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Re: (meteorobs) Leonid report - narrative - Nov 17/18, Mt. Lemmon, AZ (ATAJU)
I checked using Guide 7 and here in Edmonton (Elev 672 m) on the 18th the
radiant center rose at 05:27 UT.
If at 111 km elevation the radiant center would have risen at 03:37 UT.
Larry Wood
> Mike,
> It is also possible for the radiant to be below the horizon for an
> observer on the ground, but the 100 to 120 km height of Leonid's start of
> light to be above the horizon. Jim Richardson wrote an article about it a
> few years ago. I believe the conclusion was that the radiant can be almost
> 10 degrees below the horizon, but I'll have to check on that...my math
> isn't currently in use enough to figure it out.
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