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I seem to have found my niche here at ATS. Perhaps I should change my name to "Meteor Man"
Originally posted by TheAgentNineteen
I saw a good Meteor tonight, looking towards the WNW. It was headed in a WSW direction, and actually had a bit of Yellow Coloration (Sodium) to it as well. Normally, even during Meteor Showers, you are fortunate in my locale to witness Bright White Meteors. When you notice the Coloration, this is relatively rare. The best Meteor I ever witnessed was a Bright Green (Copper) one about Five Years ago, which was NOT during any known Showers.
This heating is a very rapid process caused by the meteor compressing the air ahead of it and raising the temperature (kinetic energy of the air molecules) to the point where the air becomes ionized (a plasma). In returning to the un-ionized state (free electrons reuniting with the atoms/molecules) the atoms/molecules give off light which appears to envelop the meteor (one does not see the meteor itself, but rather the envelope of heated air).
The atomic oxygen OI 5577A emission (the "forbidden" line) appears primarily
in the wake of high-velocity meteors. The Leonids, at 71 km/s certainly
qualify as high velocity, and I'm not surprised to see the number reported
as green! Borovicka et al (1996) unexpectedly identified emission lines of
OIII at 5007A in spectra of two long-enduring Perseid trains.
"Our images for the first time confirm that most meteor light comes from a bright plasma just behind the meteoroid," says Leonid MAC PI Dr. Peter Jenniskens of the SETI Institute at NASA Ames Research Center. This confirms conclusions made indirectly from spectroscopic studies in prior Leonid MAC missions. "The images now provide dimensions of the gas cloud behind the meteoroid", says Jenniskens, "and tell us how long organic molecules have to endure a hot plasma before cooling down". Just behind the gas cloud, a wake develops that is thought to be due to green forbidden line emission of OI at 557.2 nm.
Originally posted by TheAgentNineteen
Someone about 70 + Miles West of my location also witnessed it a few minutes before I did. That particular rock was as brilliant as a Firework.
Originally posted by TheAgentNineteen
Anyways, I just thought that I would give some folks a heads up on my sighting tonight, especially in relation to the Leonid Shower.