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November 3, 2009

Leonid meteors are up next

Astronomers are predicting an exceptional year for the annual Leonid meteor shower, which will peak two weeks from today. The Leonids are among the best meteor displays on the astronomical calendar. November nights (with luck) can be clear and crisp, and this shower has occasionally ramped up to very high - even storm - rates.

This year's viewing, assuming the weather cooperates, will be enhanced by the total absence of moonlight; the moon will be "new" that night.

But the best hope for sky watchers is that the people who have learned to forecast these things seem to be in broad agreement that the Earth this year will be passing through the core of some heavy streams of dust left behind by the comet Tempel-Tuttle in past centuries.

Leonid meteors 1998If they're right, observers in central and eastern Asia will have the best view, with meteor rates forecast to exceed several hundred per hour as we slip through the dust left by the comet during its passes through the inner solar system in the years 1466 and 1533.

That will occur 12 to 14 hours after the best viewing time for those of us stuck here in eastern North America, according to an article on Space.com

Here, in the hours between 3:30 and 5:30 a.m. Nov. 17, the Earth will pass through a separate stream of comet dust, spread by Tempel-Tuttle during its pass through the region in the year 1567. Forecasters anticipate "modest" meteor rates of 25 to 30 per hour. Not spectacular, but a very nice display if they're right.

And if we're clouded out, we'll get another chance early on the 18th. The Leonids are typically active a few days before and after the peak on the 17th and 18th.

The best thing about these meteors, forecasters say, is that many will leave persistent trails as they streak into the atmosphere. A couple dozen of those during a morning's watch would be something to remember.

And in the meantime, if you just can't resist getting out of bed to stand around in the cold at midnight or later, the annual Taurid shower is about to begin. It peaks between the 5th and 12th of November and, while not nearly as numerous as the Leonids, the Taurids can and do produce some spectacular fireballs. 

As with all meteor showers, you'll need clear skies and a dark location far from urban lighting. And if you're successful, be sure to come back here, drop us a comment, and let everyone know where you were, and what you saw. Clear skies! 

(AP Photo/Leonid meteors, Nov. 17, 1998)

Posted by Frank Roylance at 10:18 AM | | Comments (4)
Categories: Sky Watching
        

Comments

I live in Southern Maryland. Which direction should my lawn chair be facing early on the 17th?

FR: Doesn't really matter. If you trace the path of each meteor backwards, they will all appear to emanate from the constellation Leo, which rises in the northeast around midnight. But you will see them appear anywhere in the sky. Think of yourself as riding in a car through a snowstorm. The flakes are flying all around you, but they all seem to be coming at you from your direction of travel. They're smacking head-on into your windshield, flying into your headlights, or zipping horizontally past your side windows.Leo, at this time of year, is where the Earth appears to be headed as it travels around the sun.

At 7:15 PM on November 8th, 2009 I witnessed a streak of white/green light moving across the sky from south to north about 20 degrees above the horizon traveling at a slight down angle. The light was brightest at the head with a long tail. The light was visible for about 4 seconds. Unfortunately I wasn't prepared with a camera since I was just watching TV and saw it out of our western facing window. I live in Colton, Oregon.

Weatherwise, which morning is looking better, Tuesday morning or Wednesday morning? Weather.com and accuweather are giving different forecasts!

FR: This is going to be touch and go. Monday morning looks like we will be dealing with fog. Tuesday morning looks like it will be a bit drier, but we may have more high clouds to contend with. Wednesday morning looks a bit cloudier still. So, on balance, I'd pick Tuesday morning, which also is closest to the peak. Good luck!

Any spots where people will be gathering to watch?

FR: Alpha Ridge Park in Howard County is a good site, where members of the Howard Astronomical League often gather for events like this. No word yet, but check their Web site; http://bit.ly/2VtZpd

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About Frank Roylance
Frank Roylance is a reporter for The Baltimore Sun. He came to Baltimore from New Bedford, Mass. in 1980 to join the old Evening Sun. He moved to the morning Sun when the papers merged in 1992, and has spent most of his time since covering science, including astronomy and the weather. One of The Baltimore Sun's first online Web logs, the Weather Blog debuted in October 2004. In June 2006 Frank also began writing comments on local weather and stargazing for The Baltimore Sun's print Weather Page.

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