Messier M4 is a globular cluster located in constellation Scorpius. It has approximately 100 000 stars and it’s roughly 7200 light-years away from us, which makes it one of the closest globular clusters to the Solar system. Hubble Space Telescope discovered many white dwarf stars, which are the oldest known stars in our galaxy, having an age of 13 billion years.
The picture was taken during my travels to Greek island Milos and it’s only integration of 24 of two minutes exposures. This means only 48 minutes in total.
|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:8x||24x120s, Gain 134, bin 1x1,|