B7III eta Tau is the best southernly accessible standard (J0347+2406) JM53 standard: eta Tau (=HR 1165) - B7III bet Tau - B7III Garrison67 standard: eta Tau (=HR 1165) - B7III Lesh68 standard: eta Tau - B7III Abt68 standard: bet Tau - B7III Cowley69 standard: eta Tau - B7III MK73 dagger standard: eta Tau (=HR 1165) - B7III Houk standard: HR 3898 (=HD 85355) - B7III [adopted from Hiltner69] MK78 standard: bet Tau (=HD 35497) - B7III alf Scl (=HD 5737) - B7III (CII) 20 Tau (=HD 23408) - B7III (FeII) WiegertGarrison98 stan: HR 6460 - B7III GrayCorbally10: eta Tau - B7III [from MK73] # No standard MK43, Hiltner69, Garrison77, and Houk does not list a B7III standard. # Primary Standard eta Tau = Alcyone = HR 1165 = HD 23630 = Cl* Melotte 22 1432 (J0347+2406; V=2.9) B7III: JM53,Lesh68(stan),MK73(dagger),GarrisonGray94,GrayNstars B7IIIe: Slettebak82,Jaschek92 B8III:: MK43,Herman58 B6.1(III): Kopylov58 Famous bright (V=2.9) Pleiad. Originally "B8III" in MK43, but "B7III" in JM53 and after. Discussed at length on p. 20 of Maury & Pickering (1897) as a prototypical stellar type. # Secondary Standard HR 3898 = HD 85355 (J0949-4543; V=5.1) B7III: Hiltner69,Houk78(sec. stan. from Hiltner69) B8: Cannon Houk reports vsini=130 km/s. bet Tau = HR 1791 = HD 35497 (J0526+2836; V=1.7) B7III: JM53,Osawa59,Palmer68,Abt68(stan),Cowley72,MK78,GarrisonGray94 B7.5III: Williams36 B8III: MK43 B8IV: Miczaika51 B5.5IV: Zorec09 20 Tau = Maia = HD 23408 = HR 1149 = Cl Melotte 22 785 (J0345+2422; V=3.8) B7III: Miczaika51,JM53,Mendoza56,Jaschek64(most),Molnar72,GarrisonGray94 B7III(FeII): MK78 B7IIIsn: Abt78 B7: Binendijk46 B8III: Lesh68,Grenier99 B5: Cannon B5III: Chalonge52 B6.5III: Zorec09 B8.5V: Palmer68 Frequently considered B7III through GarrisonGray94. Cannon noted Si II,Mg II strong, and MK78 noted "(FeII)" # Variant Standard alf Scl = HD 5737 (J0058-2921; V = 4.3) B7III CII: MK78 B7IIIp: Houk82(Garrison type) B7II+ CII: GarrisonGray94 B8III: Wood55,deVaucouleurs57 Bp CII: Bond71 B5: Sanduleak68