  In the course of an extensive campaign to measure radial velocities of
galaxies in a selected sample of compact groups photometrically studied by de
Carvalho et al. (1994), we report the discovery of a system very rich in
starburst galaxies and AGNs. This is the system HCG 16 of Hickson's (1982)
catalog of CGs. The 7 brightest galaxies form a kinematical group. From their
spectral characteristics, we have identified one Seyfert 2 galaxy, two LINERs
and three starburst galaxies. Thus, HCG 16 appears to be a dense concentration
of active galaxies. In our sample of 17 Hickson groups, HCG 16 is unique in
this regard, suggesting that it is an uncommon structure in the nearby
universe.
