WOW Double Pinhole Solargraph June-December 2018

Today I opened my DIY Pinhole Camera after being outside for exactly 6 months. This time I made two holes in my pinhole camera making it a bit more creative. I'm really satisfied of  my result. The solargraph is very sharp and the double hole makes it even more special. I think this Solargraph is one of a kind :)
The pinhole camera was installaed in my garden with a southview on my tree.

Time to install your pinhole camera for a Solargraph - DIY Solargraphy

Last day to prepare for your Solargraph. This date is perfect to install your Solargraph and keep it outside untill June 21, 2019.

How to make a pinhole camera for a Solargraph? See instruction noted in my blogpage, both English as Dutch.

Start Astronomical Winter

In the northern hemisphere the astronomical winter will start at exactly 23h23 local time (UT22h23).

Fix the date 23 january 2019 : Sir Roger Penrose

On Jan 23, 2019, Sir Roger Penrose will give a lecture as part of Studium Generale at Maastricht University. I made already a big circle in my agenda for this unique event.

Bathtinov Mask

For the first time I used a Bathinov Mask (in loan from Walter) to focus my telescope accurately. Putting the mask in front of my telescope and then pointing the scope on a bright star will show spikes. When the central spike is centred between the two outer ones, the system is focus.

Orion Nebula M42 - 9min exposure

The below picture is the result of 9 minutes exposure of the Orion Nebula or Messier M42.
Equipment : TAL200K with Nikon D7500. In total 18 pictures, each 30s, ISO6400 are stacked using DeepSkyStacker. The tiff32 file was edited using CS4.

NGC Objects 1647 2024 2129 2323

I made some pictures of a couple of NGC objects during the evening of december 13, 2018 :

NGC 1647 : Open Star Cluster
NGC 2024 : Flame Nebula
NGC 2129 : Open Star Cluster
NGC 2323 : Open Star Cluster - Messier M50

All pictures taken on TAL200K and stacking with DeepSkyStacker. No usage of darks. Editing from Tiff32bit using CS4 by modification of curves and levels on each RGB channel.