After Greg did the last observations from the southern hemisphere mid-February, the northern hemisphere observers recovered the KH-11 CRYSTAL ('Keyhole') optical reconnaissance satellite USA 186
(2015-042A) late March. Alberto Rango captured it on March 30
from Italy and several observers have followed since. I observed it
on April 6 in early twilight. Below is one of the images, showing it passing west of Castor and Pollux in a still blue twilight sky:
The current elements are here
. USA 186 is currently moving in a 269 x 467 km orbit.
Next is the hunt for USA 245, the other West (evening) plane KH-11 that should emerge out of its winter shadow blackout by now. The East plane KH's, USA 161 and USA 224 will not be recoverable until early summer.
Labels: CRYSTAL, Keyhole, KH-11, USA 186