presents

D'ALEMBERT
Farside Directory - Ridge Section 087


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                                    Left.  Ridge Section 087; Right: Cropped 1200 dpi USGS color chart of Section 087                                            

Larger version of region
USGS Chart 4050N-160180
Lunascan Quad of Sections 087, 088, 097, 098
LRO  Wide Angle Camera 18 in pdf
LRO WAC 32 in pdf


BRIEF DESCRIPTION
50.8_N_163.9_E
D'Alembert, the dominant feature at the top of our image, is a very large (248 km) impact crater located in the northern hemisphere on the lunar Far Side. On its SW rim is the crater Slipher. To the north is the crater Yamamoto (out of frame), and to the south-southwest is Langevin.  To the SE are the craters Chandler and Chandler P. The walled plain of D'Alembert has the same diameter as Clavius on the near side, making it one of the largest such formations on the Moon. As with many lunar walled plains of comparable dimensions, the outer rim of this formation has been worn and battered by subsequent impacts. Besides Slipher, the most notable of these craters is D'Alembert Z intruding into the northern rim (out of frame). The interior floor of D'Alembert is a relatively level surface, at least in comparison with the rough terrain that surrounds the crater rim. It is marked with a number of small crater impacts, the largest being D'Alembert G and D'Alembert E toward the eastern rim. In the southwest, the floor is more irregular due to the outer rampart and layers of ejecta from Slipher. A pair of shallow clefts in the floor surface radiate away from this crater, beginning near the midpoint of D'Alembert and reaching half-way toward the inner wall. (Credit: Some of the information used in the section feature descriptions was obtained from wikipedia.org. Section 087 and this directory was created by Fran Ridge and Ned Haskin of The Lunascan Project).

             USEFUL TOOLS:

Lunar Farside Chart [300 dpi] (NASA/LPI)
Farside Image Composite [1600 dpi] (NASA/LRO)
Farside-contour-map-gray2800.jpg
astrosurf.com/lunascan/LAC_maps.htm (Bob Garfinkle) *
planetarynames.wr.usgs.gov/Page/Moon1to1MAtlas

CRATERS:
Chandler, 85 km
D'Alembert, 248 km
Langevin, 58 km
Slipher, 69 km

LUNAR ORBITER IMAGES:
Lunar & Planetary Institute:
http://www.lpi.usra.edu/resources/lunar_orbiter/ (Atlas)
http://www.lpi.usra.edu/resources/lunarorbiter/ (Photo Gallery)
lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?D%27alembert|0
lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?chandler|0
lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?langevin|0
lpi.usra.edu/resources/lunar_orbiter/bin/srch_nam.shtml?slipher|0

APOLLO IMAGES:
http://www.lpi.usra.edu/resources/apollo/ (Apollo Image Atlas)
None listed

CLEMENTINE IMAGES:
Possible.

LUNAR RECONNAISANCE ORBITER IMAGES:
http://lro.gsfc.nasa.gov/
http://wms.lroc.asu.edu/lroc_browse/
planetarynames.wr.usgs.gov/Feature/1694?__fsk=457749366 (D'Alembert)

YOU TUBE FLYOVERS:
No videos found.

RESEARCH UPDATES:
the-moon.wikispaces.com/D%27Alembert
the-moon.wikispaces.com/Chandler
the-moon.wikispaces.com/Langevin
sservi.nasa.gov/articles/slipher-crater-fractured-moon-in-3-d/