A bright comet has emerged from behind the sun, surprising astronomers. Introducing, Comet SWAN25B

"The comet is magnitude 7.5, bright enough to see with backyard telescopes," reports Ernesto Guido. "This is our confirmation image taken just a couple hours ago via the Spaceflux network."

The comet is named after the SWAN camera onboard the Solar and Heliospheric Observatory (SOHO). Amateur astronomer Vladimir Bezugly 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.

This Sept. 12th photo from Michael Mattiazzo of South Australia highlights the comet's 2-degree ion tail:

"It is probably in outburst post-perihelion," says Mattiazzo. "A similar situation occurred with comet C/2004 H6."

The comet's orbit is still being determined. Initial astrometry suggests it has already passed through perihelion (its closest approach to the sun). Next, it might make a close approach to Earth (0.25 AU) in October.

The comet's future visibility remains unknown. It might be on the verge of falling apart--or poised for a good show as it approaches our planet. Observations in the days ahead will tell us more about its prospects. For current coordinates, check the Minor Planet Center's Possible Comet Confirmation Page.