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Fig. 6.

image

Star catalog bias corrections (catBias) of observed absolute coordinates (obs = ABS) in OCNS2019 with respect to Gaia-DR2. The four panels display the biases, respectively, for Triton, Nereid, the set of inner satellites (obsTrg = 805–808, i.e., Despina, Galatea, Larissa, and Proteus), and the set of outer satellites (obsTrg = 809–813, i.e., Halimede, Psamathe, Sao, Laomedeia, and Neso). Δα cos δ is the bias along the direction of Right Ascension and Δδ in Declination. The vertical dashed line in red denotes Δα cos δ = 0 and the horizontal dashed line shows Δδ = 0.

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