B0.7V Walborn71 called HD 201795 a B0.7V standard. All Q-method calculations in this file have been updated using most recent calibration (10/9/2011). B-V(B0.7V) = -0.288 ; EEM dereddened pri. stan. HD 201795 via Q-method U-B(B0.7V) = -1.028 ; EEM dereddened pri. stan. HD 201795 via Q-method Mv(B0.7V) = -3.42 mag ; Bowen08 Teff(B0.7V) = 29000 +- 300 K ; non-standard HD 36960 (Nieva14) # Primary Standard HD 201795 *B0.7V: Walborn71(stan),Walborn72 B1V: Morgan53,Jaschek64(all),Jaschek78(Morgan53) B3: Cannon Mermilliod91: V=7.527+-0.020, B-V=-0.039+-0.010, U-B=-0.848+-0.025 => using updated Q-method (10/9/2011) => (B-V)o = -0.288, (U-B)o = -1.028, E(B-V) = 0.249, Av=0.805. # Other star HD 22951 = 40 Per = omi Per = HR 1123 *B0.7V: Walborn72 B0.5V: JM53,Jaschek64(all),Jaschek78(Murphy69),Garcia89 B2: Cannon B1IV: Lesh68 B1.5IV: Abt83 B0V: Berger55 Some scatter in the published values. I adopt Walborn's value as he was placing the O/B stars on a denser grid of standards.