  Determining the distances to the Planck Galactic cold clumps (PGCCs) is
crucial for the measurement of their physical parameters and the study of their
Galactic distribution. Based on two large catalogues of stars with robust
distances and reddening estimates from the literature, we have estimated
accurate distances to 61 PGCCs in the second Galactic quadrant. For this
purpose, we have selected stars along the sightlines overlapping with the cores
of the sample clumps and fitted the reddening profiles with a simple reddening
model. The typical uncertainties of the resultant distances of these PGCCs are
less than 8 per cent. The new estimates differ significantly from the kinematic
values, well known to suffer from large errors. With the new distances, we have
updated the physical properties including the radii, masses and virial
parameters of the cores of the PGCCs.
