Part 61- Close-up gifs of the Bastet Pancakes Matching to Aker

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​​​Copyright ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

 ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DyASP/IDA/

Part 51 header for context. The two left-hand mauve features on Bastet and Aker (head and body respectively) are the same as the much closer-up mauve features in the “head” and “body” gif components. 
Copyright ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

INTRODUCTION

This post is a follow-on part to Part 51 ‘The Bastet Pancakes and Their Relationship to Neighbouring Slides’. That part showed how the pancakes, which are thought to be splatted cometesimals are in fact slid pieces of crust which used to to sit in the two dips at Aker. 

Part 51 showed the matches in several photos and included two gifs. One was a bit crudely dotted and they weren’t close-ups showing the multitude of subtle matches. This post shows a gif that’s a closer-up version of those two gifs. 

For the sake of absolute transparency, the nature of the Part 51 header, a NAVCAM photo, didn’t lend itself well to cropping for the gifs. Aker was the problem. It was to do with it enlarging when rotating it to horizontal and moving out of frame. So an OSIRIS picture was found which was from the same angle. However, small discrepancies in distance meant it had to be resized by about 10% to fit the NAVCAM Bastet component. Seeing as the matches had already been made on the single header photo where no resizing was needed, this seemed a reasonable course of action because we know that the matches are the same size in that photo. Any objection to this approach would have to contend with the fact that the head lobe is showing a multitude of matches that are all 90% the size of their body counterparts. 

The viewing angle issue was negligible and that’s betrayed by the fact that the matches fit in two dimensions when resized. If there was a perspective discrepancy, they would be the same length on resizing but not the same width. 

OSIRIS still used for gif:

Credits: ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DyASP/IDA/

PHOTO CREDITS

FOR NAVCAM

Copyright ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0

To view a copy of this licence please visit:

http://creativecommons.org/licenses/by-sa/3.0/igo/

FOR OSIRIS

ESA/Rosetta/MPS for OSIRIS Team MPS/UPD/LAM/IAA/SSO/INTA/UPM/DyASP/IDA/

All dotted annotations by Andrew Cooper

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