Messier55 is a globular cluster located in constellation Sagittarius. This cluster is very difficult to photograph from central Europe, because there is located not far from horizon. For example Charles Messier hat troubles to locate this cluster and it took him 14 years to spot it. I made a trip to Gavdos – the southernmost place is Europe. There the cluster was significantly upper in the sky.
M55 is 17600 light-year far from the Solar system, it has approximately 100 light-year diameter and contain 100 000 stars.
|Focal length:||917 mm|
|Autoguiding||QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM|
|Camera:||ZWO 1600 MC @ -15C|
|Corrector:||Astro Physics CCDT67|
|Filters:||UV, IR cut|
|Exposure:||37x 120s Gain 240|