[Neocp_artsats] A11epLY = Cluster satellite, either Samba or Tango

[Bill Gray]

    On 16 November,  ATLAS got two tracklets on this object.  Those were 
identified as artificial before they got to NEOCP.  A11epLY was not so 
identified and has slipped on to NEOCP.  All three tracklets link 
together into a good orbital solution,

https://projectpluto.com/temp/cluster.htm

    resulting in a retrograde (i=141) orbit,  quite elliptical (e=0.79), 
  2.25-day orbit,  matching the orbits of the ESA's Cluster 
magnetospheric probe satellites.  I see here :

https://scitechdaily.com/salsas-spectacular-reentry-watching-a-satellite-fall-from-space-live/

    "Until the end of November 2024, ESA operators will maneuver
    the three remaining Cluster satellites to line them up for
    reentries in similarly remote locations over the South
    Pacific Ocean. ‘Rumba’ (Cluster 1) will come down in
    November 2025, and ‘Samba’ (Cluster 3) and ‘Tango’ (Cluster
    4) in August 2026."

    (The 'Salsa' satellite was deliberately re-entered back in 
September.  The surveys got lots of data on that one,  enabling an 
accurate re-entry calculation,  and will doubtless get plenty of data 
for the remaining Cluster objects.)

    Based on the three tracklets we have,  this object will have a 
gradually dropping perigee and will re-enter sometime in August 2026 :

https://projectpluto.com/temp/cluster.pdf

    So A11epLY is either 'Samba' or 'Tango'.  Space-Track hasn't caught 
up on this maneuver,  and I don't know which of those two spacecraft we 
have here.  I've making inquiries and will post TLEs for the object once 
I know what the correct catalog identifiers are.

-- Bill