Explosive Impact at Jupiter Spotted by Amateur Astronomers

A fireball was recorded entering the gas giant's atmosphere at 1335 GMT on September 10, reminiscent of the scarring impact of comet Shoemaker-Levy 9 there in 1994

By SPACE.com and Tariq Malik

Amateur astronomer George Hall captured this image of an apparent impact on Jupiter while recording video telescope observations of the planet on Sept. 10, 2012, from Dallas Texas. Image: George Hall/George's Astrophotography

An apparent impact on Jupiter early Monday (Sept. 10) created a fireball on the planet so large and bright that amateur astronomers on Earth spotted the flash.

The surprising impact on Jupiter?was first reported by amateur astronomer Dan Peterson of Racine, Wisc., who was observing the largest planet in our solar system when the event occurred, according to the website Spaceweather.com, which tracks space weather and night sky events.

"It was a bright flash that lasted only 1.5 ? 2 seconds,"?Peterson told Spaceweather.com. Peterson used a Meade 12-inch LX200GPS telescope to observe the event, which occurred near the southern edge of Jupiter's northern equatorial belt of clouds. ?

In a report?posted on the Cloudy Nights forum, Peterson said it wasn't clear if the impact would leave a scar on Jupiter much like those seen in 1994, when the comet Shoemaker-Levy 9 broke into pieces and peppered the planet with debris, creating visible impact marks in Jovian cloud tops. It is also not yet known if the object to strike Jupiter was a small asteroid or comet.

"My best guess is that it was a small undetected comet that is now history, hopefully it will sign its name on Jupiter's cloud tops," Peterson wrote.

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In Dallas, Texas, amateur astronomer George Hall read Peterson's initial report on an online Jupiter-observing forum.

"When I saw the post, I went back and examined the videos that I had collected this morning,"?Hall wrote on his night sky photography website?on Monday.

Sure enough, Hall had captured a video of the Jupiter impact and reported that it occurred at 6:35 a.m. CDT (1335 GMT) on Sept. 10. He used a 12-inch LX200GPS telescope equipped with a 3x Televue Barlow and Point Grey Flea 3 camera.

"The popularity of modern digital imaging combined with the tenacity and hard work of dedicated planetary observers has paid off yet again with a visual report of a fireball event in Jupiter's atmosphere being reported visually and then being confirmed by stills from a movie sequence," astronomer and astrophotographer Pete Lawrence, a BBC night sky presented who runs the DigitalSky website, told SPACE.com in an email. "The fact that such events have now been reported before may be a catalyst for visual observers to keep watch for them."

This graphic of Jupiter by UK astronomer Pete Lawrence shows the location of the Jupiter impact region from Sept. 12, 2012, as seen through an inverting astronomical telescope. The impact site is located at longitude system II 335, latitude +12. CREDIT: Pete Lawrence/DigitalSky.org.uk

Source: http://rss.sciam.com/click.phdo?i=62385b4a9318bedcac3b181c7ee0b59e

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