207 New Open Star Clusters within 1 kpc from Gaia Data Release 2
  We conducted a survey of open clusters within 1 kpc from the Sun using the
astrometric and photometric data of the Gaia Data Release 2. We found 655
cluster candidates by visual inspection of the stellar distributions in proper
motion space and spatial distributions in l-b space. All of the 655 cluster
candidates have a well defined main-sequence except for two candidates if we
consider that the main sequence of very young clusters is somewhat broad due to
differential extinction. Cross-matching of our 653 open clusters with known
open clusters in various catalogs resulted in 207 new open clusters. We present
the physical properties of the newly discovered open clusters. The majority of
the newly discovered open clusters are of young to intermediate age and have
less than ~50 member stars.
