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stevewanstall

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Everything posted by stevewanstall

  1. The weather forecast was dry overnight so I had a go at collecting data from around 9pm till 5 am. I collected around 3 hours in L, and an hour each in R, g and B. Lost quite a lot of frames to poor guiding in the early stage, plus DSS rejected a few too. Subs were 114 s at a gain of 139, all at 1x1, Celestron 9.25, ZWO 1600mm pro Wikipedia: NGC 4216 is one of the largest and brightest spiral galaxies of the Virgo Cluster, with an absolute magnitude that has been estimated to be −22 (i.e.: brighter than the Andromeda Galaxy), and like most spiral galaxies of this cluster shows a d
  2. Thanks for the feedback, I shall have a go!
  3. Bode's Galaxy in Ursa Major The previous night I had collected five hours of data on M106 to find that DSS couldn't find enough stars in the subs!! I think it must be the contrast reducing effect of a full moon. I need to revisit that one to be sure. Anyway, in order to check it wasn't a problem with DSS, I took some more subs of M81 and then combined them with ones I took in April last year. So, around 5 hours of L and 40 mins each of R, G and B. M82 Cigar Galaxy in Ursa Major A beautifully clear, moo
  4. A very crisp and cold night. I added more luminance data and also collected some RGB for NGC 2841. There is now around 4 hours in L and an hour each in R, G and B. The subs are 114s at a gain of 139. Wikipedia: NGC 2841 is an unbarred spiral galaxy in the northern circumpolar constellation of Ursa Major. A 2001 Hubble Space Telescope survey of the galaxy's Cepheid variables determined its distance to be approximately 14.1 megaparsecs or 46 million light-years. This is the prototype for the flocculent spiral galaxy, a type of spiral galaxy whose arms
  5. With less sharpening. The image is limited by the pixelation though.
  6. Taken with 9.25 Celestron XLT and ZWO ASI1600 in RGB. Better than my last ! Doesn't really compare with some other images on here though :0).
  7. Probably, that was just the lowest I had used. I have not really used SharpCap much or experimented with changing the filed size ROI setting. There is always so much to do/learn!
  8. This is my first ever image of Mars. It was captured using SharpCap, with a ZWO1600M on a Celestron 9.25 XLT. I messed up quite a bit, ruining a lot of frames by have too dim a blue channel. )So, this is based on the poorest resolution camera settings, 800 x 600 pixels. 1000 frames per channel, at around 18 fps, best 25%) However, it is recognisably Mars, so I do have a degree of satisfaction, also I now have a target to improve against. The ice cap is clearly visible, as are dark and light areas . And its Red!
  9. The image is based on around 40 mins in each R, G, B and L, 118s subs, at a gain of 139. Calibrated with dark flats and flats. Wikipedia: NGC 40 (also known as the Bow-Tie Nebula and Caldwell 2) is a planetary nebula discovered by William Herschel on November 25, 1788, and is composed of hot gas around a dying star. The star has ejected its outer layer which has left behind a smaller, hot star with a temperature on the surface of about 50,000 degrees Celsius. Radiation from the star causes the shed outer layer to heat to about 10,000 degrees Celsius, and is about one light-year
  10. Thank you, a pleasure on a warm summer night.
  11. A warm summers night, nicer outside than insdie a hot house. No nautical night, so I thought I would just browse the heavens, keeping a single frame as a souvenir of my tour. The colour image is based on single frames of L, R, G, B. Usual exposure length around 3 mins. Brocchi's Cluster (part of ) Cave Nebula in Cassiopeia Dumbbell Nebula IC 1848 and IC1871 M8 Lagoon Nebula M11 Wild Duck Cluster M16 Eagle Nebula M17 Omega Nebula M18 M0 Trifid Nebula M22 M56 M71 M57 Ring Nebula Part of the Veil
  12. 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 !
  13. 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
  14. I shall Hasta La Vista Green it ! There we go, you are right, a definite improvement!
  15. 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 n
  16. I dont think so, it was green before I used a mask to try and 'enhance' it.
  17. 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
  18. 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 de
  19. 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!
  20. 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
  21. Which telescope were you using? What was the view of the galaxy like?
  22. 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.
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