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Table 1

Statistics of observations.

Night 2009-Sep.-25 2009-Sep.-26

Duration 4h22m 5h03m
Sources 86 98
Average RA 18h05m 18h58m
Average Dec  −25°32′  −23°48′
Airmass min 1.02 1.00
Airmass max 2.69 2.79
Average seeing
K min (mag) 2.74 4.60
K max (mag) 8.97 10.86
K median (mag) 6.74 8.52
Average J − K (mag) 2.3 1.0
Binaries & Triples 14 10
Extended sources 2 0

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