Many of us had the pleasure to meet him at various Rosetta Mission events held at ESOC, and we are certainly very glad that he could see 'his' comet up close, and follow the mission right through until its conclusion just a couple of weeks ago.
Our condolences to his family and friends in this time.
This is an image of Comet 67P/C-G that Klim Churyumov took in January 2016 and shared in the Amateur Observing Group, PACA_Rosetta67P. Professor Churyumov encouraged the participation of amateur astronomers to observe the comet.
Read more about Klim Churyumov in this interview from 2014.