Absolute and relative motion of δ Cep A and δ Cep B (HD 213307).
|δ Cep A||δ Cep B|
Notes. The absolute and linear proper motions (μ and Δμ) are expressed in mas a−1 and the differential tangential velocity of B relative to A (dvtan) in km s−1. The angular proper motion was converted to velocity using the GDR2 parallax of component B (ϖG2, B = 3.393 ± 0.049 mas).
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