Messier73 is a group of stars (asterism), which are visually close to each other if viewed from Earth. M73 was discovered by Charles Messier on October 4 1780 and catalogued as an open cluster with some nebulosity. Latest investigation revealed that M73 is not a cluster, but just an asterism.
|Telescope||Newton 150/600 mm|
|Focal length||660 mm|
|Autoguiding||QHYCCD miniGuideScope 130 mm f/4.3, ZWO 174 MM|
|Camera||ZWO 071 Pro @-10C|
|Corrector||Explore Scientific HR coma corrector|
|Filters||Astronomik L-1 - UV IR Block Filter|
|Exposure||75x180s, Gain 134, bin 1x1,|