O'Day

D=73 km
Center: 31°S, 158°E
Floor Area = 249 km^2

Observed Density (@ 1km): 6000 ± 5000
Simone's Age: 3.6 ± 0.1
Fit Density (@ 1km): 6500 ± 1100
PF fit: OK, but too few points
Stoffler epoch: Late Imbrian

Age Calculation Notes: 
Fit is generally OK, but there are too few data points to get a good value. Used Melosh gravity scaling.

USGS geology: 
All mapped as Copernican crater material.

Wilhelms: 
Copernican

Floor material:
Best guess is original (at least for area counted).

Geology Observations: 
Ejecta blanket visible, but no bright rays in WAC. Rim still sharp, but large superposed crater at 6:00. Largish central peak (excluded). Areas of floor are flat, but lots of hummocky areas too. Possible collapse/ejecta blanket in southwest portion (exlcluded). Few secondaries measured in SE corner (2 with D = 0.6 and 0.9). Sitting on rim of large basin. 

SFD Observations: 
Dominated by all classes within error - class 1 only at small D. Flat to steep distribution. Slope for secondaries not calculated - only two points. Slope(Diff)=4.5 ± 1.3

Last Edited by MRK 1/9/2014