Difference between revisions of "November 14, 2008"
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<em>image by [mailto:bart.declercq@gmail.com Bart Declercq], Haaltert, Belgium</em><br /> | <em>image by [mailto:bart.declercq@gmail.com Bart Declercq], Haaltert, Belgium</em><br /> | ||
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| − | Janssen is a peculiar crater. It is large and made up of [ | + | Janssen is a peculiar crater. It is large and made up of [[October_1,_2007|multiple craters]] so we can't easily interpret its shape and history. But with a diameter of about 200 km it is about the size of [[February_25,_2007|larger mosaic]] by Bart gives the evidence for the possibility - do you see it? The major diagnostic feature of basins is indicated by their full name: multi-ring impact basins. To the left of Janssen's rim is the arc of a low ridge, is this an outer basin rim? Unfortunately, this ridge is not detected around other sides of Janssen. So is this all that is left of a perhaps partial outer basin ring, or is it not a ring at all, but merely a random ridge? I don't know.<br /> |
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<em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | <em>[mailto:tychocrater@yahoo.com Chuck Wood]</em><br /> | ||
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<strong>Related Links</strong><br /> | <strong>Related Links</strong><br /> | ||
| − | Rükl plates [ | + | Rükl plates [https://the-moon.us/wiki/R%C3%BCkl_67 67] & [https://the-moon.us/wiki/R%C3%BCkl_68 68]<br /> |
Bart's [http://bartcentral.dommel.be/Astronomy/index.html website]<br /> | Bart's [http://bartcentral.dommel.be/Astronomy/index.html website]<br /> | ||
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Latest revision as of 18:54, 13 October 2018
A Rim?
image by Bart Declercq, Haaltert, Belgium
Janssen is a peculiar crater. It is large and made up of multiple craters so we can't easily interpret its shape and history. But with a diameter of about 200 km it is about the size of larger mosaic by Bart gives the evidence for the possibility - do you see it? The major diagnostic feature of basins is indicated by their full name: multi-ring impact basins. To the left of Janssen's rim is the arc of a low ridge, is this an outer basin rim? Unfortunately, this ridge is not detected around other sides of Janssen. So is this all that is left of a perhaps partial outer basin ring, or is it not a ring at all, but merely a random ridge? I don't know.
Chuck Wood
Technical Details
Sept 19, 2008, 2h50m UT. C9.25 @ F/20 + DMK31AF @ 30 fps + Astronomik red filter
Related Links
Rükl plates 67 & 68
Bart's website
Yesterday's LPOD: Snapshot Map
Tomorrow's LPOD: Indian Close-Up
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