Unloved M73 is an asterism of 4 stars in Aquarius near M72. Messier said he could see nebulosity but he must have had his wine goggles on. The 11th mag stars are at different distances, the brightest is 137lyrs the second brightest is 440lyrs. Having four 11-12th mag stars together like that is highly unusual.
Pismis 24 is three stars of 100 solar masses at the centre of NGC6357 and is the brightest star in the image, there is lots of extinction giving the stars that brown colour.
Just had to have a look at NGC5139 centre at long FL but seeing was not good this time but many blue stars showed up.
