B1.5IV

# Non-standard stars

Lam Sco = HR 6527 = HD 158926
    *B1.5IV: Hiltner69
    B2IV: MK43
    B1Vk: Buscombe69
    B2V: Hoffleit62

    V=1.63 (Johnson66), V=1.620+-0.008 (Mermilliod91), B-V=-0.22
    (Johnson66), B-V=-0.231+-0.008 (Mermilliod91),
    U-B=-0.89(Johnson66), U-B=-0.898+-0.013(Mermilliod91).  logN_HI =
    19.23 (York83). Using Savage & Mathis 1979 relation, this suggests
    E(B-V) = 0.0035. Hence, Q = -0.732, (B-V)o = -0.235, (U-B)o =
    -0.901.

HD 64740 = HR 3089
    B1.5Vp: Hiltner69
    B2V: Houk82, 1976A&AS...26..241C

    vsini=274 km/s (Houk78). V=4.629+-0.003(Mermilliod91),
    V=4.63(Johnson66), B-V=-0.234+-0.005(Mermilliod91),
    B-V=-0.23(Johnson66), U-B=-0.922+-0.004(Mermilliod91),
    U-B=-0.93(Johnson66). logN_HI=20.26+-0.13(Bohlin83), 20.35+-0.10
    (Shull85). I adopt logN_HI = 20.32.  Using Savage & Mathis 1979
    relation, this suggests E(B-V)= 0.0435. Hence Q=-0.754,
    (B-V)o=-0.278, (U-B)o=-0.953.