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CKemu

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Everything posted by CKemu

  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 a
  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
  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 minu
  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 cl
  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 tow
  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 ov
  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" filt
  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 cap
  16. Your first galaxy is a cracking shot! Brilliant given the sky conditions and one to be proud of! Nice work, here's to many more galaxies and clear skies!
  17. HaRGB - 20x720s in each channel. Shot between the 24th and 29th with technical gremlins, haze and my neighbours constantly on halogen lights and work. Was rather pleasant shooting this as I got to see a fair number of shooting stars, the space station and that pesky Moon rise later and later over the water. Shot with my Skywatcher 100ED, ATIK414ex, Baader HaRGB filters on the NEQ6, guiding done through ASI120mm camera, off-axis though PHD2 with an RMS of 0.7-0.9". Thanks for looking!
  18. Well lets just say my focus was a little off with the green channel, because...well not actually sure, this normally works fine, they're parfocal(ish) and I've never had this issue before, I shot in order of R,G,B - R,B in focus, G not...so pass on that. Also my neighbourhood has gained two new citizens and they love their new shiny outdoor lights illuminating their garden. Those gradients are grim!
  19. 1: I shall have to check my guiding set up, it's off-axis using PHD2/ASI120mm for the camera. From my calculations I have a roughly 2.41" per pixel scale on the ATIK414ex and my RMS last night was 0.58-0.70", which being less than half I would say that is well within bounds, but there was a few rough patches, possibly caused by breeze or in one case a dog. Guiding updates where every 500ms - perhaps to short? Seeing interfering with the guide. Graph looks a little rough, RA being noisy, with DEC showing more "pattern", though equally nothing that stands out over the entire duration of the
  20. This is a "RAW" stack of 6*720s images in the R channel using my Esprit 100ED and ATIK414ex, taken between 21:40 and 23:00 before the Moon started to blot the sky out. Hoping with several clear night forecast to build upon this with a set of 20 in each channel. I'm not entirely sure what to make of the stars though, in this project and a few others the stars aren't "smooth", not sure if it's me being OCD about tiny details, or an actual problem. When shooting with my LX90 8" and this camera/filter config, the stars where smooth gradients, however with the smaller stars in this image, ther
  21. Lunar Phases by Chris Kennedy, on Flickr Click image to see the video, and watch full screen for some of those details to pop. Over several mornings I've shot large mosaics of the Moon, with steadily decreasing seeing conditions. Despite breaking my body clock and surviving on naps, this has been a worthwhile endevour as I've always wanted to show libration, wasn't sure I'd manage it with so few data points, but happily this 4K video (well stop frame animation) shows the wobble nicely and the ever changing surface details. All shot through my LX90 8" SCT with the ZWO ASI290mm came
  22. 73 Percent Moon (Waning) by Chris Kennedy, on Flickr Shot this through mist and pretty poor conditions around 3:30am this morning (had to let it get past some trees), worth it and really enjoying watching some of the craters transform as the shadows grow ever longer. Managed three nights, so had to put together a GIF, admittedly it's not very smooth as you've got a 99.4 waxing Moon, a 92% waning Moon and a 73% waning Moon all in the mix.
  23. 92 Percent Waning Moon by Chris Kennedy, on Flickr That big old Moon is getting in the way of my deep sky work (one day M104, one day!), so decided to set my telescope up at the bar I run to allow people to check out the Moon, and after looking up, I braced the sea air and strong breeze to put together this 7000x7000 mosaic of the Moon with my LX90 8" SCT and ZWO ASI290mm. Typically the new Moon phase looks to be clouded out, might have more luck capturing every phase of the Moon and making an animation!
  24. 99 Percent Moon by Chris Kennedy, on Flickr Shot last night using my Meade LX90 8" SCT with the ZWO ASI290mm camera - was especially fresh last night with a strong cold SW wind, which made the waves on the beach 100m down the road sound very soothing as I did my best to keep warm taking 38x15s videos @ 80FPS - best 200 staked and then stitched using Microsoft ICE and then a sharpen and levels applied in PS. Been ages since I've shot the Moon, as normally I am waiting for it to go away!
  25. Thanks for that, flats I'd considered for dust etc, but removing the vertical stripes I'd not considered, need to figure out how to take a solar flat, but otherwise this does seem like a reasonable solution. I am surprised at the "intensity" of the column response every other line - seems excessive/abnormal, so still waiting upon ZWO to make a response on their support forum.
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