Just took a look to the space-track website and saw that we have now the RCS data for all the cubesats (or still Objects).
37850 OBJECT B 2011-061B US 2011-10-28 1.698 * RCS too large for a 1U 37851 OBJECT C 2011-061C US 2011-10-28 0.1364 37852 OBJECT D 2011-061D US 2011-10-28 0.183 37853 OBJECT E 2011-061E US 2011-10-28 0.103 37854 OBJECT F 2011-061F US 2011-10-28 0.047 37855 OBJECT G 2011-061G US 2011-10-28 0.055
You know, the Radar cross section (RCS) is a measure of how detectable an object is with a radar. As a rule, the larger an object, the stronger its Radar reflection and thus the greater its RCS. So Object B can not be a cubesat!
From a logical point of view the cubesats should be clustered as they were deployed (at least for the first days).
Due to the similiar masses of 1kg they should fly very close together. Maybe NORAD is tracking only two of three from the first cluster?
RAX-2 is not in the middle of the other clusters – but due to the higher mass/size (3U) RAX-2 is drifting slower.
DICE are 1 1/2 U cubes – matching with the RCS.
So we could say now C/D are the DICE sats, E is RAX-2 and F/G/x are the 1U’s. That would also explain why I can hear AubieSat and MCubed very well if I track to E1P (antenna direction).