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Showing content with the highest reputation on 28/03/19 in all areas

  1. 17 points
    M81 again but this time with a HAlpha layer and more details to see in the background. Time to hunt next target Click on the image for the full. ASI 1600MM pro Lum 320 x 60 sec RGB 3 x 90 x 60 sec HAlpha 90 x 120 sec Newton CFF 200 F5 Avalon Linear & autoguiding Software APT, EQ mod, DSS, Regim & PS CS6.
  2. 16 points
    Between work/family/really poor cloud cover when I might have gotten out, the sad fact is that this was my 1st night out this year with my 15"! It has been eating me to see the darkness eroding away and we have the daylight saving time change coming up next weekend... so I was like a kid getting out last night - it was a beautifully clear blue sky all evening. With my recently washed mirrors, I threw the scope in the car and headed for a little spot on the coast 10mins from my house. Hmmm... "ceilings" of fog were appearing in my headlights as I drove down - I feared this but kept going. When I got to my spot I was dismayed by a security light on a house maybe 400m away which seemed to be aimed at me, and there was a whitish glow to the sky due to new cursed LED lighting in a nearby town catching the thin fog. This was not going to be a night of great transparency or contrast, but hey I just wanted to use my scope! With a tinge of sadness, I noted Orion low in the west - i never really got to study it this year. First target: M81 in the 17E, and swapping to the N31T5 for M81/M82. Hmmm transparency and contrast really wasn't great as expected, but still the views felt rewarding. On to the Sombrero, M104, with the 17E, and that dramatic dust lane! I swung over to the Black Eye, M64, with the characteristic dark patch showing. Then I tried for the Antennae Galaxies, NGC4038/39 - quite low in the haze, but could detect the two cores - a first time on this target for me, so chuffed! After a brief look at M90, I went for the Siamese Twins galaxies NGC4567/68, with NGC4564 nearby. Another first for me, and I definitely need to revisit in better conditions - looked really good Then it was up to Makarian's Chain and panning around noting so many galaxies, without trying to figure out their names or list them. It is just amazing to be viewing a multitude of galaxies in the same FOV around Virgo/Coma B. Next I went for the Spindle NGC3115, and then the beautiful edge-on, the Silver Needle NGC4244. At this stage it was increasingly foggy, and I wanted to get back to my wife, and not be too late. So I started to pack up and switched on my large white torch - wow - I was choked in fog: it's amazing I saw anything!! Short and sweet session, only an hour long and not fully dark adapted, plus not ideal conditions, but hey, I got out and got to use my scope and saw a few galaxies!! Glad I did it One thing is clear though: I need to find a better relatively local spot to observe from - the light pollution is getting too bad...
  3. 16 points
    Here is my completed image of NGC 2403, captured in LRGBHa. It's taken some time to get all the data together and process. In fact, I think this is the first image I've managed to produce at all this year due to some circumstances. Strangely, you don't seem to see NGC 2403 as frequently as it deserves - it's actually quite a decent size in the sky and is visible all year round from the UK, albeit a little low in the summer. It's part of the M81/M82 group and, being face on, it does look somewhat like M33's little sister! The Ha really adds a lot to the galaxy, there's lots of interesting HII regions and I've tried my best to blend those in. I also tried capturing some shorter colour data for the stars, but my haphazard processing skills have let me down as it didn't seem to add much. Anyway, thanks for looking. Here's the details: Capture L: 39 x 600s RGB: 12 x 600s each Ha: 20 x 300s Extra RBG for stars : 20 x 60s each Total: 14.5 hours Equipment Camera: Atik 460ex Optics: SW MN190 Mount: AP Mach1GTO Guiding: QHQ5L-ii & Orion mini guidescope Processing DeepSkyStacker Photoshop
  4. 15 points
    Welcome to the new electronically enhanced visual astronomy or, EEVA section on SGL Over the past few years, a number of new avenues of amateur astronomy have developed: video astronomy, live stacking, night vision and others. There has been lots of debate and discussion on what to call these, where they belong and how they are defined. Unfortunately this has often led to conflict, disagreements and entrenchment. SGL wants to encourage these new forms of astronomy, we believe they are going to be hugely important areas and want to help foster and grow the techniques, methods and equipment used. We also want to recognise that some of these techniques are 'different' to traditional visual observing and could cause confusion or unrealistic expectations for people reading topics if they weren't aware of the equipment being used to help enhance the views. They are also different to traditional imaging which is why we feel they deserve their own areas and recognition within the community. As such, we have coined the new phrase: EEVA or EVA which stands for: electronically enhanced visual astronomy. We hope this offers a catchy acronym which can be embraced by the community and used to describe these techniques and methods and give them their own area of SGL which we hope to foster and grow to become as important as the existing observing and imaging sections. We are open to feedback and suggestions but hope, after a pause of reflection you will see we are trying to do something good here, for the right reasons. Thanks, Grant on behalf of the SGL admin and mod team.
  5. 12 points
    Good week with clear nights. Next week looks like a few clear night as well but alas, I'll be on a business trip to London and the family doesn't know how to run the rig. http://www.astrobin.com/397749/
  6. 10 points
    Hi all. Martin aka Grumpy Martian recently started a thread to help him decide between buying a 6" f/5 Newtonian and a 4" f/7 Refractor. I've often thought either of these could be all the scope you ever need. Both scopes can be used effectively for many areas of astronomy including; DSO imaging and observing, planetary imaging and observing, solar, and EAA. so I decided to put together a video singing their merits....not literally singing their merits, you don't want to hear that I really do think either of these could be all the scope you ever need, but what do you guys think? Is there another scope you would choose instead?
  7. 10 points
    Anothe starry night but transparency wasnt good. (I used a UHC filter for both observations).
  8. 10 points
    It was clear for a short time last night and I have always managed to miss this galaxy before. Taken using my Canon 750d on ED120 and processed in APP. Only managed 20 subs before the clouds rolled in. Peter
  9. 10 points
    My 12" Dob has been outside for several days. I made the decision to view DSOs in Leo last night but before starting I wanted another go at the Medusa Nebula. My various observing guides recommend a wide FOV EP + an O-III filter. So I used my 30mm Revelation + 2" Castell O-III. Using my 80mm finderscope it was easy to find the location using the Interstellarum atlas. Did I see it? Well I could make out a very faint 'glow' not totally certain but it was in the right place. Over to Leo and these are the Galaxies that I observed over several hours - NGC 3193, 3190, 3226, 3227, M95, M96, M105, 3384, 3389, 3412, 3377, 3367, M66, M65 and NGC 3628. It was now becoming misty so I viewed M53 but failed again on NGC 5053. Ended the night going south to Corvus and just picked up the PN NGC 4361. Outreach event tonight at a dark site near Fownhope (close to the SGL star party site) but only taking my 6" Newt so hopefully a tour around Virgo.
  10. 7 points
    A very generous gentleman on the forum (I’m sure you can guess who) has leant me his Photonis NV monocular to try for a little while. Fortunately I have had a couple of clear nights this week and the opportunity to give it a spin, so, here is my report on what happened and my thoughts so far. The Kit I have borrowed consists of the Photonis NV monocular, a 55mm Plossl, a 32mm Plossl, an adaptor to connect the monocular to the eyepieces and one to connect 2” filters to the monocular for x1 viewing. Finally, there are two Astronomik filters, an Ha 6nm for viewing nebulae and a 642nm ProPlanet for viewing galaxies. The main intention was to try this with my Televue Genesis which is a 100mm, f5 scope with a flat field of view. In theory, very good for NV as it is fast. I also wanted to try x1 observing just handheld for scanning the skies, and also then considered using the Mewlon 210 for galaxies and clusters. Over a couple of nights this week I’ve achieved all three of these objectives, so here goes. On Sunday 24th March, I used the NV handheld at x1 with the 6nm filter in place. Orion was pretty low by this time, but I saw M42 albeit not very impressively. Moving on, the Rosette was clear, bright and quite large. From there I moved along the bottom of Gemini, and found a small bright patch of nebulosity which turned out to be the Monkeyhead nebula, I had never really known where it was before, and certainly hadn’t seen it visually. Scanning through Auriga, I noticed a patch of nebulosity with some form of structure to it. Again, I didn’t know at the time but it was the Flaming Star Nebula, another than I had not seen before. Next up, the California Nebula. This one was bright with an obvious elongated shape, one of the better targets. Finally, the Heart and Soul nebulae. This is in a bad area of sky for me at the moment but still I managed to detect both of these nebulae. So, overall a good start. Targets that I just never see from home, or even have never seen before became quite obvious. Monday night, 25th, I negotiated a couple of hours observing between 8 and 10pm with SWMBO because we both had early starts in the morning. I got the GP-DX up and running with Skysafari early on with the Mewlon on top, but must have messed up the alignment because the Gotos were way off. M42 looked ok, but the scope was still showing quite bad tube currents, so I decided to switch to the Genesis and get going with the main event; nebulae hunting. I had to quickly change the dovetail on the Genesis because it would not fit on the new, longer ADM dual saddle I fitted recently. Once fixed, a fresh alignment sorted the gotos and for the rest of the night they were very accurate, although it needed a quick re-align after I switched to the Mewlon. The skies were clear, but the transparency was only average I would say. I was too occupied with working out what I was doing with this unfamiliar kit to take an SQL measure or even assess the NELM, but normally my skies are mag 19.1 at best, around mag 5 NELM. I suspect it was a little less than that last night. The Genesis was theoretically giving around 4.4 degrees field of view, but in reality it felt like 4 degrees max, possibly a little less. My first target was the Rosette, and I will confess to being a little disappointed with the view. It was more like a poorly defined oval with a central hole than anything defined. In hindsight I think this was down to sky brightness – it was still not Astronomical twilight when I started observing, and also dark adaptation. This is a controversial point which I will address with my thoughts at the end of this post. Later on I returned to the Rosette and it was much better, even though it was lower in the sky. Clear structure to it and much better definition. The darker central hole sparkling with the stars of the embedded cluster. I moved on to the California Nebula, NGC 1499. This was better straight away; the long axis very nearly filled the field of view, and I could see both the overall shape, plus the brighter edges and slightly darker inner regions. I viewed this one several times over the course of 2 hours, and it generally got better each time, more definition and detail visible. The Flaming Star nebula was a disappointment. Very poorly defined, although I did also identify IC417 nearby which stood out quite clearly. The Monkeyhead was a good one, the shape was clearly identifiable, and I got hints of the internal structure which made the ‘monkey’ association clearer. Onto the Heart & Soul nebula next. The Soul, I found quite soulless… ? Not much definition, just a sort of squared off long oval shape, if that makes sense. The Heart on the other hand was much more interesting. I could follow the loop of nebulosity dropping down from beside the embedded star cluster, and also hints of the ‘arm’ stretching out. Bearing in mind these two were in my worst direction, towards London and Heathrow I was surprised to see anything. Lastly with the Genesis, I went for the Pacman Nebula which I enjoyed. Clear shape, with the Pacman mouth plain to see. Actually, lastly was incorrect, I noticed just before I took the Genesis off the mount that Orion had cleared the annoying (but very nice) tree which blocks the view of Orion at a certain time and was still visible above the neighbour’s house. Not expecting anything, I tapped IC434 on Skysafari and sent the scope off to find it, which it did, bang on. The Flame Nebula, NGC 2024 was immediately obvious, with the central lane well defined. There wasn’t much more detail to be seen to be honest, but it was reasonably bright, particularly given the transparency and altitude. IC434 was visible more faintly, and initially I didn’t think I was going to be able to see my prize! However, with some averted vision, and flicking my eye from the target away, I was able to see the notch in the nebula that was the HorseHead Nebula. It wasn’t obvious, or always there, but reference to Skysafari showed that the object I was detecting was in exactly the right place, so I will put that down as a win! The Horsey from a suburban sky with a 20 year old 4” scope and a bit (lot) of help from technology, not too bad! I’m hoping to get a chance under better conditions, as I think the nebulae will show better with improved transparency. It will be interesting to put the Genesis side by side with Gavin’s Baader 95mm (ooops, gave it away) to see which gives best results. I’m hoping the veteran Genesis will at least give a good account of itself next to the young pup Baader. Time to switch to the Mewlon for some Galaxies and clusters. The Goto drifted a little after the switch, but I aligned on nearby bright stars with Skysafari to get it back on track. The Leo Triplet didn’t quite fit in the field of view which I would estimate at around 0.7 degrees. I guess I would say this was an nice view, but not overwhelming. M65 and M66 were there, had shape and showed in their correct orientation. NGC 3628 was visible, although much fainter. I’ve seen better views in a large dob under dark skies, but this was a 4” scope under poor skies, so I can’t really complain! These targets are all but invisible in this sized scope from here normally. The Whirlpool Galaxy showed as two bright cores, little or no halo detected. I did a whirl (?) around a few more galaxies; M95 & M96, M83 and M106. All were clear visible as galaxies but with little to see other than their basic shape. More rewarding were Bode’s and the Cigar Galaxy. Bode’s showed as a bright core and the faint oval shape of the spiral arms (no spirals visible though obviously). The Cigar Galaxy was great, lovely elongated shape, and dark mottled structure in the centre. A really nice view, the best galaxy of the evening. Finally on the Galaxies I went for the Needle. This showed clearly as the core, with it’s fine needle like arms extending from it. They showed better with averted vision, growing in length each time I moved my eye away. Last stop were the clusters which turned out to be great targets for this combination of Scope and NV. The Double Cluster was fabulous. Lacking the fine pin point stars that you get visually normally, but made up for with the sheer number and brightness. I couldn’t quite fit both in comfortably at once, but taking each on its own was more than enough. M44 was too big for this combo really, but M67 was ideal, resolving clearly in a fine, small cluster. Lovely one. M36, M7 & M38 all benefited from the NV, showing far more stars and with more definition than visually. Each has its own character, very different and they show the variety that you can get with what are apparently similar sized cluster. And finally, as Mr McDonald used to say…. M3. A great way to finish. Bright and resolved to the core, it would have benefited from some addition mag but I could not face changing eyepieces at that point so that is one for another night. It seems that globs respond well to NV too, so definitely worth trying for more of these. I wish I had had the time to move on to the Virgo cluster of galaxies, and hope to be able to do that at some point before this lovely kit has to go back home! So, my thoughts? I very much enjoyed using the NV gear in both scopes. Very different setups giving good results on different targets. Fast scope for the faint nebulae, and larger aperture for the galaxies and clusters. Despite being electronic in nature, using NV feels very natural and does not necessarily serve objects up to you on a plate. You still have to put some effort in to get the best out of the kit. Two questions…. Do you need to be dark adapted to get the best out of NV? In my short experience yes, some level of dark adaptation is required because looking at my phone on even on half brightness still significantly reduced the amount of detail I could see afterwards. Setting my phone to low brightness and red really helped. The NV display is not that bright, so I think you have to adapt enough to maximise what you can see. The precise biological mechanism in this instance I have no idea about! In my view using NV does affect your night vision though for really faint objects so I would tend to stay clear of mixing NV and traditional visual astronomy in the same session if you want to see the most visually. Is AV useful for NV viewing? Again, I would say yes to this. Specifically for the Horsehead and the Needle Galaxy, AV was a clear benefit to detecting the Horsey and seeing the further extension of the galaxy's arms. Like dark adaptation, I am unclear of the mechanism at work, but it does seem to be a factor. I hope that has been useful as a newbie's guide to NV use. This kit is very expensive, and without selling much of my kit I won’t be in a position to own an NV monocular myself. I believe I will always be a committed, traditional visual astronomer; I have a large element of masochism in me which leads me to take the harder route to achieving my observing goals, so I will always enjoy being under a dark sky and observing with just optical aids. That said, I am in the very fortunate position of being in one of the few (only?) clubs in the country with two NV owners (and a possible third around soon), so I have been able to enjoy the technology without the sizeable investment! It really is a game changer in terms of being able to observe faint objects from poor skies, if you can afford the stakes to play! The interesting point is that it also benefits from being under dark skies, just the same as regular observing, so ultimately we are still all after the same thing! Less light pollution please! With grateful thanks to @GavStar ??
  11. 7 points
    I welcome this development and hope that it will see NV and other electronically-assisted observers getting together to discuss DSO observations. And I also hope that traditional visual observers will feel welcome to chime in with their observations too! Perhaps we can set up some monthly challenge objects and compare notes. Just for clarification: I'm assuming that the Discussion sub-forum (this one) will be the place for discussion of equipment, software, observing techniques etc, and the Reports sub-forum will be limited to observational reports (as opposed to reports on say a new bit of kit)? Martin
  12. 6 points
    To put this in perspective, I bought my first SCT nearly ten years ago. And in all that time, there has been one word that has scared me witless (no, that's not a spelling mistake ) ... collimation!!!! There are so many horror strories around of people scratching corrector plates and simply messing it up completely and making a scope unusable, that I have always avoided it like the plague ... once even preferring to sell the scope I had and buy another one to avoid having to do it [don't you just love the logic of that one?particularly when there is no guarantee they will arrive collimated!]. I've always belonged to the "I don't care about winning, I just don't want to lose" brigade. Six months ago, I bought an RC6 and recently picked-up a cheshire eyepiece. No corrector plate ("But don't drop the allen key into the tube," the websites warn!). If I'm ever going to do this, now is the time. A quick look earlier this week showed the dot well out of position, so yesterday ... I procrastinated ... o come on, you didn't think it was going to be that easy, did you? But there are clear skies predicted for tonight, so this morning I went outside, set up my NEQ6, plonked the RC6 onto it, pointed it slightly downwards and went and made a cup of coffee. Returning to the scope I started to have a play. I kid you not. In less time than it had taken me to set up (excluding the coffee), I had the black dot slap-bang in the middle of my white circle. The allen bolts were tight, yes, but not "wheel-nut" tight; not "you need three feet of metal bar wrapped around the allen key to lean on in order to loosen it" tight. And yes, my first move was in the wrong direction ... so what??? It was so monumentally, stupidly easy ... why all the horror stories on the internet? Am I pleased I set it up outside where there was plenty of space, rather than struggling in the lounge? Yes. Am I pleased I got a cheshire so I could do it in daylight? Yes. Were the ten years of worry that I had endured dreading this day a waste of energy? You bet! So my message is to anyone who looks at the word "collimation" and immediately becomes a rabbit in headlights ... Action Cures Fear ... seriously, just do it ... if I can do it, ANYONE can.
  13. 6 points
    Hi everyone I didn't realise this was possible with basic stuff and now wish I'd started with a longer FL. Several galaxies emerged surprisingly bright. Just hoping for the urge to start over again with something bigger... Oh and not a good background. Linked with my poor processing, maybe a limitation of dslrs over long exposures? Thanks for looking; gotta love that 's' shaped galaxy:) 700d on pn208 20x8min @ ISO800
  14. 6 points
    If it's a mirror blank you will need to be really good at french polishing.
  15. 6 points
    I snapped this quickly on my phone while we stood back to admire Its a beast of a set up. Cant wait to get data from it. Tom
  16. 5 points
    I decided last night to try my S.A. with an old 400mm Tokina 400mm f5.6 lens on a Nikon D5100 mono modified body. Although I have the Pro version of the mount I decided to just mount the camera/lens on a ball head rather than the the dec shaft and counter weight. I pointed the lens at M51, focused by zooming the image on the camera's live-view screen. I set the iso at 1600, shutter to bulb, connected a shutter release cable to the 'snap' socket on the mount which gave me circa 100s sub frames. There is a firmware update which allows other variations but I'm using as supplied at present. The image is a central crop of the frame. 45 frames were shot and 34 selected via PI's blink viewer taking out frames with aircraft/satellites etc. No darks, bias or flats have been added. No DBE to even the background. Frames integrated and histogram adjusted. Will try again with the lens/camera mounted on the dec shaft with everything balanced out.
  17. 5 points
    Observing Report 25/3/19 A clear sky and a free evening coincide at last! First up was setting up the 200p for an imaging run on M101 (still stacking!) and then a nice little session with my son and the 8 inch Dob. Betelgeuse was first up and discussing how if it was where the Sun was we’d be in it! The Orion Nebula at 48x was a nice site, with the 4 brighter trapezium stars quite distinct. We then moved onto the Double Cluster which filled the eyepiece at the same magnification- so many stars! Finally we had a look at M65 and M66 in the Leo Triplet. A bit of family time and then back out with the 14″ for a more serious session. In Auriga- M36, M37 and M38 were a good place to start, they’re sliding off to the West now and in a better place for comfort and (from my location) light pollution and seeing. I was swapping between the 24mm Baader zoom and the 35mm Orion that came with the scope, and whilst the 35mm offered a better Field of View the 24mm had better contrast and brighter stars. It became clear during this time that whichever eyepiece I was using, the seeing was good and conditions were better than they’ve been for weeks. Next up I returned to Leo and the triplet. As usual M65 & 66 were quite easy to see, but whilst the 35mm needed averted vision to see NGC3628, it was quite clear in the Baader zoom with direct vision and that eyepiece remained in the scope for the rest of the session. M105 and friends were quite clear and continued the evening’s theme of multiple galaxies in a single field of view. And so- over to Virgo- starting at Vindemiatix and hopping up to M60, with M59 again in the same view. Whilst looking around and enjoying the pairing, with both galaxies showing a bit of shape, NGC 4638 popped out at me as well. With the conditions better than for weeks I then embarked on a wander through the wonders of Virgo that went well past bed o’clock but where the next object was rarely more than a Field of View away. From my notes: M84 Bright Core, no Shape M86 Bright with some shape M88 Yeah! Bright, some shape M89 Core very bright- but no shape M90 Clear flat ellipse; some shape with AV M91 V faint- no shape NGC4638 Quite easy to distinguish NGC4564 Clearly seen NGC4568 AV Only NGC4477 Direct Vision NGC4479 AV Only NGC4473 Clearly seen with DV NGC4458 AV Only NGC4461 AV Only NGC4435 Clear and distinct from other Eye NGC4438 Clear and distinct from other Eye NGC4388 Flat shape NGC4413 V Faint but direct NGC4402 Faint- AV only NGC4476 Quite clear next to M87 NGC4478 Quite clear next to M87 NGC4486a Quite clear next to M87 Altogether that’s 30 galaxies observed in quite a small segment of sky. I was discussing with my wife afterwards my fascination with looking at these. In many ways they’re no spectacle at all- fuzzy patches of lighter sky, some of them little more than mottling against darkness. Yet when viewing them with the knowledge of what they are, of the vast eons across which this light has travelled, and of the journey we have been on as a species to reach our present knowledge plus the many open questions that remain about them they are, in the most literal sense, awesome. All this was combined with a little buzz of achievement- several times last year I tried to galaxy hop through Virgo to Markarian’s and always found myself losing track somewhere and returning to the start point. There were a few shaky moments last night but the feeling of accomplishment at the end was quite immense. I spent today at a corporate event needing to look bright eyed and bushy tailed which required rather a lot of coffee. I’m not sure I was making much sense by the end, but it was well worth it!
  18. 5 points
    Just an update, below is the final list I discussed with Steve at FLO: Steve is kindly letting me keep each scope for a period of two months, plenty of time to get some quality time under the stars, and to formulate a balanced review. First up is the Skymax 102 AZ Pronto outfit, ETA around Monday @ Steve and Team FLO ? https://www.firstlightoptics.com/inspire-series-telescopes/celestron-inspire-90mm-az-short-refractor.html https://www.firstlightoptics.com/sky-watcher-az-eq-avant/sky-watcher-skyhawk-1145ps-az-eq-avant.html https://www.firstlightoptics.com/astro-fi-series-telescopes/celestron-astro-fi-90mm-refractor.html https://www.firstlightoptics.com/latest-telescopes/celestron-powerseeker-114eq-with-motor-drive-and-phone-adapter.html https://www.firstlightoptics.com/sky-watcher-az-pronto/sky-watcher-skymax-102-az-pronto.html https://www.firstlightoptics.com/latest-telescopes/sky-watcher-star-discovery-90i.html
  19. 5 points
    This new EEVA Discussion board is us embracing a new approach and change ?
  20. 5 points
  21. 5 points
    QHY183M arrived earlier In the box: Pretty much bare bones but no interesting extras! Standard 12V cable (bottom right) is redundant. USB 3 cable (middle) is a bit short but will probably do for now. ST4 cable (top) is redundant. Desiccant and tube (top right) pretty much redundant - if you don't undo the screw for the desiccant tube, you probably won't need to! T2 to 1.25" adapter (top) might possibly get used but not necessary at the moment. The 12V power mtof lead (top left) with screw connector could get used but probably isn't necessary. No software disk supplied so will have to download the drivers. Camera weighs 449g so not heavy. Weather - cloudy Slight chance of some clear skies on Saturday night but not holding my breath... Louise
  22. 4 points
    wall to wall sunshine today, the long prom has grown. seeings better but far from ideal "darn jetstream". kit starwave 102 f11, quark. asi120mc. thanks for looking, clear skys. charl. prom upper oncoming limb. prom upper off going limb. prom off going limb mid.
  23. 4 points
    This is a two panel mosaic of Sh2-155 comprising a lot of 20 minute red, green and blue sub-frames for 28 hours total integration time. Taken with my FSQ-85 with 1.01x flattener and Moravian G3-16200. Processed in Pixinsight. Andrew
  24. 4 points
    Found that thread and read most of it. Seems there is a purist attitude from some visual observers towards NV. But when you guys express the same purist attitude towards the rest of the eaa observators, you just make the visual purist's point even more valid. On the other hand I' ve read some posts on planetary AP, from people like Avani, that are pure observational reports based on the images he gets, and that to my eyes is great observation report.
  25. 4 points
    The older I get, the simpler I like things to be, and as a visual only observer I don't care to fuss about with unnecessary gadgets. So, considering that my Wife and I like travelling to dark destinations, our little kit here would be my one scope choice. .
  26. 4 points
    3x50x300 sek HA-OIII-SII Takahashi FSQ 106mm + reducer Nikon D600 mono mod
  27. 4 points
    English not being my native language, perhaps has me confused. I can't understand what the problem is? Do NV users feel they can't post their observations in the general deep sky observation sub-forum? I don't think there is any rule against it, if they feel like doing so. Or do NV users feel there should have been an even more specific subforum devoted completely to NV? Come on now, a refractor owner is not supposed to join in discussions about newtonians, if he has no interest in them, despite all of these are in the "scopes- whole setups" subforum.
  28. 4 points
  29. 4 points
    Latest iteration. Just sold a pair of 15mm TV Plossls and bought a pair of 15mm Panoptics. Added Lumicon UHC and Deep Sky 1.25" filters too as they came up at a decent used price. Just need to do a bit of observing now!
  30. 4 points
    There is really simple way to deal with any LP if imaging. Just throw more total exposure at the target and at some point you will reach satisfying results. It might take a while, but you will get there. Maybe not this season, but next one ... or one after that
  31. 4 points
    I would probably go for the VLT in Atacama........
  32. 4 points
    Very interesting to read about your experiences chasing PG 1634+706. Having similarly spotted 3C 273 with my own 10” f/4.7 dob recently I became inspired by you and Stephan. 3C 273 blew me away with the mind boggling characteristics and also the confirmation of my ability to detect faint objects. I have only observed with a telescope since September 2018 and I’m obviously still learning a lot about the capacity of it. I thought mag 13 was about the limit for stellar detection under my circumstances but reading your account got me thinking that it might be possible to go a lot deeper. My dark site has a SQM of 21.03 according to an online light pollution map and this particular evening seemed to have pretty good transparency and decent seeing. The Draco quasar seemed doable. Took my time setting up, collimating and viewing the area in binos to get the patterns right for star hopping. Both to get everything as prepared as possible but also to achieve proper dark adaption before setting off. This was my only target for the evening so no rush. Put in the 30 mm ES 82 and started in Ursa Minor with Pherkad as the jump off point. Proceeded to 15 Draconis and its close bright neighbour and from there to the 8 mag pair right next to the quasar. Switched to the 10 mm Delos and began to pick up the patterns next to the bright pair. At this point I started noticing that the view looked a lot dimmer than I hoped for. Started to despair and thought it was an impossible target after all. I looked up from the EP and saw that clouds had rolled in, obstructing the view. Took a break and kicked back for a while, saw that the horizon looked clear and after a while the clouds had gone revealing clear skies again. The stars now looked a lot brighter but still pretty dim to be honest and I believed magnification was needed here. Popped in the 6 mm Delos and figured that conditions were so that high mag wouldn’t deteriorate the views too badly. Added a 2x barlow to the 6 mm eyepiece for a whopping 400x and high contrast. Rarely used combination to put it mildly. Still workable considering tracking and the rate of drift and it was relatively easy to make out the 13.8 mag star (according to AAVSO) that I used for locating the quasar. Encouraging as it was almost a full magnitude deeper than 3C 273 that I had previously thought pushed the limit. Maybe PG 1634+706 was within reach after all. Double and triple checked the exact spot using the two 8 mag stars and the square of stars that just about filled the EP with the 12.8 and 13.8 mag stars on the top row. Moved my eye around, keeping my attention on the spot with indirect vision. Still nothing. Had to move the scope quite often because of the high mag and suddenly a diffuse point of light appeared in exactly the right place, visible for a heartbeat. Wow. Managed to repeat it three times over the course of 15 minutes or so which was enough for me to be reasonably certain it was not a trick of the mind. Incredible. Catching fleeting glimpses of an object from halfway across the known universe if only with a few photons. Wonderful to contemplate. Also, a very satisfying confirmation that it is possible to view objects of mag 14.4 +/- 0.2 with my setup and sky quality. I’m not exactly sure where in its light curve it is at the moment, but guessing on the brighter side. All in all I spent around two hours with this object. Thanks for the inspiration, well worth the effort!
  33. 4 points
    My first proper Narrowband image, captured at silly o'clock this morning, 120s x 20 in each Ha, Sii and Oiii, then I added in 9s x 50 in LRGB, Same amount of darks as the filters and exposures, and flats added as well. Not guided via camera only on my mount as my guiding needs tweaking! Any advice / guidance will be highly appreciated Taken with a Esprit 80, with field flattener, and a zwo 1600mm-Pro cooled down to -20. I used APT for capture and stacked and attempted process with AstroArt .
  34. 4 points
    Hi, Just came across this part of the forum -after a very cloudy winter, I had a week of clear skies in February. Scope is a SW Mak 102, Phone a Huawei P9. Eyepiece was a Vixen 25mm Ortho. Peter
  35. 4 points
    Wow!. You always take absolutely awesome and stunning pictures!!!
  36. 3 points
    Thanks to this thread and the reports / charts posted I've been able to spot PG 1634+706 with my 12 dob tonight. Thanks very much folks It's very, very faint indeed. I've found around 400x magnification and a combination of slightly averted vision and the "1000 yard stare" has helped this dim point of light show against the background sky. 8.6 billion light years - wow !!! Those photons have been travelling for nearly 2/3rds of the age of the universe .....
  37. 3 points
    Hello This is my version of M64 the black eye galaxy. Not good conditions this month and only managed 4hrs of data Telescope - 102mm APO ES refractor on a AVX mount Camera- Canon 70d unmoded iso800 with a IDAS-D2 filter. Duration 4hours - 300s lights., Darks, flats and bias frames also taken Guided with PHD2 and processed in PS Cheers Dean
  38. 3 points
    This was my point earlier Grant. Even as part of a wider EAA section, there are nothing like enough night vision users to support interesting threads/discussions. It will just become a backwater. I sympathise with you to the extent that no solution is going satisfy everyone. But if night vision had always been confined to a little visited corner of SGL, I might never have got into it. It was Gavin posting in the general equipment and observing forums that spiked my interest in the first place.
  39. 3 points
    As a dedicated observer I shall be dipping into this section to read your reports with interest.. Good luck with the new section guys .
  40. 3 points
  41. 3 points
    I think we should have a series of ‘meaningful votes’ on the subject. ?
  42. 3 points
    There's no way of keeping all parties happy in this situation. I just hope that everyone sticks around to try all the options that the admins come up with. A suitable solution will never be found if everyone leaves.
  43. 3 points
    I keep grabbing the gaps in the cloud as they come through to pursue my tour of Hicksons (and Arps). C9.25 at F4 ish, and Ultrastar mono. The first time I saw Hickson 39 I was thrilled to locate it as the galaxies are so tiny Hickson 39 located in Hydra. Name Mag approx Type class a 17 spiral Sb b 17 spiral SO c 17 spiral Sc d 17 spiral SO This group are about 1 billion lyrs away and receding at approx 7% of the speed of light. Hickson 40 In complete contrast this group are tight and make for a pleasing view. These galaxies are approx 300 million lyrs away and receding at approx 2% of light. Name Mag approx Type class a 14 elliptical E3 b 15 spiral SO c 16 spiral Sbc d 15 spiral Sba e 17 spiral Sc Hickson 44 Hickson 44 is well known and deservedly so. Hickson 44, located in Leo, one of the nearer galaxy groups to our own local group Name Mag approx Type class notes NGC 3193 11 elliptical E2 Arp 316 NGC 3190 11 spiral Sa tight arms,dust lanes, nearly edge on Arp 316 NGC 3187 13 spiral SBc loose arms from central bar Arp 316 NGC 3185 12 spiral Sba central bar and tight arms 3190 is the largest member of the group,very bright core, interacting with 3193 and the others? 3187 is s-shaped due to interaction with 3190?, plenty of star forming regions 3185 has a super massive black hole at the center 3193 is the second brightest in the group, interacting with 3190 Mike
  44. 3 points
    To me there is no significant difference in calling it EAA, Videoastronomy, NV astronomy or EEVA. The significant part is the addition of the observation sub forum. It will encourage us to post more observation experiences, which were here before but more in context with the "behaviour" of specific equipment as means of comparison. I don't think anyone should feel left out, because they're not. Now get out there and get some observations coming in!?
  45. 3 points
    Obseravtory in action.mp4 Snapped this one last night just before the moon came up 3x600s of Luminance added to some RGB I had from a while back. Its an extreme crop from the full frame just wanted to keep it nice and tight. My AG12 Newtonian and H35 Starlight Xpress. I have also just finished my observatory cam so I can keep an eye on the scope while imaging from the house. This is a little time lapse thrown together with the results from the session shown at the end.
  46. 3 points
    That's near enough to be a winner.... no brass, but yeah a new EP tray for the Iroko Tripod I made last year! I know, I Know... exciting times!
  47. 3 points
    I'm sorry you feel this is an attempt to hide away these new techniques particularly as the aim is the absolute, complete opposite. We genuinely believe these sorts of techniques are a big part of the future of amateur visual astronomy so much so, they deserve their own section and, this is just the start of some of the things we hope to do on SGL to encourage these newer areas of astronomy. I hope that after reflection you reconsider.
  48. 3 points
    An excellent, easy to listen to video Chris. I really can't fault your reasoning in any way and completely agree that if I had either of the scopes you mention, I be a very happy observer. Both scopes are very capable and serious instruments that could provide a lifetime of enjoyment. Of course, I'm of an age where I can remember if someone owned a 4" refractor or a 6" Newtonian, they would be regarded with a measure of awe, and with good reason. After nearly 40 years at the eyepiece I'm still passionate about 4" refractors and rarely imagine using anything else. With regard to Newtonians, I confess to having a soft spot for the 6" F8; and remember Harold Hill mentioning in his book "A Portfolio Of Lunar Drawings", that his 6" Newtonian showed all the same detail on the moon that his 10" F10 did, only not as bright.
  49. 3 points
    It is, of course hazy, and the Sun is a tad quiet... I'll probably pop a camera onto the scope later - there's a nice prom (visible without the double-stack filter).
  50. 3 points
    Always four of these are somewhere to be found in my workshop. Pity they do consume so much (expensive) batteries. So I did this :
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