Masakatsu Aoki

Masakatsu Aoki (青木 昌勝, Aoki Masakatsu, born 1957, Toyama Prefecture) is a Japanese amateur astronomer who operates from his private Aoki Astronomical Observatory () at Toyama, Toyama Prefecture, Japan.

His main interest lies in supernovae of which he has discovered a total of 13, such a SN 1999eu as well as SN 2000db and SN 2000di. In 2016, he discovered the supernova SN 2016C in NGC 5247. In the course of his search, he has also discovered two asteroids during 1996–1997. He has named the asteroid 58627 Rieko in honour of his wife.