Globular Star Cluster NGC 6544 in Sagittarius | Vera C. Rubin Observatory
Globular cluster NGC 6544 as imaged by the National Science Foundation–Department of Energy Vera C. Rubin Observatory. This tightly packed globular cluster is home to tens of thousands of stars. NGC 6544 is located in the western part of the constellation, on the edge of a rich star field; its location is easily recoverable as it is located just 50' towards the southeast compared to the famous Lagoon Nebula. It can also be seen with 10×50mm binoculars as a small white spot like a misty star; with a telescope of 120mm and 100× magnification a few small stars may be resolved. Telescopes from 200mm up allow resolving of dozens of dim stars.
Because its declination is rather southern, this cluster can be mainly observed by observers located in the southern hemisphere, although it is still observable even up to medium temperate latitudes. The best time for observation in the evening sky is between June and October.
NGC 6544 was observed for the first time by William Herschel in 1784. He looked at it through his 18.4 inch reflector and described it as a fairly bright and large object, circular and resolvable into stars.
Release Date: June 23, 2025
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