Altitude of Umbra Shadow

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#1459

From: Howard L. Brooks
Date: Wed, 11 May 1994 21:18

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Responding to Brad Shue's question about the altitude of the umbra
shadow above the Earth, I get a rough answer around 13,000 km.

The moon was nearly at apogee, which contributed to the relatively
large size of the annulus.

I got my answer by comparing the actual distance to the Moon and
the average length of the umbra shadow (which is the average Earth-Moon
distance).

Howard Brooks
DePauw University
hlbrooks@depauw.edu

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From: "Howard L. Brooks" <HLBROOKS@DEPAUW.EDU>
Subject: Altitude of Umbra Shadow
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