Radius at time t in the 2 body problem

  1. For 2 bodies rotating in ellipses about their centre of mass, (62) p171 of Moulton (1914),
    Periodic orbits gives the distance between them as a series in eccentricity e, with coefficients
    linear combinations of cos kM, k=1,2,... where M=nt is the mean anomaly.

    I once found the formula online but no luck since. I think the "-1" in the first line of (62) should not be there.
    Is there a list of errata?

    thanks
    kit in nz
     
  2. jcsd
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