Geminid Meteor Shower

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Pallas_artist_s_rendering-prv
An artist’s conception of an impact event on Pallas. This artwork was created using the three-dimensional shape model published by Britney Schmidt, et al. in Science. Credit: Image courtesy of B. E. Schmidt and S. C. Radcliffe.

THUNDER BAY – The weather tonight in Thunder Bay is not likely to make seeing the Geminid Meteor Shower that will be peaking over the next two days.  The Geminid meteor shower is the most intense meteor shower of the year. It lasts for days, is rich in fireballs, and can be seen from almost any point on Earth.

Fort William Historic Park is home to the David Thompson Astronomical Observatory, and they have an event planned for tonight.

For viewers in Thunder Bay, the forecast is calling for mainly cloudy skies, for Thursday night there is a 30 percent chance of flurries. For Friday the weather will be mainly cloudy. For Saturday the forecast is calling for snow or rain. 

NASA astronomer Bill Cooke’s says “The Geminids are my favorite, because they defy explanation.”

Most meteor showers come from comets, which spew ample meteoroids for a night of ‘shooting stars.’ The Geminids are different. The parent is not a comet but a weird rocky object named 3200 Phaethon that sheds very little dusty debris—not nearly enough to explain the Geminids.

“Of all the debris streams Earth passes through every year, the Geminids’ is by far the most massive,” says Cooke. “When we add up the amount of dust in the Geminid stream, it outweighs other streams by factors of 5 to 500.”

David Thompson Observatory

This makes the Geminids the 900-lb gorilla of meteor showers. Yet 3200 Phaethon is more of a 98-lb weakling.

3200 Phaethon was discovered in 1983 by NASA’s IRAS satellite and promptly classified as an asteroid. What else could it be? It did not have a tail; its orbit intersected the main asteroid belt; and its colors strongly resembled that of other asteroids. Indeed, 3200 Phaethon resembles main belt asteroid Pallas so much, it might be a 5-kilometer chip off that 544 km block.

NASA is offering Livestream Coverage of the Geminid Meteor Shower

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