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Table 1
History of shape models of Phobos.
| Shape model of Phobos | Reference | Image data used to |
|---|---|---|
| obtained the shape model | ||
| Control point network | Thomas et al. (1974) | Mariner 9 high resolution picture |
| Triaxial ellipsoid | Duxbury & Veverka (1977) | Viking imaging data |
| Control point network | Duxbury (1989) | Mariner 9 and Viking imaging data |
| Spherical harmonic coefficients (degree 8) | Duxbury (1991) | Viking imaging data |
| Vertices and facets | Gaskell (2011) | Viking Orbiter 1 VIS-A and VIS-B camera images and Phobos 2 VSK images |
| Spherical harmonic coefficients (degree 17) | Willner et al. (2010) | SRC (Super Resolution Channel) of the HRSC (High Resolution Stereo Camera) of the MEX mission |
| Spherical harmonic coefficients (degree 45) | Willner et al. (2014) | High Resolution Stereo Camera images of the MEX mission and Viking Orbiter images. |
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