P/2009 Y2 Kowalski
- C/2009 Y2 Kowalski 2010 February 07 19:21 UT, 24 min., 12"SCT f/5.65, CCD ST10XME clear-filter, 18.58 mag, no coma, no tail Bernhard Häusler
- C/2009 Y2 Kowalski 2010 January 16 20:28 UTC, C14 f/7.4, 120 sec. No Filter, (c) Bradford Robotic Telescope (Michael Hauss) Michael Hauss
- C/2009 Y2 Kowalski 2010 January 16 18.03 UT, 8" f=2.8 ASA Astrograph 4x300 sec.., SXVH-9 CCD Michael Jäger
- C/2009 Y2 Kowalski 2009 December 26 19:22 UT, 18 min., 12"SCT f/6.5, CCD ST10XME clear-filter, 19.07 mag, no coma Bernhard Häusler
- C/2009 Y2 Kowalski 2009 December 26 19:22 UT, 18 min., 12"SCT f/6.5, CCD ST10XME clear-filter, 19.07 mag, no coma Bernhard Häusler
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