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stevewanstall

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About stevewanstall

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    Star Forming

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    https://stringywormsinspace.blogspot.co.uk/

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    North Somerset, UK
  1. I like the way you have handled the stars. It is something I need to really look at. I have tried imaging this but have ended up with stupendous stars spoiling it !
  2. This is based on 114s subs, around 60 mins in L,R, G and B. First time I have used the ZWO camera with the Skywatcher refractor. From looking at Xiga's image I can now see how deplorable my star sizing is ! Wikipedia:The Pelican Nebula (also known as IC 5070 and IC 5067[1]) is an H II region associated with the North America Nebula in the constellation Cygnus. The gaseous contortions of this emission nebula bear a resemblance to a pelican, giving rise to its name. The Pelican Nebula is located nearby first magnitude star Deneb, and is divided from its more prominent neighbour, the North America Nebula, by a molecular cloud filled with dark dust. The Pelican is much studied because it has a particularly active mix of star formation and evolving gas clouds. The light from young energetic stars is slowly transforming cold gas to hot and causing an ionization front gradually to advance outward. Particularly dense filaments of cold gas are seen to still remain, and among these are found two jets emitted from the Herbig–Haro object 555. Millions of years from now this nebula might no longer be known as the Pelican, as the balance and placement of stars and gas will leave something that appears completely different. Equipment: Skywatcher ED80 at F/7.5, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope
  3. I shall Hasta La Vista Green it ! There we go, you are right, a definite improvement!
  4. Subs of 114s, around an hour in each of L,R,G and B. Moon was around 4 days old and not a lot of astronomical night! Wikipedia: NGC 6946 (also known as the Fireworks Galaxy or Caldwell 12) is a face-on intermediate spiral galaxy with a small bright nucleus, whose location in the sky straddles the boundary between the northern constellations of Cepheus and Cygnus. Its distance from Earth is about 25.2 million light-years or 7.72 megaparsecs. Various unusual celestial objects have been observed within NGC 6964. This includes the so-called 'Red Ellipse' along one of the northern arms that looks like a super-bubble or very large supernova remnant, and which may have been formed by an open cluster containing massive stars. There are also two regions of unusual dark lanes of nebulosity, while within the spiral arms several regions appear devoid of stars and gaseous hydrogen, some spanning up to two kiloparsecs across. A third peculiar object, discovered in 1967, is now known as "Hodge's Complex". This was once thought to be a young supergiant cluster, but in 2017 it was conjectured to be an interacting dwarf galaxy superimposed on NGC 6964. Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope
  5. I dont think so, it was green before I used a mask to try and 'enhance' it.
  6. This image is based on 114s subs, with around 8 hours in Red, 4 hours in Blue and Green. I have an earlier post on here where I asked for help because I was having trouble processing the data (less of it then). Now I have been able to process it more, with using screen invert mask to try and show the outer layer more clearly. What I cannot work out is why it is green ! Other images I have seen show it as red, but I cannot see where the green comes from, though in the histogram in PS, the red channel becomes much broader than the blue and green. Anyway, this is at the limit of my processing skills and is the least weird looking one I can come up with!. I attach the stacked files if anyone wants a play. I have only calibrated with flats. Ball.TIF Gall.TIF Rall.TIF
  7. The image is based on 114s subs, around 2 hours in each of L, R , G and B. Processed in DSS, PS and Lightroom. I am guessing it is suffering from not enough data/ no narrowband since it is not as 'full' as other images I have seen. APOD: NGC 6888, also known as the Crescent Nebula, is a cosmic bubble about 25 light-years across, blown by winds from its central, bright, massive star. This sharp telescopic portrait uses narrow band image data that isolates light from hydrogen and oxygen atoms in the wind-blown nebula. The oxygen atoms produce the blue-green hue that seems to enshroud the detailed folds and filaments. Visible within the nebula, NGC 6888's central star is classified as a Wolf-Rayet star (WR 136). The star is shedding its outer envelope in a strong stellar wind, ejecting the equivalent of the Sun's mass every 10,000 years. The nebula's complex structures are likely the result of this strong wind interacting with material ejected in an earlier phase. Burning fuel at a prodigious rate and near the end of its stellar life this star should ultimately go out with a bang in a spectacular supernova explosion. Found in the nebula rich constellation Cygnus, NGC 6888 is about 5,000 light-years away. Crescent Nebula in Cygnus, NGC 6888 Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope
  8. Thank you for the detailed advice. I shall try and put this into practice over the next couple of days. Thank you for the link, again, I shall try this out. Onwards and upwards!
  9. I have collected LRGB subs for M57 and was able to produce a reasonable image. Having read out the outer layers, I decided to collect a lot more red subs in order to see this faint detail. I have collected around 5 hours worth and when the data is (over) stretched, I can see the outer layer. My problem is, is there any way to combine this with the original image without it looking like a car crash? I have attempted to use a select tool and eraser but it looked horrendous. Should I just : 1. Get a lot more red data 2. Match this with B and G so that the image is colour balanced (ish) from the start? Thanking you in advance for any suggestions.
  10. Which telescope were you using? What was the view of the galaxy like?
  11. I was thinking of trying this the other night, then got distracted. Really nice images, BTW . For a further target, Cor Caroli would be good ? I MUST have a go, maybe tonight.
  12. This is the result of 12 x 60s subs in each of luminance, red, green and blue light. There was a 10 sec pause between each image to give more time for the comet to move (requirement for the processing technique). According to the method I was following, the total data time should be under an hour because comets are such dynamic objects. I wanted to have the stars and comet both in as sharp a view as possible (the comet moves between subs, so with normal processing you end up with a 'streaked' comet) I was trying to follow Bernard Hubl's method but in the end had to use Deep Sky Stacker and its 'comets and stars' function. For Luminance I produced an image of the comet only. For R, G and B I produced an image of the comet plus stars. The channels were combined in PS I stretched both the L and the RGB images in PS and then combined them. The trouble I found with this is that stretching to show the faint tail with the limited data meant I also developed the streaks left by the stars. My knowledge of PS is not up to removing broad faint streaks (see the star on the lower right !!) but leaving the tail. Anyway, for better or worse: Comet C/2017 T2 Panstarrs Magnitude: 8.6 Phase: 36 ° Distance: 1.6765au Solar distance: 1.6185au Velocity: 33.1km/s Estimated tail length: 0.04au Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope, Celestron Focus Motor Software: Ascom 6, Eqmod, Cartes du Ciel, AstroPhotography Tool, PHD2
  13. I came across this website which is collating observations, so you might want to submit yours: http://www.rochesterastronomy.org/sn2020/sn2020jfo.html
  14. Messier 57 is is just coming into a position for a decent look around 11 30 pm. IT is a colourful object and I thought it would give me a good target with which to practice my colour developing in PS/Lightroom. I have read so much about how to produce a LRGB image from the four stacked/calibrated luminance, red, blue and green images, a lot seems contradicatory and some, when followed, gave me colour yes, but not as we know it. I am sure a fair chunk must be put down to me. Anyway, I now have a work flow which gives me colour, sometimes resembling what other people have obtained. Progess of sorts. This images is based on 114s subs at gain 139, offset 21. L 39, R 20, G 20, B 19 Calibrated and stacked in DSS (flats, dark flats and darks) Messier 57 Ring Nebula in Lyra NASA: M57, or the Ring Nebula, is a planetary nebula, the glowing remains of a sun-like star. The tiny white dot in the centre of the nebula is the star’s hot core, called a white dwarf. M57 is about 2,000 light-years away in the constellation Lyra, and is best observed during August. Discovered by the French astronomer Antoine Darquier de Pellepoix in 1779, the Ring Nebula has an apparent magnitude of 8.8 and can be spotted with moderately sized telescopes. Equipment: Celestron 9.25 XLT at F10, Skywatcher EQ6 Pro GEM, ZWO 1600MM Pro, ZWO EFW with ZWO LRGB filters, QHY5IIC guide camera on Skywatcher 9 x 50 finderscope, Celestron Focus Motor Software: Ascom 6, Eqmod, Cartes du Ciel, AstroPhotography Tool, PHD2
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