  We report a discovery of an extended globular-like star cluster, M33-EC1, at
the outer edge of the spiral galaxy M33. The distance to the cluster is 890
kpc, and it lies at a 12.5 kpc projected distance from the center of M33. Old
age (>~7 Gyr) and low metallicity ([M/H] <~ -1.4) are estimated on the basis of
isochrone fits. Color-magnitude diagrams of stars, located in the cluster's
area, photometric and structural parameters of the cluster are presented.
Cluster's luminosity (M_V = -6.6) and half-light radius (r_h = 20.3 pc) are
comparable to those of the extended globular clusters, discovered in more
luminous Local Group galaxies, the Milky Way and M31. Extended globular
clusters are suspected to be remnants of accreted dwarf galaxies, and the
finding of such a cluster in the late-type dwarf spiral galaxy M33 would imply
a complex merging history in the past.

Astrophysics