Re: BY Obs Nov 2 and a lot of Questions

From: Bjoern Gimle@GlocalNet (Gimle@GlocalNet)
Date: Tue Nov 04 2008 - 08:30:23 UTC

  • Next message: Russell Eberst: "2008NOV3.OBS"

    We have conflicting number series because any agency finding satellites need 
    to invent one, when they cannot associate it with a known launch 
    year+number+part.
    SpaceTrack and ESA are not likely to use SeeSat-L designations.
    If SeeSat observers tracked an object before ESA published its elements,
    we like to keep our numbering for historical continuity.
    
    SpaceTrack assigns 8XXXX catalog numbers to unmatched elsets,
    but haven't published any of these? Goddard SFC occasionally did.
    ESA has their 96XXX series, SeeSat the 90YYY numbers, both incremental by 
    first orbit publication.
    
    Obviously, there is no proper Intl.ID if unidentified, but SeeSat adopted 
    YYDDDA,
    where YY is year of first obs, DDD is 500+day no of first obs.
    
    OBSENTRY/IOD author George D. Lewis suggests other numeric standards for 
    designating observations of unknowns, and offers a coding for type of orbit 
    where we use "A":
    
    UNK   Generic label for an unknown object.
    LEO   Signifies that the object is suspected to be in low Earth orbit.
    MEO   Signifies that the object is suspected to be in medium Earth orbit.
    HEO   Signifies that the object is suspected to be in high Earth orbit.
    GEO   Signifies that the object is suspected to be in geosynchronous orbit.
    GTO   Signifies that the object is suspected to be in geosynchronous 
    transfer orbit.
    MOL   Signifies that the object is suspected to be in a Molniya orbit.
    
    ZRO   Results from converting observations from the OTWG or Eberst
      formats, for which the traditional designation for any unknown is 9900000.
    
    /Björn
    
    ----- Original Message ----- 
    > ...
    > Everyone, why do we have so many numbering schemes?
    > ...
    
    
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