Comet Iwamoto, formally designated as C/2020 A2 is a faint non-periodic comet that was observed between January and April 2020. As of 2025, it is the fourth and most recent comet discovered by Japanese astronomer, Masayuki Iwamoto.
Observational history Masayuki Iwamoto reported a new 14th-magnitude object with cometary features on the night of 8 January 2020, which was moving gradually north within the constellation Ophiuchus. Nearly five days later, Gennadiy Borisov confirmed the existence of Iwamoto's new comet, reporting that it has a diffuse coma about 40 arcseconds in diameter. Additional observations from the Xingming Observatory, Magdalena Ridge Observatory, and other sites between 10 and 14 January 2020 reveal that the comet does not have a tail at the time.
See also C/2018 Y1 (Iwamoto)
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External links C/2020 A2 at the JPL Small-Body Database C/2020 A2 at Gideon van Buitenen's website C/2020 A2 at Seiichi Yoshida's website C/2020 A2 at In-The-Sky.org