Data sources:
pg: photographic B observations based on digitized plates of Moscow SAI collection.
pe: photoelectric B observations by V.P.Goranskij with 60-cm telescope of SAI Crimean Station and V.M.Lyuty UBV photometer.
c7: CCD BVR observations by V.P.Goranskij with 60-cm telescope of SAI Crimean Station, 38-cm telescope of Crimean Astrophysical Observatory and CCD SBIG ST-7.
SO,6m: UBVRc observations by E.A.Barsukova and V.P.Goranskij with SAO RAS 1-m Zeiss, 6-m BTA telescopes, and CCD EEV 42-40.
a7,47: CCD BVR observations by V.P.Goranskij with SAI 60-cm telescope of SAI Crimean Station and CCDs Apogee A7p and A47.
VA: CCD BVR observations by V.P.Goranskij with SAI 60-cm telescope of SAI Crimean Station and CCD Princeton Instruments VersArray.
Pi: CCD VR observations by V.G.Metlov and V.P.Goranskij with SAI 50-cm Maksutov telescope of SAI Crimean Station and CCD MEADE Pictor-416 (Rc = Rc(Pi)+0.040).
A5: CCD BVR observations by V.G.Metlov with SAI 50-cm Maksutov telescope of SAI Crimean Station and CCD Apogee Alta-F8300 (B = B(A5)+0.040; Rc = Rc(A5)-0.027).