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Fig. 3
Our best estimate (solid red line) of the dust envelope superimposed on the 29 Jan. 2010 HST image, along with three other plausible envelopes (dotted lines in blue, green, and magenta). The isophotal contours (black) are in rough agreement with the envelopes. The envelopes fit equally well on our Gemini image (Fig. 1).
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