Table 2
Measured values of the Phobos 
and 
normalized gravity coefficients from the MEX two-way Doppler data acquired during the 2010 and 2013 flybys and the corresponding gravity coefficients for a homogeneous Phobos.
| Items |  |
 |
 |
 |
Ref. |
|---|---|---|---|---|---|
| 2010 flyby only | –0.0316 | 0.0401 | 0.0024 | 0.0053 | (Pätzold et al. 2014) |
| 2010 flyby only | –0.0537 | 0.0830 | 0.0121 | 0.0430 | Yang, priv. comm. |
| 2013 flyby only | –0.0034 | 0.0261 | 0.0685 | 0.0396 | Yang, priv. comm. |
| Combined 2010 and 2013 flybys | –0.0379 | 0.0096 | 0.0159 | 0.0147 | Yang et al. (2019) |
| Homogeneous case | –0.02925 | 4.4377e-5 | 0.01576 | 3.52194e-5 | Present study (see also Yang et al. 2019) |
Notes. The normalized harmonic coefficients are computed with respect to a reference radius of 14 km. The error bars for the homogeneous Phobos were computed by propagating the error bars on the shape harmonic coefficients from Willner et al. (2014) into the polyhedral model.
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