Comment on the recent Hubble Space Telescope size measurement of 2003 UB313

http://www.spaceref.com/news/viewpr.nl.html?pid=19596

"We are impressed by the direct Hubble Space Telescope size measurement of
Xena by Mike Brown and his team (Brown et al. in press). Measuring the size of
such a tiny and moving object is a very difficult task. We were pleased to learn
that our claim that 2003 UB313 is larger than Pluto, was confirmed.

However, we were surprised by the smaller diameter implied by the new
measurements and the implied high albedo (reflectivity). Although an albedo of
90% has never been observed for Kuiper Belt Objects (which typically show
10-20%), it is not totally implausible, as Brown et al. suggest in their article."