Dennis di Cicco (/diːˈtʃiːkoʊ/,^[2] born 1950) is an American amateurastronomer and adiscoverer of minor planets, who lives inNew England.

He has discovered 60 numberedasteroids from his backyard observatory inSudbury, Massachusetts (IAU code:817).^[1] He was a member of the editorial staff ofSky and Telescope magazine from 1974 until his resignation as senior editor in June 2014.^[3] His special interests include astronomical photography and the history of astronomical photography,telescope making, and astronomical observing. During 1978 and 1979 he was the first person to successfully photograph theanalemma, making 48 separate exposures on a single piece of film during a 12-month period. The project is described in the June 1979 issue ofSky & Telescope. The asteroid3841 Dicicco was named after him.^[4]

Di Cicco conducted observations and calculations to determine the exact time and date of Ansel Adams’ famous 1941 photograph,Moonrise, Hernandez, New Mexico.

He grew up in Hanover, Massachusetts.

• Moonrise, Hernandez, New Mexico

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