“It’s extremely likely that comet SWAN is in ‘outburst’ mode.”
“That is, some major eruption happened to this otherwise small and faint comet, releasing a massive cloud of hydrogen-rich volatile. SWAN is picking up on this sudden dump of hydrogen into the inner solar system.”
“I doubt that the comet will maintain its current impressive appearance, and will quite possibly fade away soon,”
If you want to get a look, I propose you get your gear out and investigate.