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AvdH last won the day on August 29

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  1. IC 5146 (also Caldwell 19, Sh 2-125, and the Cocoon Nebula) is a reflection/emission nebula and Caldwell object in the constellation Cygnus. The NGC description refers to IC 5146 as a cluster of 9.5 mag stars involved in a bright and dark nebula. The cluster is also known as Collinder 470. It is located near the naked-eye star Pi Cygni, the open cluster NGC 7209 in Lacerta, and the bright open cluster M39. The cluster is about 4,000 ly away, and the central star that lights it formed about 100,000 years ago; the nebula is about 12 arcmins across, which is equivalent to a span of 15 light years. When viewing IC 5146, dark nebula Barnard 168 (B168) is an inseparable part of the experience, forming a dark lane that surrounds the cluster and projects westward forming the appearance of a trail behind the Cocoon.
  2. Full resolution (click on image): Barnard 344 is a dark nebula in the constellation of Cygnus. It’s located close to the star Sadr in the Gamma Cygni Nebula (RA: 20h18m57.4s DEC: +40º 40′ 01″). Barnard 344 is located on the bottom of the image. This is one of my favorite regions for astrophotography. This region is very rich of dark and emission nebulae. On the image also VanDenBergh 130, a reflection nebula in this region, can be seen. It’s the circular cloudshape on the left center of the image. LBN234 is an emission nebula glowing with hydrogen and sulphur in the center of the image. Barnard 344 was described by Barnard himself as: “Dusky spot, 7′ long; like an arrowhead, pointed SW; small star at NE end”. This image is a combination of narrowband imagery with RGB images taken during a number of nights almost a decade ago already in 2013. I did a complete reprocessing of the luminosity image using newer software and with more computer power to get higher resolution. Also the colors were 'polished' to get a better balance. In 2015 this image was an Apod, but I think with this processing it became quite a bit more detailed and nicer to see the details. Telescope: TEC-140 Camera: QSI-583 Mount: Skywatcher NEQ-6 H-alpha: 6 x 1800 s (3nm astrodon) SII: 3 x 1800 s (3nm astrodon) OIII: 4 x 1800 s (3nm astrodon) RGB: (4,4,4) x 600 s (astrodon TrueRGB) Total exposure time: 8.5 hours
  3. Nice! It's a nice object to image. You should try to get the x-1 shockwave. Should be visible 🙂
  4. Last night I put my new pillar with the special designed quick coupler (made by Herman ten Haaf) to the test. I did a pole alignment last week using Sharpcap and took everything off and repositioned the mount 2 times this week. Both times I had a polar alignment within 1' (1 arcminute) without doing an alignment (checked with sharpcap). I'm very happy with this. Last night this resulted in a guiding rms of less then 0,6" on both axes and so I could get very nice and small round stars. This image is a first result of only 6x900s Ha (5nm astrodon) because of incoming clouds using my TMB92ss and QSI583ws. But it is already promising and a nice target for the coming time to get more data.
  5. This is my first image post on this forum. I hope you like it and just shoot at it 🙂 NGC 7822 is an emission nebula located in Cepheus, about 3,000 lightyears away. It’s a violent, chaotic deep-sky region where young stars are being born, their powerful radiation ionising the surrounding gas and causing it to glow. These energetic stellar winds are also carving out the dusty streams and pillars seen throughout the nebula. Within these dark, dusty regions, new stars are likely being born, but the powerful radiation that’s fuelling NGC 7822’s light emission is also destroying the cosmic gas and dust necessary for stellar birth, effectively cutting them off at the source. (source) This image was made from a combination of data taken in 2014 and 2017 using a Takahashi FSQ106 with a SXV-H9 in 2014 and my TMB92ss with a QSI583ws in 2017. Using recent improvements in astropixelprocessor I was able to finally combine this data into one result improving details in the central part of the nebula. Processing was fully done using astropixelprocessor and adobe photoshop. This region is quite interesting and I think my next project will be to expand the range around the nebula because there is much more nice nebulosity in this region.
  6. I just discovered this (new?) astronomy forum. I was quite active in astrophotography in recent years, but in last 2 years I didn't make too much new images, but I'm planning to pick that up soon again 🙂 I photograph a lot using my TMB92ss and Spacecat 51. Besides that I also have a C11 and a Lunt 60 at my disposal. I work with ccd (QSI583) and DSLR (Nikon D810a). For some more of my imagery you can look in flickr or at my home-page. In 2016 I wrote a book showing my images and it was sold all over the world which I'm still quite happy with. I hope to share some of my images here every now and then and people are always welcome to ask questions! Hope to see you soon...
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