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photonovore
Moonatic
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Reged: 12/24/04
Posts: 2488
Loc: tacoma wa
Re: Gassendi and environs 16 May 2008
      05/18/08 06:02 AM

Jim, if my image was taken later, why are the shadows in it longer than those in Larry's image (waxing moon)? Also, three hours between? How could this be? I noticed major changes in the illuminated area of the peaks beyond the terminator in just 1/2 hour-- yet they appear essentially the same in both of these images--within a few minutes not hours. It seems to me that 3 hours of difference would certainly make a much more dramatic difference in comparative illumination. My image corresponds to about 18:15 NZ local for Dunedin (-7 UT for me, +12 for Larry) according to the Virtual Moon ephemeris (illumination 87.1%, colong 43, solar incl 1.5, phase 42.2). So i'd be guessing Larry's image was taken just a few minutes after that time. So Larry, what time were you imaging Gassendi? (Curious minds and all that... )

--------------------
Mardi




4" achromat, ETX-70.
Whitepeak Lunar Observatory Website

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Entire thread
Subject Posted by Posted on
* Gassendi and environs 16 May 2008 larrytOMC200 05/17/08 06:24 AM
. * Re: Gassendi and environs 16 May 2008 revans   05/18/08 05:05 AM
. * Re: Gassendi and environs 16 May 2008 larrytOMC200   05/17/08 08:40 PM
. * Re: Gassendi and environs 16 May 2008 Mare Nectaris   05/17/08 09:56 AM
. * Re: Gassendi and environs 16 May 2008 Jim Mosher   05/17/08 09:31 PM
. * Re: Gassendi and environs 16 May 2008 photonovore   05/18/08 06:02 AM
. * Re: Gassendi and environs 16 May 2008 Jim Mosher   05/18/08 11:58 AM
. * Re: Gassendi and environs 16 May 2008 photonovore   05/18/08 01:20 PM
. * Re: Gassendi and environs 16 May 2008 Mare Nectaris   05/18/08 01:35 PM
. * Re: Gassendi and environs 16 May 2008 photonovore   05/18/08 01:44 PM
. * Re: Gassendi and environs 16 May 2008 larrytOMC200   05/18/08 02:27 PM
. * Re: Gassendi and environs 16 May 2008 larrytOMC200   05/18/08 07:38 AM
. * Re: Gassendi and environs 16 May 2008 Matt Looby   05/17/08 01:14 PM
. * Re: Gassendi and environs 16 May 2008 photonovore   05/17/08 03:51 PM
. * Re: Gassendi and environs 16 May 2008 Matt Looby   05/18/08 09:12 AM
. * Re: Gassendi and environs 16 May 2008 Matt Looby   05/18/08 09:30 AM
. * Re: Gassendi and environs 16 May 2008 Jim Mosher   05/18/08 12:41 PM
. * Re: Gassendi and environs 16 May 2008 Matt Looby   05/18/08 05:58 PM
. * Re: Gassendi and environs 16 May 2008 Jim Mosher   05/19/08 09:04 PM
. * Re: Gassendi and environs 16 May 2008 Matt Looby   05/20/08 09:09 AM

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