  The unprecedented precision in Gaia measurements of parallax allows us to
capture a larger number of binary clusters. With the releases of Gaia data, the
number of Galactic open clusters (OCs) increases with great rapidity, providing
an excellent opportunity to confirm more binary clusters in the Milky Way.
Using a recently released OC catalog, we employed the photometric and
astrometric data of and OCs and their member stars to find close binary open
clusters (CBOCs). The 3-dimensional spatial coordinates, proper motions, and
color-magnitude diagrams (CMDs), and a new CBOC identification technique are
used for identifying CBOCs. We finally found 13 new pairs of CBOCs. The
fundamental parameters of these CBOCs are determined by fitting the CMDs to the
isochrones of stellar populations. When we check the similarity of reddenings,
ages and metallicities of the sub-clusters of CBOCs, eight CBOCs are shown to
be primordial binary open clusters (PBOCs). This paper reports the detailed
data of the 13 newly found CBOCs, which will help us to do many further
researches on binary star clusters.
