Messier 37 is the largest and the brightest open cluster in constellation Auriga. Visually, it has two deep space neighboring open clusters M36 and M38. The cluster was discovered by Giovani Battista Hodierna in 1654 and catalogued by Charles Messier in 1764. The cluster contains a lot of red giant stars and it is approximately 4500 light-year away from Earth.
This is the second deep space object, which I captured in a single night. The clouds rolled in, therefore I was able to capture only 30 pictures, 60 second each.
|Telescope||Newton 254/1000 mm|
|Focal length||1000 mm|
|Autoguiding||ZWO 174MM, TS 60/240 mm|
|Camera||ZWO 071 Pro @-20°C|
|Corrector||Explore Scientific HR coma corrector|
|Filters||Hutech IDAS LPS-D2|
|Exposure||30x60s, Gain 94, bin 1x1,|