M14 is one of the brighter globular clusters
and is unusual for its slightly elliptical shape. Although apparently
dimmer than its two Ophiuchus globular cousins, M10 and M12, it
is considerably more distant and is therefore more intrinsically
luminous. It is estimated to have an absolute luminosity 400,000
times greater than our sun. M14 is rich in variable stars which
number around 70. M14 is one of Charles Messier's first discoveries
(1764). M14 is one of the few globular clusters to host a nova
retrospectively discovered in 1964 by Amelia Wehlau of the University
of Western Ontario who surveyed photographic plates taken in 1938.