File name      : observation2018.LOR
    Reduction date : 2019年5月11日
    Ephemeris      : DE430 (1550/2650), VSOP87A
    Limb basis     : LRO Lunar Orbiter Laser Altimeter [LOLA]
    O-C basis      : limb correction applied
    
    Telescopes:
     Aperture   Longitude      Latitude   Alt
    #   cm       o  '   "      o  '   "     m
    A   25    +138 50 26.4   +37 26 43.6   31
    
    ref Tel Observer             Star No.     y  m  d  h  m   s    PhGrMrCeDb    O-C 
    
    001  A  E. Imai          S  78788  2018  4 21 11 27 19.73  DD   G 1      0.05
    002  A  E. Imai          S  78793  2018  4 21 11 35 58.67  DD   G 1      0.04
    003  A  E. Imai          S 186876  2018 10 15 10  0 48.51  DD   G 1     -0.03
    004  A  E. Imai          R   2683  2018 10 15 10 26 16.82  DD   G 1      0.01
    005  A  E. Imai          S 164487  2018 11 15 11  5  1.67  DD   G 1      0.00

    006  A  E. Imai          S 164491  2018 11 15 11  8  6.09  DD   G 1      0.00
    007  A  E. Imai          S 164494  2018 11 15 11 11 27.60  DD   G 1      0.00
    008  A  E. Imai          S 164504  2018 11 15 11 43 53.64  DD   G 1      0.01
    009  A  E. Imai          S 164510  2018 11 15 11 52 11.51  DD   G 1      0.01
        
    Mean residual of events involving single stars: 0.03" ±0.07"
    
    
    Explanation of columns 'PhGrMrCeDb'
    Ph - Phase of the event.
         1st character D = disappear, R = reappear, B = blink, F = flash, M = Miss
         2nd character D = dark limb, B = bright limb, U = in umbra of lunar eclipse
    Gr - G if the event is during a graze
    Mr - Method of timing and recording. Main types are:
         G = video with time insertion, V = video with other time linking
         S = visual using a stopwatch, T = visual using a tape recorder, E = eye/ear
    Ce - Certainty. 1 = certain, 2 = may be spurious, 3 = most likely spurious
    Db - Double star indication - West, East, North, South, Brighter, Fainter