Optics: Celestron C8-Newtonian reflector telescope, plossl 20mm, 2x Barlow
Mount: CG5 (EQ5)
Device: Sony HDR CX105
Filter: No
Date: 15/02/2011
Location: Baia Mare, Romania
Processing: video capture
Letronne (119 km), is a remnant of a lava flooded crater. Northern part of the crater is completely missing, and it opens in Oceanus Procellarum, forming a bay along the southwest coast. This formation is located northwest of the crater Gassendi. Southwest is flooded crater Billy, and north-north-west lies Flamsteed.
Billy (46 km), is a lunar crater at the south edge of Oceanus Procellarum. It is located southeast of similar-sized crater Hansteen (45 km), and south-west of Letronne.
Billy's interior has been flooded by basaltic lava, leaving a dark area due to low albedo. Remaining above the surface edge is narrow and low, with a thin inner wall.
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