Table 1: Various statistics regarding the data obtained with the 2.2-m MPG-WFI system on three nights (2/3 June 2002, 23/24 and 24/25 Jan. 2003): i) the number of fields and the total sky coverage; ii) the limiting magnitude in $3\times 3$ binning mode and the seeing conditions during the three nights; iii) the total number of asteroid detections in all binning modes. They are followed by two groups: the ONS (One Night Stands) are observations of unidentified asteroids made in the course of only one night. The second group are known asteroids; the sum of these two groups is smaller than the number of detections because some fields from the first night were repeated on the second; iv) the total number of discoveries during the two runs: these are the subset of the known asteroids that were previously unknown and that were observed on two nights, a necessary condition established by the MPC in order to receive credit. It is interesting to notice that a large number of detections comes from unknown asteroids (ONS): the relative number of objects was especially high during the June run because we observed regions south of the ecliptic which are not easily accessible to northern observers. The numbers from the June run are affected by rapid moving clouds during the exposures.
  2/3 June 23/25 January
Number of fields 13 71
Sky covered 3.9 sq.deg. 24.1 sq.deg.
Limiting mag 21.0-22.0 21.0-21.5 (23/24)
    22.0-22.8 (24/25)
Aver. seeing 1.7-2.0 $^{\prime\prime}$ 1.8-2.0 $^{\prime\prime}$(23/24)
    0.7-0.8 $^{\prime\prime}$(24/25)
Total detections 122 661
ONS 93 282
Known asteroids 29 235
Discov. 1 75


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