STORY: The galaxy whirlpool "seems to be related to the SpaceX company's launch of a new satellite," National Astronomical Observatory of Japan representatives said on Twitter.
SpaceX had launched a Falcon 9 rocket from Cape Canaveral to deploy a satellite into a medium-earth orbit earlier on the same day.
The Subaru-Asahi Star Camera is jointly operated by NAOJ (Subaru Telescope) and Asahi Shimbun, a Japanese newspaper company.