How good guiding can be
Why we need to guide? Because mount mechanics are of limited accuracy, and once this accuracy is lower than our imaging setup resolution we need to guide. There are some mounts available equipped with... Read More
Active M106
Messier 106 is intermediate spiral galaxy in Canes Venatici. It was discovered by Pierre Mechain in 1791 and is located about 22 million light years from Earth. M106 is quite bright galaxy available f... Read More
Strange NGC6765
NGC6765 (PK 62+9.1) is small (apparent Jupiter size) and faint (about 13mag) planetary nebula in Lyra. There is not much more information available on this strange planetary nebula. Distance to the ne... Read More
Pixel scale and resolution
Is it the same? Can we increase resolution just by making pixels smaller? In some cases we can, but quite often we cannot. For this article scope I assume the sensors I describe have the same no... Read More
Looking forward to autumn
White nights is almost here. Currently there is less than two hours of complete darkness, and it will be worse. At my northern latitude I need to wait till the end of July for better conditions. But b... Read More
NGC4559 at Coma
NGC4559 is little bit forgotten intermediate spiral galaxy in Coma Berenices. It is located about 30 million light years away and belongs to Coma I Group of galaxies. Under dark sky can be spotted wit... Read More
CMOS gain settings part II
In the first part I made a little introduction on gain setting in CMOS cameras and also presented simple comparison made with luminance filter. In this entry I will show another comparison – but... Read More