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Visual observations Instr : 150mm / f15 Refractor, 8x50 Binocular ICQ Format Comet observations of C/1991 X2 Mueller IIIYYYYMnL YYYY MM DD.DD eM/mm.m:r AAA.ATF/xxxx /dd.ddnDC /t.ttmANG ICQ XX*OBSxxx 1991X2 1992 02 28.78 S 8.0 AA 15.0R15 85 2.5 2 ICQ XX DIE02 1991X2 1992 02 29.78 S 8.0 AA 15.0R15 85 2.5 4 ICQ XX DIE02 1991X2 1992 03 01.79 S 7.9 AA 15.0R15 85 2.5 4 ICQ XX DIE02