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    Re: Polaris' PM in RA?
    From: Dave Walden
    Date: 2020 Sep 24, 15:16 -0700

    https://iopscience.iop.org/article/10.1088/0004-6256/136/3/1137/pdf

    Table 5 Proper-Motion Data for Polaris A Quantity System µα cos δ µδ (mas yr−1) (mas yr−1)

    µFK5 FK5 +38.30 ± 0.23 −15.20 ± 0.35

    µFK5 HIP +41.50 ± 0.97 −16.73 ± 0.75

    µHIP HIP +44.22 ± 0.47 −11.74 ± 0.55

    ∆µ = µHIP − µFK5 HIP +2.72 ± 1.08 +4.99 ± 0.93

    ∆µfit HIP +4.59 ± 2.52 +1.21 ± 0.74

       
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