Data source:

me: photoelectric UBV photometry by N.V.Metlova with the SAI Crimean Station 60 cm reflector and V.M.Lyuty's UBV-photometer (partly published by V.P. Goranskij, N.V. Metlova, and E.A. Barsukova, Astrophysical Bulletin V.67, No.1, p.73-81, 2012).
HM: A.Henden, U.Munari, Baltic Astronomy V.17, 293, 2008.
TM: L.Tomasella, U.Munari, T.Tomov, D.Kolev, M.Mikolaewski, M.Rejkuba, IBVS No. 4537, 1997.