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Found 12 results

  1. Well I think I was the first gig on Lucas Mesu's UK tour. He was doing a round robin to see the UK customers who'd been unfortunate enough to get mounts with a dodgy batch of RA motor/encoders. It was really nice to get to chat about the mount with the designer. He was clearly frustrated with the situation, but still just as enthusiastic about the merits of his design, and logic would certainly support this type of friction drive. He was keen to explain that there will always be some level of 'ripple' on the PE, as the pin/rollers can never be completely perfect, but I took a couple of tracking plots first, and the was an obvious step change in performance from the old RA motor. It's early days, but it certainly looks promising. The only ripple I can see has an amplitude just under 0.5 arcsecs in 20s (42s full pin rotation period). I'm new to off axis guiding, and still tweaking settings in PHD, plus the seeing wasn't great last night and there was a gusty wind. In spite of this, I got a half decent shot of NGC891. This is a sum of 10x15 min Atik 460 unbinned Lum subs, at about 1150mm (RC8 + CCDT67 at just under max spacing). Lodestar OAG'd with 2s guide subs via PHD. I know the stars aren't ultra round, and I have some field tilt/curve, but it's not a bad start. Happy to see PGC9101 in the lower left, first time I've caught this in any kind of detail. Shame I'm going away over the new moon - doh! More soon, Jack
  2. alan4908

    NGC891 and friends

    From the album: Deep Sky II

    A non cropped image of the NGC891 galaxy. The cropped version of NGC891 is also within this album. The annotation shows the numerous galaxies that are also present within the image - about 11 hours exposure.
  3. From the album: SW 150PDS - DSLR 600D / Atik Titan/Atik 314L1+/Atik Infinity

    Equipment SW 200PDS Atik Infinity 60 min exposure Preprocessing AstroArt and Startools, processing Photoshop

    © B G Wadham

  4. From the album: DSO, Nebula, Galaxies, Comets etc

    NGC891(C23) 28.11.2016 Using Atik 16IC-S monochrome CCD camera on Skywatcher Equinox 80 ED on HEQ5 Pro SynScan mount A total of 5 x 5 minute and 9 x 10 minute light frames - no filters Stacked in Deep Sky Stacker and processed in Photoshop Elements 11 NGC891 (C23) is an edge-on unbarred spiral galaxy in the constellation of Andromeda, and is estimated to be at a distance of 31 million light years. it is a massive galaxy measuring about 110,000 light years in diameter and has a mass of about 150 billion suns. This beautiful galaxy is seen almost perfectly from it's side from our perspective.

    © vicky050373

  5. This is a reprocessed LRGB image was that originally submitted in the Deep Sky section. It was taken with an Esprit 150 on a GM1000HPS and has a total integration time of about 12 hours. I was very happy with the amount of details resolved in the main galaxy. The starfield was processed separately from the galaxy, with the purpose of minimizing the effect of the quite bright red/yellow stars, however, I still highlighted the various small background galaxies. Alan
  6. This is an LRGB image taken with my Esprit 150, it has a total integration time of just below 12 hours. The galaxy is surrounded by quite bright yellow/red stars, in an attempt to control these I decided to process the star-field separately from the main galaxy. I quite like the details and colours of the main galaxy and I was pleased to capture a little detail in the small background galaxies. Alan LIGHTS: L:21, R:17, G: 15, B: 17 x 600s. BIAS:100, DARKS:30, FLATS:40 all at -20C.
  7. alan4908

    NGC891 (reprocessed)

    From the album: Deep Sky III

    A reprocessed attempt on NGC891. The starfield was processed separately from the main galaxy in an attempt to reduce the impact of the bright red/yellow stars. I was very happy with the amount of detail displayed in the main galaxy. LIGHTS: L:21, R:17, G: 15, B: 17 x 600s. BIAS:100, DARKS:30, FLATS:40 all at -20C.
  8. alan4908


    From the album: Deep Sky II

    A cropped LRGB image of the NGC891 (aka Outer Limits) galaxy - about 11 hours exposure.
  9. alexbb


    Here I have a quick session of NGC891. It was shot during multiple nights between targets, 1-2 hours each night. It consists of almost 6h of luminance and 40min each RGB. 120s subs. I only shot 1/2 ROI so no larger FOV. I think I could think of a larger and longer scope for this small targets. Clear skies! Alex
  10. I was a bit dubious about attempting to image this since it is quite small in my field of view. Anyway, here's the result, a cropped LRGB image which represents about 11 hours. I also manged to capture quite a few other galaxies. I've annotated these in the uncropped image below: LIGHTS: L:28; R:7:G:12:B: 17 x 600s; DARKS:30; BIAS:100; FLATS:40 all at -20C. Alan
  11. NGC 891 Imaged last night under a Moon of 70%. No filteration used. 127mm triplet, Atik 428Ex and a AZEQ6 mount that still needs adjustment in PA... Total exposure is 92 minutes 7 x 10min subs 2 x 5min subs 3 x 4min subs 20 x 10min Darks 65 x Offsets. No Flats.... light box project underway! :) Well i'm happy enough with the result. I've hardly touched it post stacking. Hope you like..
  12. This weekend managed to free some time and decided to get a rest from the APT development by gathering some more photons At the end my primary hobby is astro-photography... It is not very popular target - NGC891, a galaxy 30mly away in the Andromeda constellation, in region full of small fuzzies. Looking at it now I think that it would be better to use ISO 800. F/5.3 is quite fast and doesn't allow to show much of the stars colors... Looks like I can't get away from the 2h curse . No matter what I plan or do almost all my objects gather something around this limit... Next night I tried to image it again, but the sky was quite unstable and the image was very blurry, so decided not to lose time and try something more forgiving... Here is it: and a version with cropped main galaxy The image details are in AstroBin, but in short they are: MN190, Tak-EM200, 550D (modded), APT, PHD, PS, DSS 18x420s at ISO 1600 = 2h 6min Thanks for the look!
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