K1III 12 Aql is the best southernly accessible K1III standard. (J1901-0544; V=4.0) Houk standard: 1 Peg (=HR 8173) - K1III [from MK73] Houk sec. standard: tet Psc (=HR 8916 = HD 220954) - K1III [from Roman52] Keenan89 standards: 12 Aql - K1III 6 CMi - K1III sig Hya - K1III psi UMa - K1III gam Com - K1III Fe0.5 gam Cep - K1III-IV CN1 37 Lib - K1III-IV GrayNstars standard: 90 Her - K1IIIb GrayCorbally10 standard: 90 Her - K1IIIb (J-H)(K1III) = 0.551 ; smoothed relation from giants in Skiff compendium w/i 15 deg of NGP, 2MASS photometry AAA flags => adopt (J-H)(K1III) = 0.551 [updated 10/30/2020] (H-Ks)(K1III) = 0.130 ; smoothed relation from giants in Skiff compendium w/i 15 deg of NGP, 2MASS photometry AAA flags => adopt (H-Ks)(K1III) = 0.130 [updated 10/30/2020] Teff(K1III) = 4489 K ; HIP 82396/HD 151680 Blackwell98 Teff(K1III) = 4545 K ; HIP 27628/HD 39425 Gray06 Teff(K1III) = 4690 K ; median Teff for Gray03/06 K1III stars w/i 40 pc (see below) Teff(K1III) = 4690 K ; prim. stan. 12 Aql (see below) Teff(K1III) = 4778 K ; HIP 90496/HD 169916 Alves15 => adopt Teff(K1III) = 4700 K [updated 10/30/2020] (B-V)(K1III) = 0.912 ; HIP 56145 K1III 1990A&AS...85.1069S (B-V)(K1III) = 0.960 ; HIP 113638 K1III_Fe-1.2_CN-0.5 2006AJ....132..161G (B-V)(K1III) = 0.981 ; HIP 88635 K1III 2006AJ....132..161G (B-V)(K1III) = 1.008 ; HIP 107089 K1III 2006AJ....132..161G (B-V)(K1III) = 1.011 ; HIP 64725 K1III 2006AJ....132..161G (B-V)(K1III) = 1.031 ; HIP 116727 K1III 2003AJ....126.2048G (B-V)(K1III) = 1.037 ; HIP 31592 K1III 2006AJ....132..161G (B-V)(K1III) = 1.060 ; median for N=12 K1III stars within 40 pc (Gray03/06) (B-V)(K1III) = 1.081 ; mean for N=6 K1III stars in Sloan15 (B-V)(K1III) = 1.082 ; HIP 21594 K1III 2006AJ....132..161G (B-V)(K1III) = 1.108 ; HIP 105502 K1III 1989ApJS...71..245K (B-V)(K1III) = 1.118 ; HIP 37629 K1IIIe 1989ApJS...71..245K (B-V)(K1III) = 1.144 ; HIP 54539 K1III 1989ApJS...71..245K (B-V)(K1III) = 1.144 ; HIP 82396 K1III 2006AJ....132..161G (B-V)(K1III) = 1.146 ; HIP 27628 K1III_CN+1 2006AJ....132..161G (B-V)(K1III) = 1.151 ; HIP 9884 K1IIIb 2003AJ....126.2048G (B-V)(K1III) = 1.161 ; HIP 5364 K1III 2006AJ....132..161G (B-V)(K1III) = 1.169 ; HIP 93864 K1III 2006AJ....132..161G => adopt (B-V)(K1III) = 1.07 [updated 10/30/2020] (V-Ic)(K1III) = 1.06 ; median xHIP K1III d<75pc in red clump => adopt (V-Ic)(K1III) = 1.06 [updated 10/30/2020] Mv(K1III) = -0.23 ; HIP 54539 K1III 1989ApJS...71..245K Mv(K1III) = 0.46 ; HIP 93864 K1III 2006AJ....132..161G Mv(K1III) = 0.49 ; HIP 9884 K1IIIb 2003AJ....126.2048G Mv(K1III) = 0.56 ; HIP 5364 K1III 2006AJ....132..161G Mv(K1III) = 0.62 ; HIP 88635 K1III 2006AJ....132..161G Mv(K1III) = 0.68 ; HIP 105502 K1III 1989ApJS...71..245K Mv(K1III) = 0.84 ; eps Sco = HIP 82396 K1III 2006AJ....132..161G Mv(K1III) = 0.87 ; xHIP K1III d<75pc red clump (N=46) Mv(K1III) = 0.92 ; lam Sgr (K1IIIb) Mv(K1III) = 0.98 ; bet Col = HIP 27628 K1III_CN+1 2006AJ....132..161G Mv(K1III) = 1.10 ; median for N=12 K1III stars within 40 pc Mv(K1III) = 1.22 ; HIP 21594 K1III 2006AJ....132..161G Mv(K1III) = 1.31 ; HIP 37629 K1IIIe 1989ApJS...71..245K Mv(K1III) = 1.49 ; HIP 113638 K1III_Fe-1.2_CN-0.5 2006AJ....132..161G Mv(K1III) = 2.10 ; nu Oct = HIP 107089 K1III 2006AJ....132..161G Mv(K1III) = 2.28 ; HIP 64725 K1III 2006AJ....132..161G Mv(K1III) = 2.46 ; HIP 116727 K1III 2003AJ....126.2048G Mv(K1III) = 2.47 ; HIP 31592 K1III 2006AJ....132..161G Mv(K1III) = 3.47 ; HIP 56145 K1III 1990A&AS...85.1069S => adopt Mv(K1III) = 1.0 [updated 10/30/2020; M_I=-0.06, V-I=1.06] M_I(K1III) = -0.063 ; xHIP K1III d<75pc in red clump (N=46) => adopt M_I(K1III) = -0.06 [updated 10/30/2020; Mv=1.0, V-I=1.06] # No standards MK43 and Deutsch69 do not list any K1III standards. # Primary standard 12 Aql = HR 7193 = HD 176678 (J1901-0544; V=4.0) *K1III: Adams35,Roman52,Roman55,Keenan89 Teffs: 4608K(Reffert15#1), 4690K(Hekker07), 4692K(Reffert15#2). [Fe/H]=0.02(Hekker07), logg=2.95(Hekker07). # Secondary standard 1 Peg = HR 8173 = HD 203504 (J2122+1948; V=4.1) *K1III: Jaschek64(most), MK73(non-standard),Houk(stan),Keenan89(non-standard) K0.5IIIb: Abt85 K0: Cannon Brighter of 36" pair. Only considered standard by Houk, however consistent at "K1III" between MK73 and Keenan89. sig Hya = HD 73471 (J0838+0320; V=4.4) *K1III: Keenan89,Keenan99 K2III: Roman52 K3III: Adams35 Would prefer to see more published types and more agreement on temperature type over the years, but at least Keenan kept consistent at "K1III" from 1989 onward. # Weak standards 90 Her = HD 163217 *K1+IIIb CN-1: Keenan89 K1IIIb: GrayNstars,GrayCorbally10 K3III CN+1: Abt85 K3III: Roman52 K4III: Wilson50 K1III: Adams35 K2II-III: Stephenson69 Adopt "K1+IIIb CN-1" from Keenan89. 1.5" binary. Little agreement on temperature type. 6 CMi = HD 59294 (J0729+1200: V=4.6) *K1III: Keenan89 K2III: Roman52 K3III: Adams35 Would prefer to see more published types and more agreement on temperature type over the years. psi UMa = HR 4335 = HD 96833 (J1109+4429; V=3.0) *K1III: Adams35,Roman52(lines weak),Hossack54,Keenan89 K1II: Moore50 K2III: MK43 Keenan switched type from "K2III" in 1943 to "K1III" in 1989. # Other Stars lam Sgr = HD 169916 = HR 6913 = HIP 90496 K1+IIIb: Keenan80 *K1IIIb: Keenan89 K0IV: Gray06 # Nearby K1III stars from Gray03 & Gray06 B-V HIP# 0.960 HIP_113638_ 0.981 HIP_88635_ 1.008 HIP_107089_ 1.011 HIP_64725_ 1.031 HIP_116727_ 1.037 HIP_31592_ 1.082 HIP_21594_ 1.144 HIP_82396_ 1.146 HIP_27628_ 1.151 HIP_9884_ 1.161 HIP_5364_ 1.169 HIP_93864_ => median (B-V)(K1III) = 1.060 (+-0.022 sem, +-0.083 68%CL) Mv HIP# 0.462294 HIP_93864_ 0.485656 HIP_9884_ 0.561429 HIP_5364_ 0.616216 HIP_88635_ 0.835926 HIP_82396_ 0.984939 HIP_27628_ 1.22305 HIP_21594_ 1.49271 HIP_113638_ 2.09833 HIP_107089_ 2.28403 HIP_64725_ 2.46354 HIP_116727_ 2.47204 HIP_31592_ => median Mv(K1III) = 1.104 (+-0.231 sem, +-0.937 68%CL) Median Teffs (rounded) from PASTEL for K1III Gray03/06 stars w/i 40pc HIP_82396_ 5600 HIP_27628_ 4510 HIP_9884_ 4550 HIP_5364_ 4600 HIP_21594_ 4620 HIP_93864_ 4690 HIP_31592_ 4770 HIP_88635_ 4770 HIP_116727_ 4820 HIP_64725_ 4890 HIP_76362_ 5160 => median Teff(K1III) = 4690K For N=12 Gray03/06 K1III stars w/i 40pc, N=66 Teff estimates: => median Teff(K1III) = 4704K (+-36K sem, +-205K stdev)