Fig. 5

Oblique Mercator projection of the sub-Rosetta point (SRP) and sub-solar point (SSP) paths during the Lutetia encounter on 2010 July 10 by the Rosetta spacecraft. The gray area near the South pole represents surface points where the Sun is never above the local horizon at the encounter epoch (constant shadow area). The reddish shades on the surface give the local illumination conditions at closest approach (CA), with the equatorial black band corresponding to night time at CA. Brighter shades of red depict a smaller local solar incidence angle (Sun high in sky), while darker shades represent a larger solar incidence angle. For flyby imaging, crater measurements will be much better in regions of low sun (high incidence angle), while albedo/color will be better discernible at high sun. The thin blue line is the SSP path, with the Sun traversing this path east-to-west on Lutetia’s surface. The location of the SRP with time (thick, multi-colored line) is color-coded in phase angle (see Table 4 for a detailed listing of the path coordinates as a function of time). Positions of the SSP and SRP at CA are labeled for convenience. The actual estimate of the CA time is 15:44 UT, but it may vary by a few tens of seconds, depending on trajectory-correction maneuvers that are applied to the spacecraft before the encounter. Thus, we provide times relative to CA, indicated in minutes.
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