Hitchhiker's Guide to Rukl Chart 28

Hevelius (JRF <freeman _at_ netcom.com>)

Walled plain with some rilles on the floor.

Rilles south of Hevelius (Robin Casady)

At the southern tip of Hevelius there was an interesting rille showing. It consisted of two arcs and looked like archery bow or a child's drawing of a bird in flight. An other rille at right angles to it seemed to add a tail, giving it the impression of a flying serpent. Rukl shows some unidentified rilles in the area (split between 28 & 39) but they don't have the double arc pattern that I saw.

<d _at_ timocharis.com> David North adds:
Given that it wasn't Rima Hevelius I or II (both extend to the south from Hevelius; I to the east and II to the west -- but both as straight lines) there is an arcing feature to the east of Lohrmann that seems to be a rille or something like it, the easternmost part of which is catenoid (and would probably be the most easily seen of all the listed features). It's big enough to almost be a valley, and the craters making up the eastern portion should be pretty visible. I have no idea why this would remain unnamed, save that it is not clearly either a rille or a valley, and may have confused those concerned with nomenclature.

Cardanus (David North <d _at_ timocharis.com>)

See discussion under Krafft on chart 17.

Galileo (David North <d _at_ timocharis.com>)

Galileo's namesake showed very well tonight. I hope to make this the most observed little crater on the moon... he deserves better than that little pokey thang.

Reiner Gamma (...Akkana)

A bit in from Galileo and its companion crater Galileo A swam a feature that looked remarkably like a fish (or a trilobite). This turned out to be Reiner Gamma, which Rukl describes as an "entirely flat feature formed of bright material".
The origin of Reiner Gamma is unclear. At a speech at the Riverside Telescope Maker's Conference, Astronaut Gene Cernan (the last man to set foot on the moon, and the only geologist to go there) observed that Reiner Gamma and several similar unusual albedo features sit approximately opposite unusually high mass concentrations. Interesting ...