Tycho

D=86 km
Center: 43¡S, 348¡E

Area: 1185 km^2
Density (@ 1km): 900 ± 900
Simone's Age: 0.7 ± 0.2
Fit density (@ 1km): 900 ± 300
PF fit: OK, large error bars, few data points 
Stoffler epoch: Copernican

Age calculation notes:
- OK, large error bars, few data points - will not use for this work - 1 km craters too big, need smaller craters to get sufficient numbers

USGS geology: 
Crater mapped as Copernican. Floor mapped as two copernican units - smooth and hummocky

Wilhelms: 
Copernican

Floor material: 
Best guess is original. One of youngest large craters on Moon.

Geology Observations: 
See ejecta, which is bright, and has rays. Little evidence of modification except a few wall collapses.

SFD Observations: 
No craters > 1.3 km. No secondaries identified. No class 1 craters identified. 2, 3, and 4 equally contribute. SFD is flat (but only two points - another reason not to included this crater. Differential slope not calculated with only two points.

Ages also reported by Baldwin (1985), Neukum & Konig (1976), and Hiesinger et al. (2012)
Baldwin: density = 600 ± 100, age = 0.138 ± 0.024 (area = 3155 km^2 - likely ejecta)
Neukum: density = 80, age = 0.1 (ejecta)
Hiesinger: 124 ± 12 Ma (ejecta)

Last Edited by MRK 1/8/2014