LIMITS ON QUAOAR'S ATMOSPHERE
@article{Fraser2013LIMITSOQ, title={LIMITS ON QUAOAR'S ATMOSPHERE}, author={Wesley C. Fraser and Chadwick A. Trujillo and Andrew W. Stephens and Germ{\'a}n Gimeno and Michael E. Brown and Stephen D. J. Gwyn and J. J. Kavelaars}, journal={The Astrophysical Journal}, year={2013}, volume={774} }
Here we present high cadence photometry taken by the Acquisition Camera on Gemini South, of a close passage by the ~540 km radius Kuiper belt object, (50000) Quaoar, of a r' = 20.2 background star. Observations before and after the event show that the apparent impact parameter of the event was 0."019 ± 0."004, corresponding to a close approach of 580 ± 120 km to the center of Quaoar. No signatures of occultation by either Quaoar's limb or its potential atmosphere are detectable in the relative…
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