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Table 1:

Published results for the nature and evolutionary state of V645 Cyg.
Sp. AV V D Ref.
type mag mag kpc  
O7 4.2 15.1a $\ge$3, $\sim$6 Cohen (1977)
  3.6   $\ge$1, $\le$6 Humphreys et al. (1980)
A0 2.5   3.5 $\pm$ 0.5 Goodrich (1986)
Estimate of the star's spectral type is listed in Col. 1; interstellar extinction toward the object in Col. 2; object's visual brightness in Col. 3; distance toward the object in Col. 4; and a reference to the estimates in Col. 5; a the brightness for the knot N0.

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