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Fig. 3


Observations of the 2010 June 3 impact location. a) HST visible and ultraviolet (225 nm); b) Gemini N/NIRI in a strong methane absorption band (2.12 μm); c) VLT/VISIR images at (i) 7.9; (ii) 8.6; (iii) 10.8; and (iv) 17.6 μm sensitive to (i) stratospheric temperatures; (ii) aerosols; (iii) stratospheric ammonia or silicates emissions, and (iv) tropospheric structure, respectively. Debris from an impactor should appear dark in visible and ultraviolet and bright in methane absorption bands and thermal emissions. Boxes and circles show the expected debris location. Neither of these observations succeeded in showing a debris field at the impact’s location, thus implying a modest size for the object.

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