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O'Neill's Bridge (arrow) Is a nicknamed feature composed of two adjoined, small eroded crater. 2004.0B.31 16:53 LIT Age 15 days. 10-in 6'6 + 2.5X + Tollcam

Lick

Yerkes 51.7UE 14.6UN This is a pair of similar shaped flooded craters. Lick is 31 km in diameter. Yerkes is 36 km and connects to a satellite crater (Yerkes E, 10 km) through a ridge.

Dorsum Oppel 52.60 E 18.70 N

The most noticeable wrinkle ridges on the western edge of Mare Crisium, length 270 km. This dorsum, together with Dorsa Harker and Dorsa Tetyaev on the eastern edge (Image T002), form a concentric ring of mare ridges. All sizeable lava-flooded impact basins on the Moon, including Mare Crisium, are characterized by concentric mare ridges.

(Images in next page)

Cleomedes 56.00 E 27.70 N Geminus 56.70 E 34.50 N Messala 60.50 E 39.20 N

Cleomedes is a prominent crater in the north of Mare Crisium. It is 125 km in diameter, with small craters, central peaks and an elusive rille (Rima Cleomedes) on the floor. Its northern wall is somewhat eroded and interrupted by the smaller crater Tralles (43 km). On the contrary, Burckhardt (56 km) is a bigger crater that overlaps a close pair of small craters (Burckhardt E & Burckhardt F). This is an exception of the trend that small craters superposed on larger ones.

Further north of Cleomedes are two small craters Geminus C and Messala B. They appear no special near the terminator but become centers of bright rays during the full moon. Geminus itself is 85 km across, with a central peak and a wide cleft cutting on the southern rim. Messala is a fairly large walled plain with irregularities on the floor, 125 km in diameter.

Lacus Spie (Lake of Hope) 65.00 E 43.00 N A small lava plain, about 80 km across.

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1. Messala 2 MesSala B 3 Schumacher 4. MfifcUriJs 5. Zeno 6. LacJS Spei (Lafre öfHope) 2004.08.3! 17:38 UT Moonage 15days. 1CMnfi6Nebenan t 2.5X t Tollcamat 1/100 sei.

^ Cleomedes, Geminus & Messala

2005.10.19 ~16:27 UT Moon age 16 days. 10-in f/6 Newtonian + 2.5X + ToUcam (mosaic)

1. Messala 2 MesSala B 3 Schumacher 4. MfifcUriJs 5. Zeno 6. LacJS Spei (Lafre öfHope) 2004.08.3! 17:38 UT Moonage 15days. 1CMnfi6Nebenan t 2.5X t Tollcamat 1/100 sei.

Features along the edges of Mare Crisium

1. Condorcet 2, Prom. Agarum 3. Moris Usov 4. Dorsa Hariier 5, Dorsum Termier 6. Fahrenheit 7. Pi card 8. Curtis 9. Eckeri 2004.Cfi.3l 18:3a UT Age 15 days. 10-in f/6 Newtonian f 2.5X + ToUcam
1. Mare Anguis (Sejpenf Sea) 2. Eimmart 3. Dorsa Tetyaev 2Q04J08l31 18:54UT Age 15 days. 10-in ffô + 2.5X + ToUcam

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