NASA Logo, National Aeronautics and Space Administration
NASA Space Science Data Coordinated Archive Header



Availability: Archived at NSSDC, accessible from elsewhere

Time span: 2000-06-30 to 2011-07-20


This description was generated automatically using input from the Planetary Data System.

Data Set Overview

This shape model of Mimas is based on 771 Cassini Imaging Science Subsystem narrow angle camera (ISSNA) images taken in 2005-2011, 9 Cassini Imaging Science Subsystem wide angle camera (ISSWA) images taken in 2010, and 17 Voyager 1 Imaging Science Subsystem Narrow (ISSN) camera images taken in 1980. Coordinate system: BODY601_POLE_RA = ( 40.66 -0.036 0. ) BODY601_POLE_DEC = ( +83.52 -0.004 0. ) BODY601_PM = ( 337.46 +381.9945550 0. ) BODY601_LONG_AXIS = ( 0. ) BODY601_NUT_PREC_RA = ( 0. 0. +13.56 0. 0. 0. 0. 0. 0. ) BODY601_NUT_PREC_DEC = ( 0. 0. -1.53 0. 0. 0. 0. 0. 0. ) BODY601_NUT_PREC_PM = ( 0. 0. -13.48 0. -44.85 0. 0. 0. 0. ) (For help in interpreting the values of the SPICE assignments above, see the document 'PCK Required Reading' (PCK.REQ), available at NAIF and in the document directory of this data set.) The parameters of the model are as follows: Number of landmarks = 684 RMS position uncertainty = 144 m/dof (degree of freedom) Pointing uncertainty: .059 mrad Pointing residual: .259 mrad Number of observations: 86262 Observations per landmark: 126.1 RMS landmark location residual: 246 m/dof The models were originally prepared in the Implicitly Connected Quadrilateral (ICQ) format. Vertex-facet format versions, derived from the ICQ versions, are also provided. The filenames are and, where 512 is the value of Q (an indicator of the resolution). See below for the full definition of Q and the ICQ format. For additional information about the shape models, see Gaskell et al. (2008). The file '' is a list of the Cassini ISSNA and ISSWA and Voyager 1 ISSN images used to generate this model. These images are archived in PDS under the data set IDs CO-S-ISSNA/ISSWA-2-EDR-V1.0 (Cassini) and VG1/VG2-S-ISS-2-EDR-V2.0 (Voyager 1). A text file, 'icqmodel.asc' is provided in the 'document' directory which describes the ICQ format and the derivation of the vertex-facet versions.

Modification History

Version 1.0 of this model was archived in 2011. The model was updated with the inclusion of additional images, and archived as V2.0 in 2013.


Gaskell, R.W., O.S. Barnouin-Jha, D.J. Scheeres, A.S. Konopliv, T. Mukai, S. Abe, J. Saito, M. Ishiguro, T. Kubota, T. Hashimoto, J. Kawaguchi, M. Yoshikawa, K. Shirakawa, T. Kominato, N. Hirata, and H. Demura, Characterizing and navigating small bodies with imaging data, Meteoritics and Planetary Science, vol. 43, Issue 6, p. 1049-1061, 2008.

These data are available on-line from the Planetary Data System (PDS) at:

Alternate Names



  • Planetary Science: Small Bodies

Additional Information



Questions and comments about this data collection can be directed to: Dr. Edwin V. Bell, II



NameRoleOriginal AffiliationE-mail
Mr. Robert GaskellData ProviderPlanetary Science
Dr. Carol NeeseGeneral ContactPlanetary Science
[] NASA Logo -