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Found 54 results

  1. There's something you don't see every day. I was collecting Ha with my Zuiko 50mm/Atik460 combo tonight, and this appeared on one of the 600s sub-exposures. I didn't see it, but it must have been bright - and presumably have a bit of ionised hydrogen about it (from the meteor and/or the atmosphere). This is the stacked frame with the meteor frame integrated on the stack.
  2. Hi all, after reading through SGL, i decided to get a full aperture 200mm baader film-based filter for sun observations (and doubling the theoretical observation time! ). I was wondering whether combining the solar film for removing all excess energy plus adding a standrad 2" H-Alpha filter would make sense? Or am i missing something? NOTE : NEVER POINT A SCOPE AT THE SUN WITHOUT HAVING MOUNTED AN APPROPRIATE SUN PROTECTION FILTER IT WOULD IMMEDIATELY DESTROY YOUR EYES!
  3. Yesterday's transit of Mercury in front of the Sun was almost entirely visible from the Netherlands. The transit started around noon in a perfecly clear blue sky and it stayed that way untill around 6pm, when high clouds slowly came in from the south. Unfortunately I missed the end of the event, but nonetheless I was able to watch everything non stop for hours. And it was absolutely wonderful! It started with one of the greatest views I ever saw through my 60mm h-Alpha telescope: the tiny planet's black disk just grazing the side of a prominence. While the dot was just making a dent in de solar disk, the rest of the planet's dark side was ghostly visible against the background of a very dim "halo" next to the brightest part of the prominence. An incredible sight! When the transit proceeded I started making a pastel sketch of the entire Sun's disk. Some small prominences were visible around the edge, and the northern half of the Sun was decorated whith nice filament and mildly active regions. After one hour I finished the drawing with the tiny and inky black dot of Mercury. I photographed the sketch the same evening, and used Photoshop to give it an orange hue and to correct the mirror reversed image. No further alterations were made. And this is a close-up of the same drawing, to show the tiny planet's dot more clearly:
  4. From last night, heres a pic, the elephant trunk nebula, in h-alpha through the MN190, using an atik 314L plus mono. images were 20 x 6 mins. Thanks for looking..........
  5. I have a Meade 12 inch LX200 and since I'm getting old (84) missing sleep just ain't fun anymore...Sooo I am switching to solar..I will buy a glass H-Apha same size as aperture but it seems the 12 lets in to much light or something. Am studying like crazy on all things solar but am a bit foggy about the H-Alpha...Any help out there? Thanks Ken
  6. Managed to capture some H-alpha shots of the sun just after lunch. Some lovely detail visible in the big ARs which are predominantly in the western hemisphere. Right near the eastern limb, a pair of small, very bright spots were visible. I gather that two X-class flares went off in that area around that time, so I either caught the aftermath, or the start. I stacked the images with AS!2 (using flats created with Registax and ImageJ), did wavelet processing in Registax, made the mosaic in Autostitch64, sharpened the result with Fitswork4 using deconvolution, and used curves for pseudocolour with Gimp. Full resolution here. Without pseudocolour: Full resolution here. Without deconvolution Full resolution here. Pretty chuffed with this result, especially with the 35mm aperture of the LS35. I used the TV PowerMate 2.5x and DMK21 with Firecapture. Deconvolution really adds extra sharpness.
  7. A bit grey and miserable outside this morning so here's a full disc h-alpha mosaic from May 25th to brighten things up
  8. While I was exploring the Sun disc looking for a good subject I found this small active zone next the limb, that was erupting, I decided to follow its fast closure with short captures, infact after only 10 minutes the event was ended. To build the movie then I added a second surge prominence I captured few months ago. As you can see also from the Earth scale, the sujects this time are very small events, like micro surge, spicules eruption, all watchable only on the edge of the disc with very fast capture and lower exposure respect to the filming of normal prominence. Usually they are burn and overexposed losing any details. You can also see plasma falling from the other side of the Sun. YouTube compression blur many of the details but I hope you will like it. If you enjoy the movie, click the like button or subscribe to my channel. YouTube Astro Channel
  9. My first full pano of the sun. Actually, it was a 99% pano as I missed a tiny bit of the edge with all the processed frames, but the content aware fill in Photoshop did a great job. Since it didn't have any real detail in it anyway, I didn't go back to the raw files to expand the processing region right to the edge to recover that. This is also my first time using flats for solar imaging. Why didn't I do this earlier? I only tried it this time as there were rather a lot of dust spots I couldn't clean. In order to make a flat, I did the deep sky trick of putting something over the objective. Unfortunately that killed the sensitivity, so I had to jack up to 2 second exposures and maximum gain to see anything at all. Leaving it running for some minutes I got 200 frames and that stacked into a nice dark frame. Well, almost. I was now getting hot pixels too. My fix for that was using the dust and scratches filter to remove them, tuned so as not to remove the actual dust spots which I wanted to keep! The flats also got rid of the stripe optical interference pattern I got at times. Overall, this does give more detail than a single shot full disc capture. But it's not half a lot more work! I used 11 frames in order to fit it. Kit: PST with Hyperion eyepiece projection into DMK41. No idea what image scale is, but about 3 frames will get me across the sun with overlap.
  10. I've just bought a Daystar Solar Scout 60mm DS for H-alpha imaging of the Sun. I am now looking for a suitable camera to use with it. I know I could use my DSLR, but for H-alpha that is not going to give best results, so am looking for a dedicated monochrome imaging camera. I have identified the ZWO ASI178MM as a possibility that fits my budget and has a large enough (I think) sensor to image the entire Solar disc if I use a 0.5 focal reducer which will give me a total focal length of 465 mm. Does anyone have any experience of this camera in this application, or know if it will be suitable? I know it does not have an IR blocking filter, which I understand is an advantage for H-alpha. The spec is available here: https://www.rothervalleyoptics.co.uk/zwo-asi178mm-usb-30-monochrome-cmos-camera.html Thanks Mandy
  11. Dear all, as suggested by Hughsie, here's my pastel sketch my contribution to the solar imaging challenge. Telescope: Lunt LS50THaB600PT Eyepiece: Celestron X-Cel 10mm Date & Time: May 29th, 2019 / 1630-1700 CEST Location: home terrace, Dusseldorf region, Germany Technique: reddish Koh-i-Noor Toison d'Or pastels and pastel pens on greyish Canson Mi-Teintes pastel paper Like all of my astronomical sketches , I did this one directly at the eyepiece. The picture of the sketch is taken with my smartphone and just cropped. Clear (and sunny) skies! Achim Size: 24 x 32 cm
  12. From the album: Sun

    Close up of prominence at around 4 o'clock of the disc.
  13. GlassWalker

    Sun 20120820 Ha

    From the album: Sun

  14. GlassWalker

    Sun 20120729 Ha

    From the album: Sun

    Lots of stuff going on. The white bit under the lower left sunspot appeared as I was imaging over the course of minutes, and disappeared not long after.
  15. From the album: DSO, Nebula, Galaxies, Comets etc

    M1 The Crab Nebula 30.12.2016 Taken using Atik 314L monochrome CCD and Celestron 8SE SCT telescope 10 x 300 seconds H-alpha, 10 x 300 seconds OIII and 10 x 300 second darks Narrowband data assigned to colour channels to give a bi-colour image and lightly processed in PS

    © vicky050373

  16. H-alpha solar sketch! Also put up my 90mm refractor beside my LS50. Date : 3/4/17. Time: 3:45 p.m. IST. Nothing much happening about prominances and filaments. AR 12644 still putting up a nice show. AR12645 is comparatively quiet, but spotted micro flare coming out of it during session. Looks like AR12647 and 12648 are developing! Clear skies!
  17. A lovely morning here in St Neots, Cambridgeshire: a light breeze only, thin cloud keeping away from the sun, equipment working perfectly. The only problem is the seeing. It's not the usual "wobbly" sort, rather it seems to make everything slightly blurred. Ah, well, can't complain... This is my longest animation so far; 1 hour 20 minutes in 85 frames. I hadn't bargained on the image getting brighter as the sun rose higher, so this one start dark and gets brighter over the 85 frames. I was lucky to catch it at a particularly active time I think. Gotta love that H-A action! The last animation was slightly jerky so this time I reduced recording time from a minute to 45 seconds and tried to record data back to back with no gaps, which was not always possible, as the unguided scope needs regular correction. Still, it's come out much smoother than previously. Iain
  18. Heres one from the other night, it nearly escaped me this part of the season, due to its very awkward position in the sky, and the presence of looming light pollution. Had some issues with my PA so, started imaging again on the shorter focal length w/o zenithstar 70ED, so was looking for something large enough to be worthy of the imaging through the Williams, so opted for this large PN in Lynx, Jones emberson 1. This was a stack of 15 x 6 mins, with a 7nm h-alpha filter.........
  19. The cocoon nebula, IC 63 and IC 59, IC 1795, NGC 7380, M33, NGC 7023, NGC 6946. All images were taken with the William optics zenithstar 70ED with focal reducer, with 7nm h-alpha filter except M33 and NGC 7023 which didn't have a filter. NGC 6946 was taken with the skywatcher MN190, with no filter.
  20. My 2nd attempt at a mosaic, although I overcooked it a little but I'm not going to reprocess all the frames again in an attempt to fix it! I want more detail...
  21. Today's sun... all images are 100% crops from DMK41. Best 10% of 1000+ frames. Thought I'd have a go at the prominences close up. Far from easy... since I don't have any workable barlows at the moment, I decided to use eyepiece projection with a Hyperion to T-mount to DSLR to C-mount... this was my first capture of the prominences around 4 o'clock of the disc. I blew the surface here... Here I moved over to the prominences around 8 o'clock of the disc. I fiddled a bit more with the video settings and managed to get both prominences and surface detail at the same time. Side note: I find when I stick more glass in the chain, I can get a diagonal stripe appearing near the centre of the image. It seems to be due to the optical chain, but I'm at a loss as to what causes it, or what could be done to eliminate it. Now I'm wondering if I can get better detail out of a regular PST (single stack), or would there be better gains from going DS or a stage 1 mod to bigger aperture scope...
  22. From the album: Solar Images

    Stacked and processed image of AR12529 taken using William Optics FLT-110 refractor, 1.25" Lunt Herschel Wedge, Baader 7nm H-alpha filter, Celestron X-Cel LX 2 x barlow and QHY5L-II Monochrome planetary camera. 1000 frame AVI processed through PIPP to select the best 50%, then through RegiStax6 to stack and add wavelets.

    © vicky050373

  23. From the album: Sun

    ISS passing across the sun, moving left to right.
  24. Hi all, Here's a full disc mosaic taken this afternoon. A fairly quiet Sun at the moment although there was a bright northwestern prom visible and a lovely southeastern filament, rotating into view. Mosaic is made up of 20 panes, hand stitched together. Best regards, Pete
  25. NGC 7635 The Bubble Nebula in Cassiopeia Imaged using Atik 314L monochrome CCD camera and William Optics FLT-110 refractor on NEQ6 Pro SynScan mount 10 x 300 second subs in H-alpha
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