Aristillus

D=55 km
Center: 34°N, 1°E

Floor Area = 381 km^2
Observed Density (@ 1km): not observed
Simone's Age: 2.2 ± 0.3
Fit Density (@ 1km): 2800 ± 360
PF fit: Good	
Stoffler epoch: Eratosthenian

Age Calculation Notes: 
Fit is pretty good as is. First and last point fall slightly off.

USGS geology: 
All mapped as Copernican crater material.

Wilhelms: 
Copernican

Floor material: 
Best guess is original.

Geology Observations: 
Ejecta blanket visible, along with bright rays and secondary fields (covering Autolycus). Rim still sharp. Large central peak (excluded). Floor mostly flat, slightly hummocky. Possible collapse at 6:00 position (exlcluded). No secondaries measured, but curious about crater at 4:00 position. 

SFD Observations: 
Dominated by all classes within error - 4 dominates smallest, 2 dominates largest. Flatter distribution. Slope(Diff)=-3.7 ± 0.8

Also examined by Baldwin (1985)
density: 3300 ± 310 (likely ejecta)
age: 1.826 ± 0.236 Ga

Last Edited by MRK 1/8/2014