Lyman

D= 83 km
Center: 65°S, 163°E

Count Area: 1435 km^2
Observed Density (@ 1km): 4900 ± 1900
Age: 3.5 ± 0.1
Stoffler epoch: Late Imbrian
Fit Density (@ 1km): 5300 ± 600
PF fit: good

Age calculation notes:
good fit (SM).
good fit - use as is; no OSs larger than resolution limit (MRK).

USGS geology: 
All mapped as Late Imbrian crater material.

Wilhelms: 
Late Imbrian

Floor material: 
Best guess is original, but does look softened. Soft?

Geology Observations: 
Ejecta blanket visible, appears somewhat eroded. Rim crest still sharp. Central peak moderate size, does not appear very eroded. Floor hummocky (very hummocky areas avoided). No secondary clusters/chains observed above 500 m. (No all+sec comparison needed.)

SFD Observations: 
Dominated by classes 3 and 4, but 1 & 2 not much lower density. Matches MPF. Steeper distribution. No shallow "right ear". Slope(Diff)=4.4 ± 0.8

Discussion notes: prototype of excellent fit

Last Edited by MRK 12/13/2012