THE LATTICE OF STRETCH LINES ON 67P
For those readers who are familiar with the so-called red triangle, here’s another version showing which lines in the above lattice correspond to the red triangle. It also includes the four coloured body matches/anchors that match to the head rim (Part 24).
Brown- Paleo rotation plane (Part 26).
Yellow- missing Anubis slab (Part 23). The lattice would presumably have spread symmetrically across the missing surface to the right.
Green- the silhouette of Apis on the horizon is the straight line just above the green line. Apis is bisected by the paleo rotation plane. It straddled the paleo plane because it constituted the flattened tip of the symmetrically stretched diamond shape.
There are possibly several additional lines crossing the red lines we see above, which would make it a more defined diamond lattice. These lines are less obvious and are left out of the header annotation so that just the most obvious ones are shown. They are easier to see in the shape model version but are still left out.
If you can visualise the diamond lattice with the additional lines, you can see that each individual diamond cell is longer in one dimension i.e. across one diagonal. Those long diagonals are all aligned parallel to the paleo rotation plane as you’d expect if the comet had stretched along the paleo plane line. Each mini diamond has roughly the same stretch proportions as the stretched body lobe diamond, which is interesting. That wouldn’t be something that’s easy to predict but it makes sense in retrospect.
The lattice area depicted is the area of greatest stretch, especially the red triangle that straddles the paleo rotation plane (Part 26). The triangle is long and thin due to being stretched out almost to the tip of the stretched diamond shape. However, there are other areas nearby that show similar stretch vector signatures that are orientated at a slightly different angle from this lattice. They appear to follow subtly different tensile force vectors. They will be posted presently.
The reasoning for the red triangle arising as a result of tensile force vectors (or stretch vectors) has been documented in the sub series (Parts 22-28) especially in Part 26. This process will be revisited soon in order to firm up the evidence for the lattice in this header photo being due to stretch.
Copyright ESA/Rosetta/NAVCAM – CC BY-SA IGO 3.0
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All dotted annotations by scute1133.