The WISE result is based on the updated albedo distribution found in that
survey, while JPL is using a simple H to D conversion. The 911 is an
estimate with an errorbar of around 10-20 objects (from the top of my head)
based on our best projections.

Cheers
Tommy

On Sep 29, 2011, at 2:13 PM, dfischer@... wrote:

> > I thought the press conference went rather well, though they kept the
> > science content quite light. Still, it was informative and entertaining
> > (at least to me).
>
> But I've already hit a math problem with it: in
> http://www.nasa.gov/mission_pages/WISE/news/wise20110929.html - coming
> with the press conference - it says that 911 NEOs > 1 km in diameter have
> already been found, yet http://neo.jpl.nasa.gov/stats knows of only 831
> found til today. Which would be only 84% of the newly estimated population
> of 981; thus the Spaceguard goal would not have been met yet.
>
> What am I missing?