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    Re: Possible limitaion for distance measurement
    From: George Huxtable
    Date: 2009 Mar 11, 20:16 -0000

    Herbert Prinz wrote about the work of Bremiker. I've cope across that name
    before when years ago, on this list or its predecessor, we were discussing
    the finer points of lunar distances at some length.
    
    I had pointed out the subtle, but serious, effect of the changing lunar
    parallax on the apparent speed of the Moon against the stars, imagining that
    I might be the first to note this effect, which could halve the precision of
    lunar distance observations under certain circumstances. Someone coined the
    name "parallactic retardation" for that effect.
    
    However, I was not the first. Wolfgang, from his amazing index, discovered
    that it had all been worked out before, by a fellow called Bremiker. I
    haven't discovered any other publications, before or after Bremiker's, that
    have taken this matter seriously.
    
    If Herbert is discovering, in Bremiker's work, worst-case examples in which
    the precision of a lunar distance is only half of what you might otherwise
    expect, keep an open mind; Bremiker might be including the effects of
    parallactic retardation.
    
    George.
    
    contact George Huxtable, at  george{at}hux.me.uk
    or at +44 1865 820222 (from UK, 01865 820222)
    or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
    
    
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