Over the last few years I have collected the Terzan clusters catalogued by Agpo Terzan an French Armenian astronomer in 1968. The small distant globulars are obscured by Milkyway dust in the galactic bulge of Sco/Sgr region and remained undiscovered.
You need a 14-16" scope to see these visually at a dark site as they are 12-16th mag.
Terzan 5 is the most interesting as it is 2,000 light years from the galaxy core and has 200 x-ray pulsars emiting x/gamma rays energy as high as 24 TeV and high metallicity stars 12.5 bn yrs old. Terzan 5 has the densest core of any globular cluster and is 0.5 parsecs diameter.
