Masayuki Iwamoto

{| class="wikitable floatright" style="font-size: 0.9em;" |+ Minor planets discovered: 6 |- | 4835 Asaeus || January 29, 1989 || |- | 5399 Awa || January 29, 1989 || |- | 5581 Mitsuko || February 10, 1989 || |- | 6383 Tokushima || December 12, 1988 || |- | 9943 Bizan || October 29, 1989 || |- | 27714 Dochu || January 29, 1989 || |- | colspan=3 style="font-size: smaller;" | # with T. Furuta |}

is a Japanese astronomer from Awa in the Tokushima Prefecture. The Minor Planet Center credits him with the co-discovery of 6 asteroids made together with Japanese astronomer Toshimasa Furuta at the Tokushima-Kainan Astronomical Observatory in 1988 and 1989. He also received the Edgar Wilson Award in 2013 for the discovery of comet C/2013 E2, in 2019 for the discovery of the comets C/2018 V1 and C/2018 Y1 and in 2021 for the discovery of C/2020 A2.

The inner main-belt asteroid 4951 Iwamoto, discovered by astronomers Yoshikane Mizuno and Toshimasa Furuta, was named in his honor on 5 March 1996 (). Provided by Wikipedia