by David North
First, I noticed a rille running southeast off Geminus (Rukl 16). Though it is drawn in Rukl, it is unnamed and does not show up in the Times Atlas. Very pronounced, and probably part of some "event" -- there is another parallel rille nearby (though more faint) and similar rilles running through Messala (not shown on any map I have either).
There is a named rille of similar orientation in Cleomedes (Rukl 26) but I couldn't find hide nor hair of it tonight. None of these rilles points toward any obvious source... and the orientation is not obviously related to Crisium.
Speaking of which, just east of Yerkes (Rukl 26) at about 15N/50E I spotted what looked very much like a small dome (no central crater seen, but it was too smooth to be a mountain). There is nothing charted there, but it was a clean observation; whether it's geologically a dome is in question, but it certainly had all the appearance.
Also notable were the impact craterings from Langrenus (Rukl 49). The more obvious cluster of secondaries to the west (and slightly north -- see Rukl 48) really stood out well, but there was also a surprising spray of elongated gouges to the southeast, also shown in part on R48. These go quite a distance and are unlike anything else I've observed. Fascinating!
Tech talk: C8/300x