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CKemu

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About CKemu

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    Star Forming

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    Cornwall
  1. The Sun isn't doing much currently, but there's a few proms and I was hoping to see something of the potential active region rotating in to view. Got the scope out and focused up, no haze in the sky and conditions seem favourable. However the view through the scope was poor, little granulation showing and despite knowing where the optimal tuning is on the scope, I went through every position just to double check and still no hint of the proms visually. (Using GONG as my reference to find them). Plugged in the camera, focused up and whilst I can see a smattering of detail on the surface at super low contrast, proms are not showing up at all, and increasing the exposure just creates a bigger and bigger halo around the sun washing out any potential proms. I did a quick Google, and there's talk of this phenomenon occurring if the "ITF" is rusted. I have seen a few pictures with what looks like absolutely obvious rust, however upon disassembling mine - I am unsure, the filter is reflective (reflects my face back at me) and if I point it at the grass, I can see the world in shades of red. I will say the surface has a milky and slightly green look to it, but not sure ..any thoughts would be greatly appreciated.
  2. Absolutely stunning results from you both, and it really is amazing that a mag 15 nova can be captured with reasonably small scopes from galaxies 60 million light years away! Fantastic work! Glad to see other peoples shots of this nova.
  3. Being a furloughed bar manager has it's benefits. Couple of experiments in processing and trying to image less that optimally positioned objects has been interesting. Bi-colour heart nebula section: 15 x 1200s H-alpha 12 x 1800s OIII Honestly wish I had more data on this one, and a much better OIII signal, but learning new techniques and fighting 25 mph gusts of wind kept data levels low on this one. Fish Head Nebula: Ha 15x600s OIII 17x600s SII 8x600s It's been fun capturing these and processing the data, so much to learn, but starting to get my stars under control now.
  4. Ahh, sorry - I should have mentioned the scope in the post - I used the Esprit 100ED - so this is the view with a 550 mm focal length. Good luck giving it a go and clear skies!
  5. SN2020zqv - discovered by the Zwicky Transient Facility at the Palomar Observatory in California on the 31st of March this year. This is my photograph of the event, taken tonight. I have marked the nova in the main image and the zoomed insert. (Host galaxy is 4568, nova is around mag 15) Image is 14x600s exposures in Red using my ATIK414ex. Conditions where poor, cloud and 25 mph gusts of wind made tracking a pain. Also my ATIK414ex has developed a grim flaw in it's imaging sensor, so I cropped that out.
  6. Camera is an ATIK 414ex mono Two weeks ago I had the camera and scope out for photographing the Fish head nebula, and managed a successful session with no issues. Past few nights I have been photographing the Heart Nebula, and noticed that the image had a few curved black lines through it, they morphed over time, but eventually vanished. However I am noticing that I've got this pattern to the right of the image, that whilst the noise varies, you can see it's leaving a distinct impression on the image. This is a single 1 second sub to show the noise. Though it shows up on the 20-30 minute exposures I have been using, the white in the right third of the image is just a star. Any thoughts as to what could cause this change in behaviour? Nothing about my configuration has changed compared to the last imaging sessions. Really hoping not, but suspect the camera has developed a fault.
  7. Rather than making a new thread, I thought I'd drop this here with the original images. Ended up playing with Star Net++ and Photoshop to remove all the stars from the image. I love the fact that your focus is now solely drawn to the nebula. Why I have only just heard of Star Net now is beyond me. But glad I have.
  8. Lovely image, it's been my target for the past few nights! Impressed you managed to keep the core with 4 minute subs, or did you have shorter subs to?
  9. I use a couple of tricks: 1) I have about a 25-30% overlap, to ensure that Photoshop's photomerge or Microsofts' Image Composite Editor (ICE) can stitch. 2) If using PS, I make sure it's set to "reposition", so it doesn't distort the image in any way, and blending is set to on. 3) Each panel I "calibrate", so if P1 is my reference, then when I stack P2, I check that the same points between images (normally background space near a recognizable star formation) have the same grey value, so if P1 reads 44,44,44 then the same region in the overlap on P2 should also read 44,44,44 - or very close, if not, I go back to DSS, darken/brighten accordingly and resave the image. I also recommend if you are doing a colour image, build your colour composites after the above process, and then stitch the colour raw images together, this helps with overall alignment.
  10. Six hours later and I managed to grab two more panels to give me the running man, this is by far the largest image I have produced (in terms of x*y dimensions). Perhaps to balance the image a bit better, I should do a run that fills out the space at the top. Though that may be a decade from now with how the weather goes.
  11. It has been six months since I last used the telescope! Urghh that sentence is heart wrenching, but between the awful wet weather, running a bar (this time of year, it's only open evenings) and moving house - I simply haven't had chance. It was hard enough remembering how to configure the telescope, and my guiding was "SLOPPY", 0.8"-1.2" for long periods, and then periods of 2"-3", so those stars aren't perfect - but honestly the sheer joy of getting back out there and imaging overrides the usual stress about perfection, and went with whatever came my way. My new location is more "in town", it's not bad, but it's not as good as the empty beach I used to image from, that and my Southern window is smaller, so I expect to image more "Northern" objects over the next year or so. Anyhow this is my first serious crack at M42, it was one of the first things I ever looked at, and had a bash at imaging, but despite it being the ever popular winter target, I've never really bothered with it in the time since,. This image is made from four panels, imaged over three nights. Each panel being 12 x 300 s in R, G, B with no flats/bias or other faff, just straight up, 12 hours of data, stacked in DSS, and combined/stitched in Photoshop, and tonight might be clear to, so going to slew left and capture in that direction. I left the core blown out, I did shoot short exposures for the trapezium, but I confess, I like it blown out, it gives it a proper sense of brightness to me. Thank you for looking, if it happens to be clear tonight, I shall post my results from that in this thread.
  12. Thanks for that. I use the NEQ6 with PHD2 and the ASI120mm as a OAG gives me a range of 0.58" on good nights and with stronger wind conditions, I get up to 1.2", I average around 0.7", so that's within threshold. I just ran it through https://astronomy.tools/calculators/ccd_suitability to, and that gives me a Green in "OK" and "poor" seeing, and reasonable in "Good".
  13. Hi! So currently running an ATIK 414ex with my Esprit 100ED and Meade LX90 8", and mostly keeping my deep sky work to the Esprit. The ATIK 414ex has a resolution of 1392x1040 with 6.45um pixels, and it's a great camera, but I've had interest in making DSO images that are of a more printable resolution, and 1.44mp isn't really going to cut it. Now my budget won't stretch far, but I am looking at the ATIK 490ex, 3380x2704 resolution with 3.69um pixels (9.1mp, which is closer to something printable). I am curious as to how the small pixel size will effect overall resolution, I get the overall gist that shorter FL's do better with smaller pixels..but looking for the hive mind to help me out here. How will image quality be affected with the Esprit, would it be worth holding on to the 414ex for the Meade 8" setup? Any help and thoughts will be greatly appreciated.
  14. First time seeing and then imaging this object. Given the weather I decided to try and do the RGB in one night, so this is made from 180s x 60 (20 per channel). One thing I didn't take in to consideration, was shooting the blue when it got in to the muck on the horizon, so the data there got a little fuzzier. Wind was also a factor for once, I've found with the Esprit that wind speeds can be quite high and tracking isn't too bad, but every now and then (couple of minutes apart), I'd get a good 30mph gust. I am still trying to find methods for star reduction, this has had a "minimum" filter applied to the tars to reduce some of the stretch/bloat, and whilst smaller stars would be nice, I kind of enjoy the overall brightness and richness of the star field, it's extremely rare I shoot this directly in to the Milky Way.. Otherwise, very little processing, just a stretch and pretty much done.
  15. Messier 13 imaged with my Esprit 100ED and ATIK414ex using Baader RGB filters (30x240s in each channel). I have Bortle class 4 skies here, but I also have neighbours who love two VERY bright halogen lights, a street lamp and of course the Moon was about last night and the night before. NGC6207 and IC4617 are clearly visable, despite the insane distance involved with IC4617, which is very pleasing, as I've only ever tackled this object with my LX90 8" SCT. I am also enjoying "find the galaxies", and noticed a small cluster of them mid right, not looked them up yet, but always a thrill to capture more than you bargained for.
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