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RE: (meteorobs) Leonid report - narrative - Nov 17/18, Mt. Lemmon, AZ (ATAJU)

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.

Wayne

----------
From: 	mlinnolt@alum.mitdot edu[SMTP:mlinnolt@alum.mitdot edu]
Sent: 	Monday, November 26, 2001 1:21 PM
To: 	meteorobs@atmob.org
Subject: 	Re: (meteorobs) Leonid report - narrative - Nov 17/18, Mt. 
Lemmon, AZ (ATAJU)

Its certainly possible to see an earthgrazer if the radiant is a bit below 
the horizon, because the radiant has a finite size, it is not a point. 
Depends on how far below the horizon the center of the radiant area was. 
The Leonids are reported to have about a 5? diameter radiant, so if the 
center radiant "point" was within 2.5? below the horizon, it may be 
possible to catch a rare one coming from that extreme upper part of the 
radiant area that has already risen.

At 0535UT, the reported ZHR was around 100, which may be high enough to 
statistically allow catching such a rarity.

Mike Linnolt

--- Skywayinc@aol.com wrote:
> In a message dated 11/25/01 3:47:30 PM Eastern
> Standard Time,
> JureAtanackov@emaildot si writes:
>
>     From Skywatchers Inn, outside of Benson,
> Arizona, I saw the longest Earth
> grazer I ever saw:  at 10:35 p.m. MST on November 17
> (0535 UT on November
> 18), I witnessed a grazer that started very near the
> east-northeast horizon,
> climbed all the way up through the zenith and


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