Avdhoeven

I observed the beautiful aurora of May 10-11 from the Dutch coast. What a wonderful sight it was. One to remember forever...

This image is a combination from a dataset that I obtained from Insight Observatory taken with an AG10 CDK f/6.7 telescope in combination with my own dataset that I obtained with my TMB92ss in the past few years. The first dataset mainly contributed to the resolution while the second dataset helped with reducing noise and making the colors as I like (I used my own color layers in combination with true color stars from the CDK dataset). For this image I made a bicolor using the Ha and OIII data and generating a green channel from the blue and red channels. After that I also made an RGB image using the color layers and using masks I introduced back the star colors. Altogether this resulted in an image with a resolution of 0.48"/pix giving a beautiful detail of this nebula. I'm quite happy with this result to be honest In total 116 hours of data is incorporated in this image. Exposure details are below the image. Telescope: AG10 CDK f/6.7 and TMB92ss Camera: ASI6200mm pro and QSI583ws Link to astrobin page of this image

M31, the Andromeda galaxy. This recording is already 9 years old, but I have completely reprocessed it using, among other things, drizzling in APP and deconvolution with blurxterminator. This clearly shows how it really makes sense to keep old data and revisit it every now and then. The comparison clearly shows the difference between the old and the new processing. Telescope: TMB-92 Camera: QSI-583ws Mounting: NEQ-6 with OAG Exposure: 19x300s L 3x300s B 9x300s R,G 9x900s Ha ; 12x1200s Ha

Thanks. This was taken in the Eifel in Germany under quite dark skies. Sqm 20.4 or so.

Processing from my data storage of NGC7023, aka the Iris nebula. New processing techniques like deconvolution, better noise and star reduction really improve the possibilities a lot. I'm quite happy with the balance that I could obtain between dust, stars and background. TMB92ss / QSI583ws Lum: 60x600s RGB: 3x12x600s

Very nice overview of this region! Love it. If I may give a (very small) criticism. The h alpha looks a bit artificial somehow for me, but that's very personal. But overall a superb image!!!!! Edit: in full size it looks much better probably the compression played it's part on my screen.

After the holidays I was able to shoot one more night of H-alpha data using my new L-ultimate filter. I added this data to the image and could get even more detail in the h-alpha regions. I also cropped it to get a nice field of view for this part of the sky. I'm really happy with this unique image, which because of the comet, I can never take again in the same way

Pictures are evolving sometimes when you look at them longer and see them at different screens. I made a much more 'neutral' version which I think more corresponds to reality.

After posting my 1st version of this image I looked further into it and noticed that the stars got somehow completely destroyed in the original size file. So I decided to do a complete reprocess while guarding the stars and nebulae more during processing. Furthermore I was able to use an OIII dataset from Wei-Hao Wan_ that he made in 2016 from the Outers-4 nebula inside SH2-129. I got his permission to use his data (all his data can be found via astrobin and they are really a great resource!). RGB: Nikon D810a - WO Spacecat 51 Exposures; 15x300s / 51x600s (9.75h) OIII (Wei-Hao [removed word]): Nikon D800 (modified) - Borg 90FL 22x480s / 35x360s (6.5h) Total: 16.25h

This image shows the region around Barnard 150, aka the cosmic seahorse and SH2-129, the bat nebula. This region has a lot to offer to astrophotographers and is quite challenging to capture well. This image was made during our holidays in the Eifel in Germany. Weather forecast was not good for this week but somehow I still got 3 (partly) clear nights in total. I had planned to image this region already quite some time before but when imaging the first night I noticed there was a comet in the field of view. This was comet C/2023 E1 Atlas. The evening after it was already gone from the field of view, so I guess I was lucky to have caught it. Nikon D810a - WO Spacecat 51 Exposures; 15x300s / 51x600s Total: 9.75h

No, no flats used and thanks!

All images made with my Lunt 60Tha - ASI174mm combination.

This image shows SH2-155 aka the Cave nebula which consists of 180 images! With APP I was able to integrate my Luminance, H-alpha and color data to get really the most out of the data. I used blurxterminator to get even more detail out of the image in combination with a touch of noisexterminator. I'm very happy with the result that came out with the new programs. The colours of the stars were as I liked them to be and somehow it resulted (in my opinion) in a very colourful representation of this beautiful region in the sky. More info about the region: This colorful skyscape features the dusty, reddish glow of Sharpless catalog emission region Sh2-155, the Cave Nebula. About 2,400 light-years away, the scene lies along the plane of our Milky Way Galaxy toward the royal northern constellation of Cepheus. Astronomical explorations of the region reveal that it has formed at the boundary of the massive Cepheus B molecular cloud and the hot, young, blue stars of the Cepheus OB 3 association. The bright rim of ionized hydrogen gas is energized by the radiation from the hot stars, dominated by a bright blue O-type star. Radiation driven ionization fronts are likely triggering collapsing cores and new star formation within. Appropriately sized for a stellar nursery, the cosmic cave is over 10 light-years across. [Source: APOD] Exposure info: Telescope: TMB92 Camera: QSI583ws Lum: 90x300s + 21x600s Ha: 42x1200s R,G,B: 9,9,9x600s Total: 29,5 hours

Took some shots of the Wizard Nebula (NGC 7380) last night. I had last photographed this object 11 (!) years ago when I had only been working on the hobby for 1 year. I thought it was time to see if this could be done better. These are 20 shots from 900s taken with my TMB92ss and QSI583ws with an Astrodon 5nm H-alpha filter. To be honest, I was amazed at the amount of detail already showing up in the surrounding gas clouds in this area. Certainly this is an object that I will make OIII/SII shots from to be able to turn this into a full-fledged hubble palette when it is clear again soon.

This 90 megapixel image is the result of a cooperation with 3 fellow astrophotographers, Sara Wager, Dominique Dierick and Kees Scherer and myself. It all started in 2017 when we worked together on a larger mosaic of part of the Cygnus constellation. A zoomable version can be found here: https://zoomhub.net/al3me I would recommend to strawl through the image to find all the details. For example the Soap Bubble Nebula, the Cygnus X1 shockwave, Crescent and Tulip Nebula are nicely visible. Last year (2021) I wanted to make a nice image of the Tulip Nebula (SH2-101) and the nearby hydrogen clouds so I made an image stack consisting of 1 panel of this region. This summer (2022) they predicted a longer period of clear skies and I decided to extend the field of view to get more coverage of this very interesting region. After finishing this image I noticed that I was very nearby the Crescent nebula region and knew I had a lot of data of that region also, so I decided to look onto my image archive to see which data there was more region and that was how I stumbled onto the mosaic data again that we all captured in 2017. It showed that with this data a very nice field of view could be generated with full coverage from the Tulip up to far above the Crescent nebula. Because of the high quality of the data processing was very easy and that is what resulted in an 90 megapixel image of 4,5x6,2 degrees of sky area. On my webpage you can find a lot more info and details about the image including detail cut-outs of interesting parts. Exposures: Dominique Dierick: 36x300s Crescent (3h) Sara Wager: 50x1800s Crescent (25h) Kees Scherer: 38x900s Overall field (9,5h) André van der Hoeven: 211x900s Detailed regions (52,75h) Totaal: 90,25h Equipment: Dominique: Takahashi FSQ106/QHY163M Sara: Orion Optics ODK10/TMB152/QSI683wsg Kees: Skywatcher Esprit 100D/QHY16200 André: TMB92/QSI583ws