[X] My Assistant

[Phil Stooke]

Having a bit of time free I have embarked on a new global photomosaic map of asteroid 25143 Itokawa. Follow its construction here as I go. I'm hoping it won't take more than 4 to 6 weeks as other duties call. The mosaic will eventually go into PDS.

This follows the work I did on a map made from rendered images derived from Bob Gaskell's shape model. That had to be the first step because the control I'm using is derived from published lat-long grids superimposed on his rendered images. Now each individual image will be reprojected to fit that map. The large local relief will make it impossible to make all seams invisible, however.

First step: the north polar area. The outer edge is at 40 N, with 90 N at the middle and 0 longitude at the top.

Phil

[elakdawalla]

Yaaaay Phil! I can't wait to see this come together. After I assembled Chuck Clark's cut-and-assemble model, I tried to identify the named features on it but made almost no headway at all; it was too hard to figure out what was being named on the photo map, even using the stuff from the USGS nomenclature page and map. I hope it'll be easier to figure things out with your maps. The large smooth area on this image is Sagamihara regio, right?

[chuckclark]

Yaaaay Phil! I can't wait to see this come together. After I assembled Chuck Clark's cut-and-assemble model, I tried to identify the named features on it but made almost no headway at all; it was too hard to figure out what was being named on the photo map, even using the stuff from the USGS nomenclature page and map. I hope it'll be easier to figure things out with your maps. The large smooth area on this image is Sagamihara regio, right?

Here is Phil's first cylindrical map with the USGS features named (craters are marked with a triangle; regios are just generally labeled for the moment because drawing their boundaries is iffy from the pictures.

But there appears to be a discrepancy in the nomenclature lat/longs for Miyabaru. USGS lists it at -40;244, which puts it in the southern hemisphere, and roughly along the short axis. But by the picture Emily links to (and also the 2009 Icarus article Figure 4) Miyabaru is definitely on the so-called head, and in the northern hemisphere. So on the map I've placed it at a depression at roughly +10 lat; 13 long.

Phil, I'll post the rock location discrepancies here shortly. Patience.

Oh, and there's more, now that I double check the regio lat/longs list. I placed these based on the pics, not the lat/longs in USGS. Arcoona is way off. It's the tail end of the otter (and I have a plastic model, so easy to locate it by eye); it can't possibly be where USGS says it is (+28; 202).
The listing for LINEAR regio is at best at the extreme southern edge based on the pics.
The listing for Ohsumi regio is at best at the extreme northwestern edge based on the pics.
The listing for Yoshinobu regio appears to be way way off. By the pics, Yoshinobu is the humpback on the neck, i.e. northern hemisphere around the zero longitude. USGS's point is on the belly.
The listing for Uchinoura regio synchronizes with the pics.
MUSES-C and Sagamihara are so extensive the listed centerpoints are not much help in defining the regions.

I wonder if I'm misreading or misunderstanding the USGS nomenclature chart, but then, the small features (craters) all plot out on target with my plastic model and Phil's map.

So, Emily, perhaps it's no wonder you couldn't make much headway.

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