• 164P/Christensen   2019 May 05 23:12 UT, 8 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG STL-6303E B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2019 April 05 00:17:28 UT, 1200s exp. (20x60s), 0.7-m (f/4) L + CCD PL47-10 FLI + R filter, 0.95"/pixel. m1=17.3, Coma 13", DC 4. Fan-shaped tail 15" long spread in p.a. 160-280 deg, curved CW. Alexander Baransky, Kyiv comet station (MPC 585), Ukraine
• 164P/Christensen   2019 March 29 23:12 UT, 8 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG STL-6303E B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2019 March 08 22.53 UT, 15x120 sec.12"/4 ASI 1600 Michael Jäger Weißenkirchen
• 164P/Christensen   2019 February 27 23:00 UT, 4x 5min, 16" f/2.5, CDS-5D Roland Fichtl
• 164P/Christensen   2019 February 26 22:27 UT, 8 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG STL-6303E B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2019 February 23 22:34 UT, 8 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG STL-6303E B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2019 February 15 22:56 UT, 8 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG STL-6303E B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2019 February 14 22:46 UT, 8 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG STL-6303E B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2019 February 03 22:35 UT, 10 x 120s 0.4-m f/3.8 Orion Optics AG16 Newton SBIG ST-10XME B96 - BRIXIIS, Belgium Erik Bryssinck
• 164P/Christensen   2018 December 30 11:14 UT, 3x600s, m=17.6, 11" SCT f/6.4, STF-8300M, Mike Olason, Denver Colorado
• 164P/Christensen   2018 December 30 11:14 UT, 3x600s Gif, m=17.6, 11" SCT f/6.4, STF-8300M, Mike Olason, Denver Colorado
• 164P/Christensen   2018 November 10 02:56:36 UT, 360s exp. (6x60s), 0.7-m (f/4) L + CCD PL47-10 FLI + R filter, 0.95"/pixel. m1=17.3, Coma 16", DC 4. Tail 28" long spread in p.a. 243-332 deg. Alexander Baransky, Kyiv comet station (MPC 585), Ukraine
• 164P/Christensen   2018 October 10 02:36:46 UT, 1020s exp. (17x60s), 0.7-m (f/4) L + CCD PL47-10 FLI + R filter, 0.95"/pixel. m1=17.5, Coma 10", DC 7. Stellar coma, faint tail 27" long spread in p.a. 248-330 deg. Alexander Baransky, Kyiv comet station (MPC 585), Ukraine
• 164P/Christensen   2012 February 27 00:21 UTC, C14 f/7.4, 180 sec.Clear, (c) Bradford Robotic Telescope Michael Hauss
• 164P/Christensen   2012 February 26 21.00 UT, 10"f/3.8 CCD FLI 8300 CCD 6x240 sec. 2x2 bin Michael Jäger
• 164P/Christensen   2012 February 24 00:32 UTC, C14 f/7.4, 180 sec.Clear, (c) Bradford Robotic Telescope Michael Hauss
• 164P/Christensen   2012 February 17 22:55:17 (UT), 1800s exp. (10 stack images), 0.7-m (f/4) reflector + CCD PL47-10 FLI + R filter, Kyiv comet station (MPC 585) Alexander Baransky, Ukraine
• 164P/Christensen   2012 January 27 01:06 UT, S-C 0.25m-f/10, KAF0261E, C-Filter, 5x60sec. Massimiliano Martignoni (Magnago, Italy)
• 164P/Christensen   2012 January 10 01:59 UT, S-C 0.25m-f/10, KAF0261E, C-Filter, 5x60sec. Massimiliano Martignoni (Magnago, Italy)
• 164P/Christensen   2011 December 29 1.27 UT, 10"/f-3.8 2640sec. FLI 8300 CCD 2x2 bin. Michael Jäger
• 164P/Christensen   2011 December 29 02:19:28 (UT), 1080s exp. (10x108), 0.7-m (f/4) L + CCD PL47-10 FLI+R filter, Kyiv comet station (MPC 585) Alexander Baransky, Ukraine

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