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    Re: Celestial data for the planet Mercury
    From: UNK
    Date: 2016 Feb 24, 07:40 -0800

    Aha. So this is what a "1 mas precision ephemeris" refers to: the positional accuracy of the object, but not of its individual parameters? That means, for instance, that even though MICA gives me the RA of Polaris to 0.001 s of time, I can only trust it to +/- 0.080 s? (cos 89.3 deg = 1/80) Or does it mean that the positional accuracy of Polaris obtained from MICA will always be that much better than that of, say, Betelgeuse?

    Herbert

       
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