https://www2.lpod.org/index.php?title=October_22,_2018&feed=atom&action=historyOctober 22, 2018 - Revision history2024-03-29T02:31:35ZRevision history for this page on the wikiMediaWiki 1.31.1https://www2.lpod.org/index.php?title=October_22,_2018&diff=43859&oldid=prevApi at 15:35, 28 October 20182018-10-28T15:35:50Z<p></p>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><em>[mailto:anthony@perseus.gr Anthony Ayiomamitis]</em><br /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><em>[mailto:anthony@perseus.gr Anthony Ayiomamitis]</em><br /></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br /></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div><strong>NOTE:</strong> I was astonished to receive two submissions showing difference images from in and out of a penumbral eclipse. Yesterday's [http://lpod.<del class="diffchange diffchange-inline">wikispaces.com</del>/<del class="diffchange diffchange-inline">August+7%2C+2009 </del>LPOD] was the other image. If you stretch Anthony's Diff image it looks very much like Filipe's.<br /></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div><strong>NOTE:</strong> I was astonished to receive two submissions showing difference images from in and out of a penumbral eclipse. Yesterday's [http://<ins class="diffchange diffchange-inline">www2.</ins>lpod.<ins class="diffchange diffchange-inline">org/wiki</ins>/<ins class="diffchange diffchange-inline">August_7,_2009 </ins>LPOD] was the other image. If you stretch Anthony's Diff image it looks very much like Filipe's.<br /></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Chuck Wood<br /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>Chuck Wood<br /></div></td></tr>
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</table>Apihttps://www2.lpod.org/index.php?title=October_22,_2018&diff=43098&oldid=prevRegan at 03:59, 28 October 20182018-10-28T03:59:48Z<p></p>
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<td colspan="2" style="background-color: #fff; color: #222; text-align: center;">Revision as of 03:59, 28 October 2018</td>
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<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>More about this image at Anthony's [http://www.perseus.gr/Astro-Eclipses-2009-08-06.htm website]<br /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div>More about this image at Anthony's [http://www.perseus.gr/Astro-Eclipses-2009-08-06.htm website]<br /></div></td></tr>
<tr><td class='diff-marker'>−</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #ffe49c; vertical-align: top; white-space: pre-wrap;"><div>See <del class="diffchange diffchange-inline">[http://lpod.wikispaces.com/message/list/August+7%2C+2009 </del>Comments<del class="diffchange diffchange-inline">] </del>for yesterday's LPOD for interpretations of the cause of the detail shown in the difference image. <br /></div></td><td class='diff-marker'>+</td><td style="color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #a3d3ff; vertical-align: top; white-space: pre-wrap;"><div>See Comments for yesterday's LPOD for interpretations of the cause of the detail shown in the difference image. <br /></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br /></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><br /></div></td></tr>
<tr><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p><b>Yesterday's LPOD:</b> [[October 21, 2018|Partial Magic]] </p></div></td><td class='diff-marker'> </td><td style="background-color: #f8f9fa; color: #222; font-size: 88%; border-style: solid; border-width: 1px 1px 1px 4px; border-radius: 0.33em; border-color: #eaecf0; vertical-align: top; white-space: pre-wrap;"><div><p><b>Yesterday's LPOD:</b> [[October 21, 2018|Partial Magic]] </p></div></td></tr>
</table>Reganhttps://www2.lpod.org/index.php?title=October_22,_2018&diff=43059&oldid=prevApi: Created page with "__NOTOC__ =Partial Part 2= Originally published August 8, 2009 <!-- Start of content --> <!-- ws:start:WikiTextHeadingRule:2:<h1> --> <!-- ws:start:WikiTextLocalIma..."2018-10-22T08:04:48Z<p>Created page with "__NOTOC__ =Partial Part 2= Originally published August 8, 2009 <!-- Start of content --> <!-- ws:start:WikiTextHeadingRule:2:<h1> --> <!-- ws:start:WikiTextLocalIma..."</p>
<p><b>New page</b></p><div>__NOTOC__<br />
=Partial Part 2=<br />
Originally published August 8, 2009<br />
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<em>image by [mailto:anthony@perseus.gr Anthony Ayiomamitis], Athens, Greece (37.9889° N, 23.7306° E)</em><br /><br />
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Partial penumbral eclipses are generally ignored since they are considered as ho-hum due to the virtually undetectable difference in brightness caused by Earth's penumbral shadow. However, something which may not be perceivable by the eye can often be a trivial case for a (sensitive) camera and which takes a no prisoners approach. Here is an image comprised of August 6's full Moon just before its entry into the penumbra (&quot;Pre-P1&quot;), the full Moon at its maximum penumbral position (&quot;Max&quot;) as well as a third image of the full Moon comprised of the difference (ie. &quot;Diff&quot;). The latter is really the change in the Moon's brightness owing to its entry into the penumbra and, as you can see, this particular eclipse was comprised of a partial entry into the penumbra by a portion of the Moon's southern hemisphere. In order not to bias this analysis in any way, the camera was set to RAW mode so that the images written to the memory card would be untouched by the camera's on-board software (typical of images saved in JPG format). Also, exposure settings such as sensitivity (ISO), exposure length, white balance etc were kept identical for the image at &quot;P1&quot; and &quot;Max&quot;. My &quot;Pre-C1&quot; image was taken four minutes prior to the predicted first contact of the moon with the penumbra. I do not know if it would have been better to capture this baseline image much earlier (ex. an hour) as a precautionary measure.<br /><br />
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<em>[mailto:anthony@perseus.gr Anthony Ayiomamitis]</em><br /><br />
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<strong>NOTE:</strong> I was astonished to receive two submissions showing difference images from in and out of a penumbral eclipse. Yesterday's [http://lpod.wikispaces.com/August+7%2C+2009 LPOD] was the other image. If you stretch Anthony's Diff image it looks very much like Filipe's.<br /><br />
Chuck Wood<br /><br />
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<strong>Technical Details</strong><br /><br />
Aug 06, 2009 @ 02:00:00 UT+3/03:40:00 UT+3. Takahashi FSQ 106/f5, AP 2x Conv Barlow, Canon EOS 5D Mark I, Baader UV/IR-Cut Filter<br /><br />
Exposure: 2 x 1/160 sec, ISO 100, RAW Image Format, 4368x2912 image size, Manual Mode, Servo Mode<br /><br />
<br /><br />
<strong>Related Links</strong><br /><br />
More about this image at Anthony's [http://www.perseus.gr/Astro-Eclipses-2009-08-06.htm website]<br /><br />
See [http://lpod.wikispaces.com/message/list/August+7%2C+2009 Comments] for yesterday's LPOD for interpretations of the cause of the detail shown in the difference image. <br /><br />
<br /><br />
<p><b>Yesterday's LPOD:</b> [[October 21, 2018|Partial Magic]] </p><br />
<p><b>Tomorrow's LPOD:</b> [[October 23, 2018|Sideways Ejecta?]] </p><br />
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