| DATA_SET_DESCRIPTION |
Data Set Overview
=================
This data set contains the Peter Thomas shape models for small
solar system bodies, as well as image mosaics constructed from
these models. These shape models are based on optical data and are
distinct from the shape models based on radar observations which are
included in a separate data set, EAR-A-5-DDR-RADARSHAPE-MODELS-V1.0.
The current version of this data set contains the following.
243 Ida: Shape model, image mosaic, and a list of Galileo
SSI images used to construct the image mosaic
951 Gaspra: Shape model, image mosaic, and a list of Galileo
SSI images used to construct the image mosaic
253 Mathilde: Shape model and a list of NEAR MSI images used to
produce the shape model.
4 Vesta: Shape model and a list of HST images used to produce
the shape model.
M1 Phobos: Shape model and image mosaic
M2 Deimos: Shape model and image mosaic
S7 Hyperion: Shape model and image mosaic
S10 Janus: Shape model (image mosaic not yet completed)
S11 Epimetheus: Shape model (image mosaic not yet completed)
Parameters
==========
The shape models consist of a grid of body-centered latitude and
longitude with a diameter listed for each grid point. Details of
mapping and production of each model are given in the PDS label
for the shape model file, and further details are given in the
relevant published papers.
Davies, M.E., V.K. Abalakin, A. Brahic, M. Bursa, B.H. Chovitz,
J.H. Lieske, P.K. Seidelmann, A.T. Sinclair, and I.S. Tiuflin 1992.
Report of the IAU/IAG/COSPAR Working Group on Cartographic
Coordinates and Rotational Elements of the Planets and Satellites
- 1991. Celestial Mechanics and Dynamical Astronomy, 53, no. 4,
377-397. [DAVIESETAL1992]
Simonelli, D.P., P.C. Thomas, B.T. Carcich, and J. Veverka 1993.
Generation and use of numerical shape models for irregular solar
system objects. Icarus, 103, 49-61. [SIMONELLIETAL1993]
Thomas, P.C. 1993. Gravity, tides, and topography on small
satellites and asteroids. Icarus 105, 326-344. [THOMAS1993]
Duxbury, T.C., and J.D. Callahan 1989. Phobos and Deimos control
networks. Icarus 77, 275-286. [DUXBURY&CALLAHAN1989]
Duxbury, T.C., J.D. Callahan, and A.C. Ocampo 1984. Phobos: Close
encounter imaging from the Viking Orbiters. NASA reference
publication 1109. [DUXBURYETAL1984]
Davies, M.E., T.R. Colvin, M.J.S. Belton, J. Veverka, and P. Thomas
1994. The direction of the north pole and the control network of
asteroid 951 Gaspra. Icarus 107, 18-22. [DAVIESETAL1994A]
Davies, M.E., T.R. Colvin, M.J.S. Belton, J. Veverka, and P. Thomas
1996. The direction of the north pole and the control network of
asteroid 243 Ida. Icarus 120, 33-37. [DAVIESETAL1996]
Thomas, P.C., J. Veverka, D. Simonelli, P. Helfenstein, B. Carcich,
M.J.S. Belton, M.E. Davies, and C. Chapman 1994. The shape of
Gaspra. Icarus 107, 25-36. [THOMASETAL1994]
Thomas, P.C., M.J.S. Belton, B. Carcich, C. R. Chapman, M.E.
Davies, R. Sullivan, and J. Veverka 1996. The shape of Ida.
Icarus 120, 20-32. [THOMASETAL1996]
Thomas, P.C., G.J. Black, and P.D. Nicholson 1995. Hyperion:
Rotation, shape, and geology from Voyager images. Icarus 117,
128-148. [THOMASETAL1995]
Yoder, C.F., S.P. Synnott, and H. Salo 1989. Orbits and masses of
Saturn's co-orbiting satellites Janus and Epimetheus. Astron. J.
98, 1875-1889. [YODERETAL1989]
Thomas, P. 1989. The shapes of small satellites. Icarus 77,
248-274. [THOMAS1989]
Thomas, P.C., R.P. Binzel, M.J. Gaffey, B.H. Zellner,
A.D. Storrs, and E. Wells 1997. Vesta: Spin pole, size, and
shape from HST images. Icarus 128, 88-94. [THOMASETAL1997]
Thomas, P.C., J. Veverka, J.F. Bell III, B.E. Clark, B. Carcich,
J. Joseph, M. Robinson, L.A. McFadden, M.C. Malin, C.R. Chapman,
W. Merline, and S. Murchie 1999. Mathilde: Size, shape, and
geology. Icarus 140, 17-27. [THOMASETAL1999]
Update History
==============
This data set was first reviewed and archived in 1997. It is now
being updated to include two new shape models which have become
available, those of the asteroids 253 Mathilde and 4 Vesta.
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