L4.5V Kirkpatrick09(GrayCorbally): 2MASS J22244381-0158521 - L4.5 (primary optical standard) V-R(L4.5V) = 3.53 ; GJ1001BC (see below) V-R(L4.5V) = 3.56 ; 2M1224 (see below) V-R(L4.5V) = 3.64 ; 2M1126 (see below) => adopt V-R(L4.5V) = 3.56 V-I(L4.5V) = 6.01 ; GJ1001BC (see below) V-I(L4.5V) = 6.05 ; 2M1224 (see below) V-I(L4.5V) = 6.24 ; 2M1126 (see below) => adopt V-I(L4.5V) = 6.05 (J-H)(L4.5V) = 1.010 ; (+-0.13 rms); SIMBAD d<30pc trend for Ldwarfs => adopt (J-H)(L4.5V) = 1.01 [updated 8/6/2020] (H-Ks)(L4.5V)= 0.641 (+-0.09 rms); trend SIMBAD d<30pc L dwarfs => adopt (H-Ks)(L4.5V) = 0.641 [updated 8/6/2020] V-Ks(L4.5V) = 11.80 ; 2M2224 (see below) V-Ks(L4.5V) = 11.37 ; GJ1001BC (see below) V-Ks(L4.5V) = 10.92 ; 2M1126 (see below) V-Ks(L4.5V) = 10.75 ; smoothed trend to V-Ks vs. SpT Dieterich14 data V-Ks(L4.5V) = 9.73 ; 2MASS_J17502484-0016151 L4.5 => adopt (V-Ks)(L4.5V) = 10.9 [updated 8/17/2020] M_Ks(L4.5V) = 10.80 ; GJ1001BC (Dieterich14)/unresolved binary M_Ks(L4.5V) = 11.51 ; EEM calib to Dieterich14 data M_Ks(L4.5V) = 11.70 ; fit to SIMBAD L0-T7.5 dwarfs d<25pc (12/2020) M_Ks(L4.5V) = 11.70 ; 2MASS 1126-5003 (Dieterich14) M_Ks(L4.5V) = 11.71 ; 2MASS 2224-0158 (Dieterich14) M_Ks(L4.5V) = 11.74 ; trend to L/T dwarfs in notes (1/2021) => adopt M_Ks(L4.5V) = 11.70 [updated 12/30/2020] Mv(L4.5V) = 22.17 ; GJ1001BC (Dieterich14) Mv(L4.5V) = 22.62 ; 2MA1126-5003 (Dieterich14) Mv(L4.5V) = 22.90 ; V-Ks=11.2, M_Ks=11.7 Mv(L4.5V) = 23.51 ; 2MA2224-0158 (Dieterich14) => adopt Mv(L4.5V) = 22.9 Teff(L4.5V) = 1636 K ; Filippazzo15 calibration (M6V-T9V) Teff(L4.5V) = 1650 K ; Cifuentes20 for CARMENES L4.5V(N=1) Teff(L4.5V) = 1667 K ; Kirkpatrick20 (Table 13 polynomial) => adopt Teff(L4.5V) = 1650K (logT = 3.217) [updated 12/26/2020] logL(L4.5V) = -4.049+-0.048 ; GJ1001BC (Dieterich14) # Examples 2MASS J2224-0158 = 2MASS J22244381-0158521 L4.5V: Dieterich14(source?) Vtan = 53.7km/s(Dieterich14), V=23.82+-0.039, R=20.26+-0.028, I=17.77+-0.022(Dieterich14), J=14.073+-0.027, H=12.818+-0.026, Ks=12.022+-0.023(2MASS). V-R=3.56+-0.05, V-I=6.05+-0.05, V-J=9.75+-0.05, V-H=11.00+-0.05, V-Ks=11.80+-0.05. Teffs: 1567+-88K(Dieterich14), 1750K(Golimowski04,3Gyr), 1700K(Cushing08) GJ 1001 BC = 2MASS J00043484-4044058 L4.5V: Dieterich14(source?) V = 22.77+-0.025, R=19.24+-0.045, I=16.76+-0.012 (Dieterich14), J = 13.109 +- 0.024, H = 12.055 +- 0.026, Ks = 11.396 +- 0.026 (2MASS). V-R = 3.53 +- 0.05, V-I = 6.01 +- 0.03, V-J = 9.66 +- 0.04, V-H = 10.72 +- 0.04, V-Ks = 11.37 +- 0.04. plx = 77.02+-2.07 mas. Vtan = 102.4 km/s! Teffs: 1725+-21K(Dieterich14), 1850K(Golimowski04,3Gyr). logL = -4.05 +- 0.48 dex for each component if equal luminosity(Dieterich14). 2MASS J1126-5003 = 2MASS J11263991-5003550 plx = 59.38+-1.64 mas. V=23.75+-0.010, R=20.11+-0.020, I = 17.51+-0.005(Dieterich14), J=13.997+-0.032, H=13.284+-0.036, Ks = 12.829+-0.029(2MASS). V-R = 3.64+-0.02, V-I = 6.24+-0.01, V-Ks = 10.92+-0.03.