Month: January 2017


Venus our neighboring planed in the Solar System. It has smaller orbit compared to Earth, therefore it is visible only in the evening or in the morning, but never during the night. This makes it quite difficult to photograph, because the telescope must look through the thick atmosphere. In my case it’s even more difficult, because the seeing is in my place all the time horrible. The picture looks like it’s not sharp, but this is what I was able to get from my backyard.

Technical details:

Telescope:Celestron EdgeHD C14
Aperture:354 mm
Focal length:5850 mm
MountGemini G53f
Camera:ZWO ASI228MC
Corrector:SiebertOptics Barlow 1.4
Exposure:3000xL (40% used), 1.542 ms, Gain 0

M42 Great nebula in Orion

I don’t want to repeat myself, therefore the description of the most famous nebula visible from the northern hemisphere can be found here.

The previous picture has some strange halo around the bright star Hatsya and I was thinking why. Recently, a similar picture came out of my telescope and I realized that this strange halo is caused by the frost on the secondary mirror. I manufactured a homemade dew shield and I don’t have these problems anymore.

This picture is, as usual, composed of narrowband pictures. When I look at it I am still not happy, therefore I hope next year will be better weather and I will make a better picture.

Telescope:Newton 254/1000 mm
Aperture:254 mm
Focal length:730 mm
Mount:Gemini GF53f
Autoguiding:Orion Mini, TS 50/160 mm
Camera:Moravian instruments G2 8300M @-30C
Corrector:ASA 0.73 reducer
Filters:Baader Ha, OIII
Exposure:17xHa, 15xOIII, 240 s, 10xHa, OIII 60 s bin 1x1

M1 Crab nebula

It all started here. Crab nebula is the first catalogued deep space object. Charles Messier was searching for the comet (1758) but discovered his first deep space object. Crab nebula, also called Messier 1, is a supernova remnant – something like Veil nebula, but it’s much further from the Solar system – 6500 light years.

My first picture was made with pinched mirror, therefore I waited two years and captured it properly. Since I live in light polluted area, I chose narrow band filters, in order to get better contrast and composed this picture out of hydrogen alpha (red channel) and OIII (green and blue channel) narrow band pictures.