November 17, 2000 the NCAS decided to try and calculate how high a meteor is when it 'streaks' across the sky.
a group of us got together and descended on the Pawnee Prairie Grasslands
Dark Skies, while Jan & Dave stayed in Ft. Collins,
during the Leonid meteor shower. . . . .
. . . . ..
path through space is shown in blue. Auburn-colored ellipses denote dust
streams laid down by comet Tempel-Tuttle
in the indicated years. Until they disperse after a few centuries, these narrow trails are regions that have a high density of
meteoroids and so there is a meteor storm if the Earth passes through one. This year our planet will pass close to trails deposited
in 1932, 1733 and 1866. In 2001, Earth will move more directly through streams from 1767, 1699 and 1866.
plot is courtesy of Dr. David Asher (copyright 2000, all rights reserved)
Collins- Cactus Flats 2000 Event
Harold Porter: Who calculated where to point in the sky at 10 minute intervals and I will include them,visited sites.
Dave Chamness- imager Ft. Collins.
Jan Kok- imager Ft.Collins.
Sterling Area 2001 Event
Terry Moore - handled the ham radio & kept Ray alert.
Ray Warren- provided the cameras used by himself for the southern images & Phil OKunewick(north).
Phil OKunewick- north image of exploding bolide set, did much of the coordination on Terry & imagery.
Tom Teters - setup at Cactus flats South I shot two rolls of film, got great resolution and NO meteors.
of us was about a mile and a half apart. on an approximately east/west
And while Jan at least got other meteor streaks in his imagery, .....................
Dave Chamness and Jan Kok took the 'winning shots of the same meteor.
This image directly overlays the starfield, so the angular seperation of
the two exspoures can be calculated.
Here's another 3D image for you
Now to 2001 Bolide burst in Leo taken byTerry & Phil
'Here is Terry Moore's page, with original scans of the exploding bolide . Some of Terry's narative:
This is a rather bright meteor in Leo, Nov. 17, 2001, @ about 2-3AM local
It was only caught in its entirety on the Ray's southern camera.
This was intended to be a 5 minute exposure, but once this meteor appeared, we closed the shutters.
HAM radio was used between the cameras to point the cameras and syncronize the shutters.
North - Phil's Image
South - Ray's Image
Author's note: I added the bottom part of the left image for purely cosmetic reasons.
Method of Calcuating Seperation of Meteor Trains
measure the distances in Photoshop & use the Pythagorean formulae.
By identifiying a star in Leo next to Chertan, called SAO 99508, a 9.2 mag. G0 star and
overlaying the Images at the metor train we come up with these distance:
distance between the meteor trails is: 43.6 pixels
The distance between Regulus & Chertan is: 440.6 pixels, 16* 21'41" or 58,901 arc"
Hence: 133.68 arc" = 1 pixel
a little Trig.
The distance between the meteor trails is: 1* 37' 08.6" (1/2= 0* 48' 34.3")
The distance between the photographers was 16,934.25 feet (1/2=1.6036 miles) 01/17/11
Math to calculate height
Further Questions to be answered
Tempus Sans ITC