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Visual observations Instr : 150mm / f8 Refractor, 20x50 Binocular. ICQ Format Comet observations of : C/1999 S4 Linear IIIYYYYMnL YYYY MM DD.DD eM/mm.m:r AAA.ATF/xxxx /dd.ddnDC /t.ttmANG ICQ XX*OBSxxx 1999S4 2000 06 20.01 S 9.7 AC 15.0R 8 30 2 6 ICQ XX DIE02 1999S4 2000 06 27.01 S 9.0 AC 15.0R 8 30 2 6 5 m265 ICQ XX DIE02 1999S4 2000 06 28.00 S 8.9 AC 15.0R 8 30 2 4 ICQ XX DIE02 1999S4 2000 06 29.00 S 8.6 AC 15.0R 8 30 2 4 5 m270 ICQ XX DIE02 1999S4 2000 07 04.02 S 8.2 AC 15.0R 8 30 3 5 ICQ XX DIE02 1999S4 2000 07 21.92 S 6.8 AA 5.0B 8 ICQ115 DIE02 1999S4 2000 07 20.90 S 7.3 AA 15.0R 8 30 7 6 20.0m355 ICQ115 DIE02 1999S4 2000 07 17.96 S 7.4 AC 15.0R 8 30 7 5 20.0m330 ICQ115 DIE02