Object Analysis

Messier 19 (M19) is a globular cluster in the constellation Ophiuchus. It was discovered by Charles Messier in 1764. It is the most oblate (flattened) globular cluster known, with its stars arranged in a distinctly oval shape rather than a perfect sphere.

This extreme flattening is likely due to M19's proximity to the Galactic Center, which is only about 6,500 light-years away. The intense tidal forces from the Milky Way's central mass pull on the cluster, stretching it out. It is located roughly 28,700 light-years from Earth.

M19 is very rich in stars and has a high concentration of RR Lyrae variable stars. In a telescope, its dense, elongated core is unmistakable. It is one of the many ancient clusters that reside in the crowded "bulge" region of our galaxy, providing clues about the Milky Way's violent early history.