P/2009 L2 Yang-Gao
- P/2009 L2 Yang-Gao 2009 August 09 21:41 UTC, C14 f/7.4, 60 sec. RGB, (c) Bradford Robotic Telescope (Michael Hauss) Michael Hauss
- P/2009 L2 Yang-Gao 2009 August 04 23h25 UTC, 10x60sec., 60cm-CGT+CCD, Taunus Obs. Stefan Karge
- P/2009 L2 Yang-Gao 2009 July 28 22.09 UT, 8" f=2.8 ASA Astrograph, 3x270 sec.., SXV-H9 CCD Michael Jäger
- P/2009 L2 Yang-Gao 2009 July 25 22:47 UT, 10"Newtonian F=1.5m 373s 800ASA Canon 350D Christian Harder
- P/2009 L2 Yang-Gao 2009 July 16 22:00 UT, Newtonian 300mm F=1600mm, 4 min. SBIG ST7 CCD Manfred Chudy
- P/2009 L2 Yang-Gao 2009 June 30 22.04 UT, 8" f=2.8 ASA Astrograph, 6 x 4 min., Sigma 6303 CCD Michael Jäger
- P/2009 L2 Yang-Gao 2009 June 29 23h53-00:17 UTC, 15x90sec., 60cm-CGT+CCD, Taunus Obs. Stefan Karge
- P/2009 L2 Yang-Gao 2009 June 19 23:22 UT, 8"-SCT, f=1260mm, Canon EOS 500D, 8 x 45sec. (ISO 3200) Michael Hauss
- P/2009 L2 Yang-Gao 2009 June 18 01:59 UTC, C14 f/7.4, 60 sec. RGB, (c) Bradford Robotic Telescope (Michael Hauss) Michael Hauss
- P/2009 L2 Yang-Gao 2009 June 18 21.28 UT, 8" f=2.8 ASA Astrograph, L=12 x 4 min. + 2 x 9 min Halpha + RGB, Sigma 6303 CCD Michael Jäger
- P/2009 L2 Yang-Gao 2009 April 30 20.40 UT, Leica Apo f=180mm f/5.6, green filter 500 sec.. Michael Jäger
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