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Subject: Re: [M]: OT: Lunar Query: Chasing Plato Craterlets
From: James W. Burrows
Reply To: mapug@shore.net
Date: Mon Aug 21 12:55:27 2000
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While you're here, how about checking out the
Astronomy Book
List ? |
At 09:49 2000-08-21 +0100, Alec Muffett wrote:
>If I want to go chasing craterlet counting in Plato, what's the best
>point in time to do so? Presumably the terminator should be really
>close to Plato, but does anyone have suggestions for the most
>"auspicious" positioning to track them down?
Rükl sez, p. 195, "Plato. Prominent walled plain with a dark floor ... on
which there are four craterlets about 2 km across (a test for larger
telescopes). Sunrise 0.5 day after First Quarter, sunset 0.5 day after
Last Quarter." He further says that librations can change sunrise/sets by
0.75 day. His photo, showing the craterlets, was made when co-longitude =
24° (2 days after First Quarter).
-- Jim Burrows phone 206.244.2933, fax .0294
-- http://www.halcyon.com/burrjaw/
-- Seattle N47.47233, W122.36620 (WGS84)
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