Other
Scientific paper
Apr 2010
adsabs.harvard.edu/cgi-bin/nph-data_query?bibcode=2010ttt..work...26b&link_type=abstract
Through Time; A Workshop On Titan's Past, Present and Future, NASA Goddard Space Flight Center, April 6th - 8th, 2010. Edited b
Other
Scientific paper
Senkyo is an equatorial plain filled with dunes and surrounded by ‘hummocky' plateaus. During T61, the Visual and Infrared Mapping Spectrometer (VIMS) observed a circular feature that cross-cuts the dune fields and a bright plateau. It is located at (5.4 N, 17.9 E). This circular feature is about 100 km in diameter and exhibits a central bright area which can be interpreted as the central peak of an impact crater. Although there is only a handful of impact craters on Titan, there are at least two other craters that are of similar size to the newly-discovered feature: Selk and Sinlap (Le Mouelic et al., JGRE, 113, 2008). Sinlap is associated with a large downwind, plume-like feature that may have been formed from an impact plume that rapidly expanded and deposited icy particles onto the surface. Although much of the surrounding region is covered with dunes, the plume region is devoid of dunes. In addition, the dielectric constant inferred from polarized radiometric data and the VIMS spectra show that the Sinlap area has a high abundance of ice. The circular feature on Senkyo is quite different: there is no evidence of an ejecta blanket and the crater itself appears to be infilled with dune material. The emplacement of this crater suggests that it damaged the hummocky plateau which must be the oldest terrain. Then, the dunes formed and filled the impact crater. Based on these observations, this newly-discovered crater is older than the Sinlap crater which affected the dune-filled terrain.
Baines Kevin Hays
Barnes Joshua
Brown Harvey R.
Buratti Bonnie Jean
Clark Roger Nelson
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