Direct measurement of the size of 2003 UB313

@inproceedings{Brown2005DirectMO,
  title={Direct measurement of the size of 2003 UB313},
  author={M. Brown and E. Schaller and H. Roe and D. Rabinowitz and C. Trujillo},
  year={2005}
}
We have used the Hubble Space Telescope to directly measure the angular size of the large Kuiper Belt object 2003 UB313. By carefully calibrating the point-spread function of a nearby field star, we measure the size of 2003 UB313 to be 34.3 ± 1.4 mas, corresponding to a diameter of 2400 ± 100 km or a size ~5% larger than Pluto. The V-band geometric albedo of 2003 UB313 is 86% ± 7%. The extremely high albedo is consistent with the frosty methane spectrum, the lack of red coloring, and the lack… Expand

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