Tail visible in negative image， ~15' The comet is named after the SWAN camera onboard the Solar and Heliospheric Observatory (SOHO). Australian amateur astronomer Michael Mattiazzo noticed the comet in online images. SWAN is a special camera that maps hydrogen in the solar wind, which suggests this comet may be rich in the element. Comets-ml Hositosorekara aka Alpheratz 4 Apr 2025 Kumagayakimura Skyandtelescope Mike Olason Projectplu to Cloudynights Hikarigai It's so new a discovery that aerith and vanbuitenen has not updated yet SWAN25F is just a placeholder, official name TBA