* Astronomy

A classified spacecraft payload, NROL-24,  is scheduled for launch on 2007 Dec 10 at 22:04 UTC (17:04 EST), from SLC-41, Cape Canaveral, aboard an United Launch Alliance Atlas V-401 rocket.
The rocket will fly  with a four-metre fairing, no solid rocket boosters and a single-engine Centaur upper stage.
Details about the payload are classified, but it is suspected that it will replace an aging SDS communications satellite:

Unknown 041211
1 90028U 04846A   07319.29116097 0.00001407  00000-0  00000-0 0    01
2 90028  64.2504 305.9703 7445669 256.2170 103.7830  2.00633719    06