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 comet 325P/YANG-GAO (= P/2009 L2 (YANG-GAO) = P/2015 J4 = 1951 K1)

Discovery:

Rui Yang, Hangzhou, Zhejiang, China and Xing Gao, Urumqi, Xinjiang, China discovered a new comet on several survey images (limiting mag about 15) taken by Gao in the course of the Xingming Comet Survey using a Canon 350D camera (+ 10.7-cm f/2.8 camera lens) at Mt. Nanshan on June 15.81. The object, of 14th magnitude, but perhaps brighter visually, was identified as cometary by Yang. It was confirmed by several amateur CCD observers. [IAUC 9052, 2009 June 16]. The comet was around a month past perihelion at 1.3 au at a very favourable opposition and has a period of 6.3 years. This is the second discovery by the Xingming Survey, the first being 2008 C1 (Chen-Gao)

Recovery:

Hidetaka Sato recovered 2009 L2 with the 0.51m iTelescope at Siding Spring on 2015 May 11.38 with confirming images taken on June 9 and 10. [MPEC 2015-L28, 2015 June 10].

In 2018 Gary Kronk and Maik Meyer re-measured the positions of several X/ comets and found that X/1951 K1 was 325P.  The comet passed 0.34 au from Jupiter on 2013 February 28 and this has increased the perihelion distance to 1.43 au.  The linked orbit was finally published on MPEC 2019-F55 [2019 March 21].  It took over a year for this information to be published in a CBET, eventually appearing in CBET 4806 [2020 June 28].