Astrometrica 2.1 Demo-Images
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  The CCD images  described here  were  taken  at  the  private  observatory
  Obermair/Meyer (MPC Observatory Code 540), which is located at 48.4425ø N,
  14.2753ø E, 815m above sea level, using a ST-6 CCD camera on a 288mm f/5.2
  Schmidt-Cassegrain at prime focus.
  
  
  C94O_01.ST6, C94O_02.ST6
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  These  two  images,  taken   on   September  8,  1994,  show  comet  1994o
  "P/Machholz 2".  Using  the  contrast  scaling  functin   (F7 key)   while
  measuring the image,  it's easy to pick out the nearly stellar nuclear re-
  gion within the bright coma and make precise measurements of it.

  Some 5' northeast of the comet, one (Fragment "B") of four faint,  diffuse
  companions can be seen on these 30 second  frames.  However,  for  precise
  astrometric observations of this compnent,  a  longer integration time has
  been necessary.


  1602_01.ST6, 1602_02.ST6
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  These two images were taken on March 11, 1994 in order to refine the orbit
  of minor planet  (1620) "Geographos"  in preperation  of the flyby  of the
  "Clementine" spacecraft on schedule later that  year.  Unfortunately,  the
  mission has been cancelled later due to a failue of the spacecraft.

  By chance, another minor planet, (5833) 1991PQ, was caught on the  images.
  It's easy  to  pick  out  both  asteroids  using  the  blinkcomperator  of
  "Astrometrica's" full version.

  By using the 'Remeasure Object'-Function, the position of the minot planet
  can be measured very quick, without measuring the background and reference
  stars,  again.  If you want the results to be compared with the calculated
  position, remember to load the respective orbital elements.

  The images were taken using the ST-6  "Track and Accumulate" - mode. Using
  manually noted times  (Universal Time UT)  when each of the individual ex-
  posures began, one can calculate the time of mid-exposure as shown here:

                               1620_01.ST6      1620_02.ST6

   Start of Exposure 1:           19:13:33         19:32:43
   Start of Exposure 2:           19:15:30         19:34:29
   Start of Exposure 3:           19:16:58         19:35:57
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   Mean:                          19:15:20         19:34:23

   Half the integration time
   of an individual Exposure:   + 00:00:30       + 00:00:30
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   Time of mid-exposure:          19:15:50         19:34:53