Observations of the occultation of SAO 210301 = TYC 7902-01828-1 
(mag. 8.4) by the asteroid (54) Alexandra on 2005 May 17

          P o s i t i o n s
Sta.  Observer, Location                   Longitude  Latitude    h
  #                                          o '  "    o '  "     m
  1 Chad Ellington,American Horse Lake,OK - 983026.4 +353747.9  495
  2 Peter Armstrong, Fort Davis, Texas    -1035909.6 +303712.0 1708
  3 Kerry Coughlin, Miraflores, Mexico    -1094548.3 +232026.6  223
  4 Mitch Brumbelow, West Texas           -1005551.4 +324157.8  718
  5 Richard Nugent, Big Lake, Texas       -1015034.2 +311354.7  871
  6 Paul Maley, Acuff, Texas              -1012949.0 +333350.5 1016
  7 David Dunham, San Bartolo, Mexico     -1095103.8 +234419.6  404
  8 Roc Fleishman, San Jose del Cabo, MX  -1094410.3 +23 115.8  110
  9 Rebecca Alestick, Gutherie, OK        - 972256.5 +354653.0  345
 10 Art Lucas, Stillwater, OK             - 970811.0 +360337.3  323
 11 Craig Smith, e. of Midland, TX        -1015434.8 +315854.6  878
 12 Daniel Falla, e. of Midland, TX       -1015012.5 +32 037.4  880
 13 David Dunham remote, Santiago, Mexico -1100119.1 +234703.4  420
 15 Derald Nye, Marfa Lights, Texas       -1035256.7 +301631.1 1593
 16 Daniel Castillo Jordan, nw La Paz, MX -1102953.9 +241019.8   20

     The timings given to 2 decimal places are video timings; others 
were visual.  The first time is either the time of Disapperance, or
the time of closest approach to the solution ellipse center for those who 
had a Miss (no occultation), as indicated by a D or M in the D/M column 
following the disappearance time.  Daniel Falla (station 9) timed the 
reappearance, but not the disappearance.  Rebecca Alestick only timed the 
duration as 9 seconds at her location; this was fixed and her D time was 
then adjusted until both events were in best agreement with the 
elliptical fit determined from the other observers, and then her crucial 
southern chord was included in the final elliptical fit. 

         T i m i n g s
   Disappearnance  Reappearance
Sta.   UTC  D/M      UTC
  #  h m  s         h m  s
  1  81531.8 D      81633.4 
  2  82056.2 D      82057.1 
  3  82654.95D      82713.60
  4  81748.  D      81851.  
  5  81847.39D      81950.82
  6  81804.48D      81855.65
  7  82654.5 M  
  8  82654.1 D      82733.3 
  9  81530.  D      81539.  
 10  81526.5 M  
 11  81841.4 D      81942.3 
 12  no time D      81937.  
 13  82654.5 M  
 15  82042.52D      82116.71
 16  82654.5 M