[Neocp_artsats] A11d6Ft, A11d6Fu related, unidentified artsats

[Bill Gray]

    Well,  this is an odd pair :

https://www.projectpluto.com/neocp2/mpecs/A11d6Ft.htm
https://www.projectpluto.com/neocp2/mpecs/A11d6Fu.htm

    They're in very similar orbits,  about 1.3 degrees apart.  They have 
H=29.6 and H=30.8;  I don't know if that reflects a real difference in 
size.  The orbital periods of about 1.75 day are unusually high for 
ETBOs,  and I don't recall ever seeing those in pairs.  I'm sure they 
sometimes form as pairs,  but you wouldn't have to wait long for them to 
drift apart.

    I can't match either to any known objects.  At this point,  I'd say 
that both await survey recovery,  which may or may not happen.  I don't 
have anywhere near enough data to generate reliable TLEs for them,  so 
they may reappear on NEOCP.

-- Bill