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| Titel |
High-Resolution Enceladus Atlas and Compositional Maps derived from Cassini ISS and VIMS |
| VerfasserIn |
Thomas Roatsch, Elke Kersten, Marita Wählisch, Angelika Hoffmeister, Katrin Stephan, Ralf Jaumann  |
| Konferenz |
EGU General Assembly 2010
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| Medientyp |
Artikel
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| Sprache |
Englisch
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| Digitales Dokument |
PDF |
| Erschienen |
In: GRA - Volume 12 (2010) |
| Datensatznummer |
250034090
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| Zusammenfassung |
| The first version of the high-resolution Enceladus atlas was released in 2006 [1]. The Cassini
Imaging Science Sub-system (ISS) acquired more high-resolution images (< 1 km/pixel)
during five close flybys of Enceladus in 2008 and 2009. We combined these images with
lower-resolution coverage taken between 2007 and 2009 to improve the high-resolution
global mosaic of Enceladus. The whole mosaic was shifted by 3.5Ë to the West to be
consistent with the IAU definition of the prime meridian location. This new global mosaic
is the baseline for the second release of the high-resolution Enceladus atlas that
consists again of 15 tiles mapped at a scale of 1:500,000. We proposed 29 additional
names for features which will be used as nomenclature in the atlas. We are awaiting
validation of the new nomenclature by the IAU. The new release of the atlas will
be made available to the public through CICLOPS (http://ciclops.org) and PDS
(http://pds.jpl.nasa.gov).
The Cassini Visual and Infrared Imaging Spectrometer (VIMS) observed Enceladus
during a couple of flybys between 2005 and 2009. This gave us the possibility to combine
these data into a global VIMS mosaic. Based on this mosaic maps of Enceladus’ spectral
properties could be derived. Thus, global maps illustrating the spatial variations of the
absorption band depth of water ice were calculated, which are indicative of varying sizes of
the water ice particles [2].
The authors gratefully acknowledge the planning and operation work of their colleagues
from the Cassini-ISS team lead by Carolyn Porco and from the Cassini-VIMS team lead by
Robert Brown.
[1] Roatsch, Th. et al., High-resolution Enceladus atlas derived from Cassini-ISS images.
Planetary Space Sciences 56, 109–116, 2008.
[2] Jaumann, R., Stephan, K., Hansen, G.B., Clark, R.N., Buratti, B.J., Brown, R.H.,
Baines, K.H., Newman, S.F., Bellucci, G., Filacchione, G., Coradini, A., Cruikshank, D.P.,
Griffith, C.A., Hibbitts, C.A., McCord, T.B., Nelson, R.M., Nicholson, P.D., Sotin, C., and
Wagner, R., 2008: Distribution of icy particles across Enceladus’ surface as derived from
Cassini-VIMS measurements. Icarus 193. |
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