Carpenter

Lat: 69.4°N, Long: 50.9°W, Diam: 59 km, Depth: 4.17 km, Rükl: 2, Eratostenian

Images

Depth data from Kurt Fisher database
- Westfall, 2000: 4.17 km
- Viscardy, 1985: 2.6 km
- Cherrington, 1969: 3.1 km
Based on the shadows in LO-IV-176H, LTVT estimates an eastern rim height of up to 4,800 m. - JimMosher
Measures on LRO QuickMap give depth about 4.2 km
Central peak height
- Based on the shadows in LO-IV-176H, LTVT estimates central peak heights of 650-800 (western peak) and 980 m (eastern peak). - JimMosher
Measures on LRO QuickMap give max central peak height about 1 km
- Sekiguchi, 1972: 1.0 km "A large mountain block on which several peaks are perceived"
  - 0.5 km "According to photographs of the Lunar Orbiter IV, there is another small mountain behind [the central peak] which is not visible from the earth." - fatastronomer
Included in ALPO list of bright ray craters
Stratigraphy changed from Copernican to Eratostenian based on Galileo data and crater counts (McEwen et al, 1993)
TSI = 35, CPI = 25, FI = 20; MI =80 Smith and Sanchez, 1973
90-98% anorthosite in central peak, and 0.2 to 0.4 Maturity Index (not mature) Ohtake and others, 2009

The name of this crater honors two men:
- James Carpenter (1840-1899), a British astronomer
- Edwin Francis Carpenter (1898-1963), an American astronomer.
According to Mary Blagg's Collated List (1913), this crater was known to her three authorities as Anaximander b (catalog number 1692). The modern name that was adopted by the IAU in its original Named Lunar Formations (1935 -- apparently honoring James Carpenter), was introduced on a lunar map published by Gaudibert and Fenet in 1887 (Whitaker, p. 150). - JimMosher
E. F. Carpenter was added as a second honoree in 1985 (IAU Transactions XIXB). (He was professor of Astronomy at Univ of Az when I became an undergraduate there - he allowed me to use the small telescopes for observing!) - tychocrater Sep 13, 2009
Maybe we could add Malcolm Scott Carpenter too (1925-2013); American test pilot, astronaut, and aquanaut. Second American in orbit around earth, after John Glenn. - DannyCaes Oct 25, 2014