Ca1 1989ApJS...71..245K => adopt (B-V)(K2III) = 1.16 [updated 10/30/2020] (V-Ic)(K2III) = 1.11 ; xHIP K2III d<75pc red clump (N=37) => adopt (V-Ic)(K2III) = 1.11 [updated 10/30/2020] Teff(K2III) = 4590 K ; median for N=40 K2III Gray03/06 stars w/i 40pc (see below) Teff(K2III) = 4620 K ; median for N=8 K2III stars within 30 pc => adopt Teff(K2III) = 4600K [updated 10/30/2020] logL(K2III) = 1.63 ; median for N=8 K2III stars within 30 pc Mv(K2III) = -0.02 ; sec. stan. eps CrB = HR 5947 = HIP 78159 (K2IIIab) Mv(K2III) = 0.26 ; HIP 87261 K2III 2006AJ....132..161G Mv(K2III) = 0.76 ; sec. stan. bet Oph = HR 6603 = HIP 86742 K2III 2003AJ....126.2048G Mv(K2III) = 0.83 ; HIP 75458 K2III 2003AJ....126.2048G Mv(K2III) = 0.85 ; HIP 77070 K2III 2003AJ....126.2048G Mv(K2III) = 0.95 ; pri. stan. kap Oph = HR 6299 = HIP 83000 K2III 2003AJ....126.2048G Mv(K2III) = 0.95 ; HIP 40888 K2IIIb_CN0.5 1989ApJS...71..245K Mv(K2III) = 0.98 ; HIP 48455 K2IIIb_CN1_Ca1 1989ApJS...71..245K Mv(K2III) = 1.04 ; sec. stan. xi Dra = HR 6688 = HIP 87585 K2III 2003AJ....126.2048G Mv(K2III) = 1.04 ; HIP 90139 K2IIIab 1989ApJS...71..245K Mv(K2III) = 1.11 ; HIP 19747 K2III 2006AJ....132..161G Mv(K2III) = 1.17 ; median for N=8 K2III stars within 30 pc Mv(K2III) = 1.18 ; HIP 41312 K2III 2006AJ....132..161G Mv(K2III) = 1.22 ; xHIP K2III d<75pc red clump Mv(K2III) = 1.28 (+-0.45 sem, +-1.78 stdev) ; N=20 K2III Gray03/06 stars w/i 40pc Mv(K2III) = 1.38 ; HIP 63613 K2III 2006AJ....132..161G Mv(K2III) = 1.41 ; HIP 17440 K2III 2006AJ....132..161G Mv(K2III) = 2.56 ; HIP 27890 K2III 2006AJ....132..161G Mv(K2III) = 2.70 ; HIP 25918 K2III 2006AJ....132..161G Mv(K2III) = 3.14 ; HIP 19921 K2III 2006AJ....132..161G Mv(K2III) = 3.38 ; HIP 100852 K2III 2006AJ....132..161G => adopt Mv(K2III) = 1.2 [updated 10/30/2020] M_I(K2III) = 0.17 ; xHIP K2III d<75pc red clump (N=37) M_I(K2III) = 0.11 ; Mv=1.22, V-Ic=1.11 M_I(K2III) = 0.07 ; sec. stan. xi Dra = HR 6688 M_I(K2III) = -0.10 ; linear fit to red giant clump xHIP d<75pc for V-Ic=1.11 M_I(K2III) = -0.24 ; pri. stan. kap Oph = HR 6299 M_I(K2III) = -0.50 ; sec. stan. bet Oph = HR 6603 M_I(K2III) = -1.05 ; sec. stan. eps CrB = HR 5947 # Primary standards kap Oph = HR 6299 = HD 153210 (V=3.20) K2III: Adams35,MK43,JM53,MK73(dagger),Keenan89,Garrison94,GrayNstars,Gray03,GrayCorbally10 G9III: Moore50 K0III: Lindblad22 xHIP: V-Ic=1.10+-0.02, Mv=0.95, M_I=-0.24. # Secondary standards xi Dra = HR 6688 = HD 163588 (V=3.74) K2III: JM53,MK73(dagger) xHIP: V-Ic=1.11+-0.03, Mv=1.04, M_I=0.07 bet Oph = HR 6603 = HD 161096 = HIP 86742 (V=2.77) K2III: JM53,Abt68(stan),Deutsch69(stan),MK73(dagger),Houk(stan) xHIP: V-Ic=1.10+-0.02, Mv=0.76, M_I=-0.50 109 Her K2III: GrayNstars kap Leo K2III: GrayNstars iot Dra K2III: JM53 iot Cet K2III: Deutsch69(stan) eps CrB = HR 5947 = HD 143107 = HIP 78159 (V=4.14) *K2IIIab: MK73(dagger),Turnshek85(stan) xHIP: V-I=1.17+-0.03, Mv=-0.02, M_I=-1.05. bet Ret K2III: GrayCorbally10 # Variant alf Ari = HR 617 = HD 12929 (V=2.0) *K2-IIIb Ca-1: Keenan89, Keenan99 K2IIIab: MK73(dagger),Houk(stan) K2III: Roman52,JM53,Morgan65(stan),Deutsch69(stan),Garrison94 K1IIIb: Adams35,Gray03 G9: Bidelman85 Adopt "K2-IIIb Ca-1" from Keenan99. Garrison94's anchor table shows K2III and K2IIIab classifications. alf Ser = HR 5854 = HD 140573 (V=2.64) *K2III CN 1.5: MK73(dagger) K2III: Deutsch69(stan) Adopt "K2III CN 1.5" from MK73. # K2III stars from Gray03/06 w/i 40pc (N=20) B-V HIP# 0.961 HIP_100852_ 1.021 HIP_27890_ 1.078 HIP_19921_ 1.085 HIP_19747_ 1.130 HIP_25918_ 1.132 HIP_41312_ 1.133 HIP_17440_ 1.160 HIP_83000_ 1.166 HIP_75458_ 1.167 HIP_77070_ 1.168 HIP_86742_ 1.177 HIP_87585_ 1.185 HIP_63467_ 1.190 HIP_63613_ 1.192 HIP_87261_ 1.354 HIP_1692_ => median B-V(K2III) = 1.163 (+-0.021 sem, +-0.056 68%CL) Mv HIP# 0.258175 HIP_87261_ 0.762142 HIP_86742_ 0.831302 HIP_75458_ 0.852193 HIP_77070_ 0.950907 HIP_83000_ 1.04049 HIP_87585_ 1.11353 HIP_19747_ 1.17936 HIP_41312_ 1.38426 HIP_63613_ 1.46458 HIP_17440_ 1.72928 HIP_1692_ 2.55462 HIP_27890_ 2.69827 HIP_25918_ 3.13509 HIP_19921_ 3.37986 HIP_100852_ 7.67262 HIP_63467_ => median Mv(K2III) = 1.282 (+-0.45 sem, +-1.78 stdev) For 73 Teff estimates for N=20 K2III Gray03/06 stars w/i 40 pc => median Teff(K2III) = 4588 K (+-15K sem, +-143K stdev)