Tuesday, October 6, 2020
The Tulip nebula in cygnus, Sh2-101
This is my second light photo for the cloudy Autumn season 2020. The area next to well known Tulip Nebula is very beautiful and less imaged due to its large size and relatively low surface brightness. My current toolset is very suitable for this kind of objects, since its kind of heavily undersampled and that's good when I need to capture very dim and large objects.
The tulip Nebula area
Please, click for a large image, it's worth it!
Image is in mapped colours, from the emission of ionized elements, R=Sulphur, G=Hydrogen and B=Oxygen.
A starless view
click for a large image
An experimental starless version shows the actual nebula complex better.
Info
Info
I have shot the actual Tulip Nebula with a large 11" telescope, images and info about the Tulip nebula can be seen HERE. An other interesting detail, a blue crescent like shape at center left. It's a Wolf Rayet shell around a star WR 134. I have shot this also with a large telescope, more info and images can be found HERE
A closeup photo of the Wolf Rayet Shell around the star WR 134
Nebula in light of an ionized hydrogen alone (H-alpha)
click for a large image
click for a large image
Technical details
Processing workflow
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics
Tokina AT-x f2.8 camera lens
Mount
10-micron 1000
Cameras and filters
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and an old spotting scope of Meade LX200
Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III
5nm H-alpha 3nm S-II and 3nm O-III
Total exposure time
H-alpha, 9 x 1200 s, binned 1x1 = 3 h
O-III, from my older photo of the area
S-II, from my older photo of the area
Older photo can be seen here, https://astroanarchy.blogspot.com/2011/12/cygnus-mosaic-18-panels-and-22-x-14.html
Sunday, September 27, 2020
First light for the Autumn season 2020
First light for the season is always a big thing for me personally. I have had really bad troubles to have a imaging telescope. Lots of promises but nothing happens so i'm out of real tools. I do have a kind of working imaging platform built around an old Tokina AT-x 300mm f2.8 camera lens, here is some info about this toolset, https://astroanarchy.blogspot.com/2020/01/the-frankenstein-monster-my-current.html
I have an imaging plan but for the first light I selected something more "easy" to test my system after a six months pause due to nightless nights up here near to polar circle. A supernova remnant Veil Nebula in constellation cygnus is a beautiful and large target with some really dim parts and background nebulae.
I have shot the Veil nebula many times during the years with a different optical configurations and it's always shows something new and different, what a fascinating target!
Veil Nebula
Please, click for a large image, it's worth it
Image is in natural colors combined from the narrowband channels. H-alpha = Red, O-III = Green and O-III + 20% H-alpha = Blue.
A closeup
click for a large image
click for a large image
A full resolution closeup, the camera lens draws beautifully when well collimated and focused.
lots of stars there, star colors are combined from narrowband channels H-alpha and O-III.
lots of stars there, star colors are combined from narrowband channels H-alpha and O-III.
An experimental starless image
click for a large image
The starless version of Veil Nebula makes easier to see very faint details in nebulae otherwise buried under the dense starfield of the Milky Way.
Veil nebula in a light from an ionized hydrogen, H-alpha
click for a large image
click for a large image
INFO
Veil Nebula locates in a constellation Cygnus at distance of about 2400 ly. It's a cloud of ionized gas and dust, leftovers from an exploded star. The star went off some 5000-8000 years ago at distance of about 1470 light years. This, relatively faint target, is difficult to image due to the large angular diameter, about three degrees, and a dense star field. I have shot this target so many times over the years and i never get tired to it, ther is always something new to find in it, Here is a collection my photos from this fascinating target, https://astroanarchy.blogspot.com/search?q=Veil+nebula
Just click "Next Post" at end of the page to see more!
Just click "Next Post" at end of the page to see more!
Technical details
Processing workflow
Image acquisition, MaxiDL v5.07.
Stacked and calibrated in CCDStack2.
Deconvolution with a CCDStack2 Positive Constraint, 33 iterations, added at 50% weight
Color combine in PS CS3
Levels and curves in PS CS3.
Imaging optics
Tokina AT-x 300mm f2.8 camera lens
Mount
10-micron 1000
Cameras, filters and guiding
Imaging camera Apogee Alta U16 and Apogee seven slot filter wheel
Guider camera, Lodestar x 2 and an old spotting scope of Meade LX200
Astrodon filters,
5nm H-alpha 3nm S-II and 3nm O-III
Total exposure time
H-alpha, 12 x 1200 s, binned 1x1 = 4 h
O-III, 6 x 1200 s, binned 1x1 = 2 h
S-II, 3 x 1200s, binned 1x1 = 1h
S-II, 3 x 1200s, binned 1x1 = 1h
Friday, September 25, 2020
Cosmic Clouds 3D is published now!
Cosmic Clouds 3D
Where Stars Are Born
At September 23. we had a live broadcast with Brian May, David J Eicher and me.
It was hosted by Alison Boyle from the Science Museum of London, many thanks!
From top left, Science Museum Keeper of Science Collections Alison Boyle, Artist and astrophotographer J-P Metsavainio, Astronomy Magazine editor David J. Eicher and the legendary Queen guitarist and astrophysicist Brian May.You can see a recording from the live broadcast from here,
You can buy the book from the London Stereoscopic company,
https://shop.londonstereo.com/cosmic-clouds-3-d.html
https://shop.londonstereo.com/cosmic-clouds-3-d.html
Tuesday, September 15, 2020
A press relase, lehdistötiedote
Cosmic Clouds 3D
Where stars are born
A press release About the book is out
You can download it from HERE (In English)
Lehdistötiedote kirjasta on julkaistu.
Voit ladata sen TÄÄLTÄ (suomeksi)
A book by Brian May, David J Eicher and J-P Metsavainio
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