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Showing content with the highest reputation on 27/10/19 in all areas

  1. Woke (too) early this morning to find it clear as the RASA was still set-up from last evenings efforts I decided to try a few targets. IC405 is the only one processed at the moment. The image comprises 10x 120s subs, gain 122 offset 30 on the ASI294 MC Pro. I can see that at some stage I've upset the PA but still like the image. CEM60 Standard mount, processed in PI no calibration frames. Process after integration: ABE, Background neutralisation, colour calibration, saturation and histogram transformation - saved as 16 bit tiff and 8 bit jpg. More to follow if I can stay awake...
    12 points
  2. I managed to finish processing one more target. I'm sometimes grateful that we have some cloudy weather because I was starting to feel that I will never manage to finish processing my data Well as you all probably know this is the Elephant's Trunk nebula. I started shooting it quite a while ago, in April, with a 130PDS and I continued with the AT106 last month and this month. I managed to gather a total of 19 hours and 40 minutes worth of data. 76x300sec Ha with the 130pds and the rest of 9x600sec Ha, 36x600 Oiii and 35x600sec Sii with the AT106 I hope you like it. CC most welcome Emil
    9 points
  3. I think this is only about my third go at LRGB - Managed to finally get my guiding sorted the other night as well, the first few subs still had trailing, so I offset the balance and voila! Perfect subs for the rest of the night. This time I followed the Light Vortex stacking guide, and did drizzle stack, so apologies for the size of the image! This is 11X5min L and 7X5min each of RGB. I think I will revisit sometime as I don't think the red channel is properly aligned - as the RGB was not drizzle aligned I could not get Pixinsight to register the RGB data against the L until I rescaled the RGB to the size of the L, thought it would just have done this itself? Anyway, any comments etc always taken, have I gone to far/not far enough with any of it....
    8 points
  4. I've been banging away at Sh2-101, the Tulip Nebula in Cygnus, for the last few clear nights shaking down my new CEM40 mount. Initially I imaged this with my Tak FSQ85 but I wanted to see how the mount handled my TS130 Super Apo. Focal length is still only 860mm and the whole rig is 12kg (26.5lbs) i.e. at 2/3rds of the rated (usually interpreted as for visual) payload capacity so this wasn't pushing the mount too hard but I didn't lose a sub to bad guiding over the three nights I captured this data. My processing skills are coming back slowly but it feels I've still got a long way to go... mostly processed in PixInsight, which I am still learning, with some tweakery in PS. On the HaRGB version I ended up adding the Ha as a luminance layer partly to increase contrast but partly to make the nebula pinker (didn't think I'd ever be doing that!) but the original deep red just didn't look right to me for this target... Kit Mount: CEM40; Camera: Atik 460ex; Filters: Atik EFW2 with unmounted Astrodons (Ha 5nm); Guiding: Atik OAG, QHY 5II Data Ha: 18 x 600s; RGB: 40 x 180s of each channel for a total integration time of 9 hours. No calibrations frames at all, by the way. The low noise of the Atik 460 means that I could get away with just using Cosmetic Correction in PI without darks, vignetting wasn't a problem (no field correction in this process) and my bias frames are over-correcting for reasons I haven't fathomed yet! Anyway, Ha, RGB, and HaRGB versions and just for fun an Ha/OIII/SII version with the Ha data from the TS130 used as luminance over the colour process from the FSQ85 data. Must admit that I like the RGB version as it shows off the lovely mix of blue and red stars. The nebula is pretty bright in Ha and the HaRGB version kinda washes out the star field... As usual comments and advice welcome. Thanks for looking and clear skies.
    7 points
  5. sunny today here in south wales, seeing fair a bit fazey but we had a good frost early, theres a nice bigish prom on the upper off going limb if you get chance. kit starwave 102f11,quatk, asi 120mc. thanks for looking. clear skys . charl prom upper off going limb quite bright. proms lower off going limb. there are other small proms.
    6 points
  6. Few more from first light session. Process change: Initial process for these were APP to integration then PI for colour work. Horse head (IC434) 5x 120s M42 10x30s 10x60s 6x120s Rosette ngc4422 5x120s
    6 points
  7. The bright erratic subgaint variable star Gamma Cassiopeia, is encircled by gaseous material that is projected by the stars rapid rotation. IC59 and IC63 are reflection nebulae, although IC63 is considered to be an emission reflection nebula. They are each of very low surface brightness and of a notable challenge for observers. IC63 the closer of the two nebula to the star, is considered to be the brighter component. Cassiopeia is very favourably positioned presently in an autumn evening sky and on Saturday night I was able to get to a dark sky location and have a go at these. The sky was mostly clear, there was a very sharp cold wind, four winter layers felt as though they were not near enough. Throughout the session, I returned to Gamma Cas trying various eyepieces, methods. Not untypical of a very faint reflection nebula, much was also washed out by the brightness of this star (a radius 14 times that of our Sun and 55, 000 times more luminous). I was using my 14" F4.6 dobsonian and to begin used a 21mm Ethos x76. I then switched to a TV20mm Plossl to narrow the field and thus reduce the glare, I then felt that I was gaining something of IC63, averted vision assisted. When I say something it was a comet shaped feature that was very dim, vaguely discernable after repeatedly going over the same area. I felt that I could make out an arc shape, but averted imagination might be playing games. At least this evening with the wind chill there was no dew building up and I was not tired, but it proved to be a very hard observation. I cannot say that I had any success with IC59 a pure reflection nebula. A UHC might have been useful to for IC63 but I did not use a filter. Other eyepieces used were a 25mm Plossl and 10mm Delos with no luck, I also tried with and without a Paracorr for a little more contrast, so the little 20mm Plossl scored again, just as it had with the Horse Head Nebula. After this and with an OIII in place, the Pacman was positively bright and shapley, over towards Cygnus and the Veil bright and delicate. Encountering the North America and Pelican with ease, I drifted along for 68 cygni and I am certain I encountered some of the nebulosity around sh2-119, a large diffuse nebula. Much more followed before the cold and a period of cloud (which as per usual had swept away by the time I had loaded the car) determined that I pack up. Don't expect much, however It would be interesting to hear if anyone else has a go at the Ghost of Cassiopeia, on a dark transparent night. Here is an image borrowed from the internet by Ken Crawford. Second download is a sketch borrowed from Cloudy Nights using a 17" dob, providing some indication to a visual reference although at best will be vague in comparison. https://www.cloudynights.com/topic/218257-ghost-nebulae-around-gamma-cas/#entry2792504 ghost nebulae around gamma CAS - Sketching - Cloudy Nights.html
    5 points
  8. Fotka popełniona w Bystrem w Bieszczadach podczas zlotu PTMA Katowice 26.10.2019 składa się na nią 180x60s and 80 x 10s , ZWO ASI 294 MC Pro, TS APO 65Q, heq5 PRO synscan
    5 points
  9. The postman didn't bring it, I collected it. Having recently sold my Lukehurst dob due to it being too heavy and frankly, not being used. I am now the proud owner of an OOUK 10" F6.3 1/10th dob. It is so much lighter and will most definitely be used considerably more than the DL did. Hopefully first light will be SGLSP next weekend, fingers crossed.
    5 points
  10. Just a couple of shots from earlier this evening Milky way in it's full glory straight off the camera with no processing
    5 points
  11. In my quest to become a real solar imager I have added a Baader 1:1.25 GPC to my 6" f/8 PST mods. This morning [Sunday 27th] before it started raining I captured some videos with and without the GPC. Here's the result of a couple of swift bits of processing: The image scale is the clue to whether the GPC was present.
    4 points
  12. I wasn't going to post this as I think the best images are already here but that's not the spirit, is it ? Myself and two friends walked down to the fishing ponds at Kelling last month and had a go at the Milky Way. Surprisingly non of us got in the way of the others ! The image was processed as four distinct areas. The Milky Way sky, of course, the water, trees and the yellow bush to the right. Trying to process the image in one sweep messed some areas up as others improved. The yellow bush is blurred due to a slight breeze that was blowing and wouldn't tighten up ! The trees had no obvious form to them so they were lightened a bit to show what they were in fact trees ! 10 images shot at 20 seconds each f1.8 ISO 3200 ( not 1600 as I've said elsewhere ! ) on a 14mm Sigma and Nikon Z6. Even at those exposures there was black clipping in the bottom right corner but it didn't matter in the end. All put into my favourite stacking software, Sequator We have two bites at the night sky because much to my surprise, the Milky Way seems to show up in the pond too, Dave.
    4 points
  13. ........ undo the mount clamps after servicing the guide camera or you'll soon discover that it hasn't slewed anywhere - which just might explain the failed platesolve .........
    4 points
  14. Site is a hive of activity as the evening draws in
    4 points
  15. If you decide to split ... I might be interested in the socks
    4 points
  16. Update: went out last night and successfully polar aligned with sharpcap and 50mm finder Probably too short of a focal length but it will do for now Here's an image of how accurate I could get it
    4 points
  17. HI Tony It isn't fully finished yet but will be in the next release. It supports LRGB from mono rather than OSC. I'm still working on a few aspects as it has meant a fairly complete redesign of the way I handle the stacks as you might imagine. L, R, G and B subs can be added in any order, as they come in, and Jocular will update the relevant stacks so colour balance will always be consistent even if the noise in any one of the bands is higher than the others. Internally all is done in LAB space which means getting the live aspect working responsively has been a challenge. Its ~ 200ms per update when using colour on my 2015 MacBook Air for the small Lodestar chip which is just about OK. For instance, any changes to the luminosity channel that come from e.g. moving the B or W points also take this amount of time due to the need to go through LAB space. Beforehand those changes took ~30ms so it is quite a hit, although if the incoming subs are all L then it is as fast as before. The idea is to really simplify the handling of colour. At present there are just 3 controls: saturation, colour stretch and colour binning. No messing around with histograms! One further integration I'd like to do before release is with Nebulosity, so that hitting a single control on Jocular results in a scripted capture of LRGB i.e. one-shot LRGB. At present I'm using SLL to control the filter wheel and captures and it works by simply naming the channels red, green, blue which Jocular then interprets as expected. Narrowband will come later still.... Here's a recent example. Best Martin
    4 points
  18. Remote wifi set up - laptop inside - stick pc outside - c11 on g11 - hyperstar - asi178mm - pc focus control. 8 sec frames f 1.9. A chilly evening kicked off great with live view of meteor under Polaris during mount alignment. Came streaking across Polemaster cam east to west. The seeing was quite awful yesterday for such a dark night FWHM 6 to 6.5. Focus was challenge but hey I was set up. Viewed vesta and took 8 sec image then came back 30 min later to get distance asteroid traveled. Below is 30 min of vesta travel. Viewed Pegasus cluster and grabbed 8 sec frames rgb. Was quite dazzling with poor seeing when I bumped up exposure. Live stacked 20 frames each channel in sharpcap. Has good number of little blue stars around was glad to see I captured some. Really like astronomik deep sky filters. Also viewed ngc 1600 and other small targets, before fogging up. Wish was better system to swap filters on hyperstar. Right now I use built in magnetic slide so have to swap filters one at a time. This is a pain because have dew shield on that snugs the usb cam cord under. So to change filters I carefully slide off dew shield, carefully slide out filter, uncrew used filter, screw in new filter, carefully replace everything, then its back inside in warmth to re-focus remote view / image again. Why most nights I mostly stick with one filter.
    4 points
  19. The fourth and final stargazing report from my summer vacation on Benguerra Island in Mozambique. Starting at 1:30am and finishing at sunrise, I covered a lot of the central Milky Way favourites as well as exploring the galaxies of Fornax and Sculptor, as well as numerous globular clusters and nebulae. (and a mid July view of M42!) I finished with an attempt to spot some structure in the HST. The report is on the link: http://alpha-lyrae.co.uk/2019/10/27/an-early-morning-stargazing-session-on-benguerra-island/ I set up the camera taking a lot of pics while I stargazed. Guess I was switching eyepieces at this moment! Feedback always appreciated. Hope you enjoy it.
    3 points
  20. Well I made the door but not fitted yet. In between the amazing rugby and a Halloween party it's been a busy weekend.......... I'm supposed to be Georgie out of the film It. However I seem to resemble more Brian Cox after a weekend bender.
    3 points
  21. Hi Does anyone have any hints on how best to process this, currently stacked, basic stretch and curves in PI. Spent a few hours hours on it today but i feel its out of focus and noisy however i am not used to this camera as yet so not so sure what i ought to be capable of taken last night with TS 65 Quad, ZWO 183C, aprox 2 hours of subs at 100secs
    3 points
  22. Actually--one final tweak--a reduction in saturation
    3 points
  23. First light session with a Celestron RASA 8, Baader NB-1 filter, ASI294MC Pro. Guided with PHD2 on an iOptron CEM60 standard mount. Subs: 8 x 120s Processing via APP (to integration) then PI for colour work
    3 points
  24. Star trails at sycamore gap, located along Hadrian’s wall. Equipment canon 6d, samyang 14mm lens and a tri pod. Thanks for looking.
    2 points
  25. Shot his over the full moon with poor seeing. This is 400 each, Ha SII and OIII, 40 second exposures. 11” RASA with ASI1600. Baader f2 filters. When I was finished processing I notice my focus was off, but it didn’t come out too bad. CC welcome.
    2 points
  26. You know you take it to the dechetterie and they take it somewhere else and burn it on a bonfire, cut out the middle man. Less carbon footprint too. saves driving that AMG all over France
    2 points
  27. That’s what a Merc is for. You got a tow hook, put a plow on the back and help your farmer neighbour.
    2 points
  28. Time for a little update... My sons came to visit the other week, complete disaster on the weather front. Rain and clouds most days with very short partial breaks in the cloud, tempting us with half a dozen stars before closing in again. Uncovered a few minor issues, worked most of them, but little movement forward. Fighting .Net problems with Windows 10 "Professional" but TheSkyX looks really good. Evenything now working through it, except the dome (.Net.. arrrgh!!) driver. Still to resonve. But good news, Google Earth has updated and captured the domes !! Oh, happy days... Gordon.
    2 points
  29. Only 10 minutes on that HH!!! Brilliant!
    2 points
  30. Darn it (Darn? Socks? .... I'll get me coat)
    2 points
  31. I went out at 6am this last Saturday (19th October) to see what wildlife I might find, but it was still quite dark so I paused in the graveyard of the church of St Nicholas here in sleepy Cuddington and took a few photos with a 10mm Samyang lens on a Canon 600D. Single exposure of 20 seconds at ISO800 on a static tripod.
    2 points
  32. Yes I agree. I only believe the forecast nearer the time when 2 or more websites are saying the same. Ironically the Met Office seems to me to be the least reliable. Carole
    2 points
  33. IMHO most people could care less about astronomy and we should adjust our expectations accordingly, unfortunately. I also could care less what people think about astronomy! I just love to observe. @domstar no need for negative feelings and congrats for getting out observing!
    2 points
  34. Sounds like a smoke detector would be a helpful addition for those intending to do remote solar imaging. As would a firefighting team on standby!
    2 points
  35. Hi everyone Disappointed with this. I think that unless you do hours on end night after night, this is never going to reveal much. But would you just look at those blue stars:) Anyway, thanks for looking and do please post your version if you've had a go; can't find much on this at this sort of scale. 700d: 2h @ ISO800
    2 points
  36. Two things strike me. 1) The glare/sunglasses story is absolute tosh and any visit to the neighbour's property would have confirmed this. It's a dome. It can, therefore, reflect very little light directly towards the eyes of an observer since its shape will cause it to disperse its reflected light. The sunglasses chap is a fruit cake. 2) The fact that it is unusual is considered grounds for removing it. Hey guys and gals, don't be unusual. Be just the same as everyone else. Garden gnomes a go-go. Olly
    2 points
  37. Ah I see now, thanks. I've just looked. I can change the email address and login details to a dummy one but unfortunately all my personal details, address, phone number remain on there so that's a no no.. Price reduced to reflect this fact. The card will come with current OS of Stellarmate 1.4.4. If they update it in the foreseeable future I can log on, download and forward. I'm an active member on here every day. I should imagine the majority of development will continue on the new RPi4 so not sure how many updates the 3 will get. £25. That's still a bargain. Cheaper than a Pi3 on it's own and you get to try out SM for free.
    2 points
  38. Thanks all for input on the topic. Luckily, I'm not trying to be very precise about all of that - just wanted approximation to see if there would be cooling with about 40K delta T. From above two approaches - energy conservation / isothermal process and second one - adiabatic expansion, I think safe bet is that there will be some cooling in range of 8K to 200K delta T (although I'm well aware that this second figure is very unlikely). It did show however that this topic is rather complicated and that there is no single formula that can be used to predict what will happen with good accuracy - it actually needs a bit more complicated simulation to get close. I think it is easier to actually test it out. For all interested, here is what I had in mind: I'll probably move to a new house (yet to be built - currently in phase of project and getting required permits) on piece of land that I purchased recently (yes there will be obsy too ) - and there is a lot of fruit there. That area is known for fruit production. Although you can buy frozen fruits and vegetables in supermarket at decent prices and there is no real commercial incentive to do that sort of thing - I fancied a way to do quick/deep freeze in home that does not involve expensive equipment and dangerous materials (like handling liquid nitrogen and such) - so I came up with above idea - use compressed air to quickly lower temperature. Grow your own food kind of approach (and store it for the winter). Had no idea if it would actually work, but recently I stumbled across these: (I'm posting links to commercial items - but have no intention of promoting them in any way. If it is deemed against SGL policy - please remove them) https://www.minidive.com/en/ And also a kick starter project that seems to offer similar thing: Both of them have 0.5L bottles (that can be filled with hand pump up to 200 atm pressure). That is why I used those figure in above calculations to see if it would work. In any case - I fancy idea of small scuba units which I can use on holidays , and if I could use it to do above as well - that would be nice (I have not found small pressure tanks anywhere else).
    2 points
  39. I was out at night on holiday at the Isle of Wight enjoying the dark sky when a big grunting badger came past me, oblivious to my presence it seemed. Scared the socks off me though! I`ve got a bat detector which comes in handy to help decide if I am being buzzed by a bat instead of some kind of giant flying nocturnal insect with fangs. The worst thing for me back home is when the cat decides to jump in the observatory half way through a crucial observation and takes great delight walking on the laptop and tripping over the cables.
    2 points
  40. Good night mukkas?...who's got the worst head?..
    2 points
  41. Up at 8am to rather stormy skies. Lots of broken cloud last night but the wind picked up to probably double that forecast (30mph gusts) I managed to set the scope up and have a quick view of Saturn on the horizon but noticed my dew heaters weren't working. By the time I'd been to Mike's and affected a repair the wind had become stronger and lots of cloud had moved in. Wind still gusty this morning but set to drop later. Cold weather moving in for tonight so all should be good. On with breakfast!
    2 points
  42. The last chappie sounds a bit arrogant to me. The others sound unimpressed. Well done for trying though. Carole
    2 points
  43. I can live with screaming hedgehogs, barking deer and contralto foxes. The flying foxes just bounce of my duvet hood over an oiled wool, bobble hat. The salopettes even take care of rabid, marauding cats of a winter's night. It's the Great White Sharks leaping clear of the pond that unnerve me. Quite honestly, that's the only reason I built a two story observatory...
    2 points
  44. Well to be fair to my little aerial friend, he has never given me reason to think he's going to hit me. I trust his "skills" enough to not be concerned.
    2 points
  45. Thanks--I did not know this. I will have to give this some thought. Meamwhile, I tried bining the data 2x2 in software. Here is the image. I like it better--though not sure its due to the binning....I processed a bit differently.
    2 points
  46. IMO it is worth reading a lot of member's views with each type of scope before you make a decision! If you intend to do a lot of imaging from a fixed observatory, then looking at the websites of the planetary imaging experts, they tend to use the largest SCT they can get, eg a C9.25, and C11 or a C14. Personally, after four years with a 180 Mak, cooling down and dewing issues have not been a problem for me, particularly after thermally stabilising the scope. Mine will perform to its physical limit ( Airy disc 0.7 arcsec) and show eg surface detail on Ganymede. For me, any improvement would simply be from adding more inches to the aperture - a case of DAF (the dreaded aperture fever). Chris
    2 points
  47. Another effort, on 24 Oct. This time I made a stack of 100 images, which gives a slightly sharper result and (on the imaging laptop) I could see four moons and no interfering stars. Moons identified with the Sky & Telescope tool. Image non-inverted. Taken with CPC800, ASI224MC (and flip mirror).
    2 points
  48. Here's my not very good image, with the identifiable blobs marked. This image is the 'right' way up, non-reversed. Note that with a SCT if the camera is not looking through a diagonal the image will not be mirror-reversed. Some of the objects in Stevewanstall's image are stars, others are moons.
    2 points
  49. I took this image on the same night (not EEVA though, 9.25 SCT with modded Canon 500D, 10 s exp , I think). The Sky and Telescope tool showed where the main moons should be. Apparently Umbriel and Ariel are often lost in the glare of the planet.
    2 points
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