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Showing content with the highest reputation on 27/05/18 in all areas

  1. Update: 3rd June Re-processed to remove slight magenta tint caused by the non-uniform removal of light pollution by the DBE process ( it was being fooled by the very bright image centre ). The globular star cluster Omega Centauri ( NGC 5139 ) in Centaurus ( please click / tap on image to see larger and sharper ) A full size image can be found here. original below ..... A newly captured ( May 2018 ) image of the great southern globular star cluster, Omega Centauri ( NGC 5139 ) Omega Centauri ( NGC 5139 ) in Centaurus - ( please click / tap ima
    20 points
  2. My vacation is almost over but I had a good time and did astronomy on 4 occasions in 7 days, which is very good for a week! (; It was all about Venus, Jupiter, the moon, and one observation out of 4 were done with my new Orthoscopic 6mm which I received by mail. À Great end of vacation gift! I spent some time attempting to sketch of a few craters, the pale and one is called "kies" It's close to larger crater Bullialdus in the Mare Nubium. This was of course a perfect exercise with my new OR-HD 6mm @ 167x total power the resolution was impressive. Also an observation the same day I receiv
    9 points
  3. Or, to put it another way, Takahashi FC-100DL on Vixen GP DX on Berlebach Uni 28 tripod Hope it stays clear.
    9 points
  4. 12x600sec, bin1, -20°, SBIG St 2000xcm, SW BKP 150/750, HEQ5 Pro SynScan mod. Zwardoń, Beskid Żywiecki Mountain, Poland.
    8 points
  5. Hi, At the end of last year, the Sky at Night magazine had some articles describing how to build an equatorial platform for a dobsonian, to allow you to track targets across the sky due to the earth's rotation. However, I found the articles too brief as a set of instructions to build from. Anyway, I've now built it (with a little extra help from Mark Parrish, the extremely helpful SaN designer). Once I'd figured things out, I was able to adapt the design to the Skywatcher 200P. I've tested it tracking the sun, and to my amazement it actually works pretty well too! To help anyon
    7 points
  6. Two exposures with the 200mm, both at F9/ISO 100. One at 1/2s and the other at 1/200s to expose for the Jovian system and our Moon separately. Then some layer masking and levels adjustments in Photoshop, job done. It's got novelty value
    7 points
  7. Today I like to present the first and second light with my new camera, ASI 1600 MMC. First an emission nebula in Cepheus, SH2-140, 11 hrs. HaLRGB: More info: http://www.spaceimages.de/en/astrophotos/nebula/sh2-140 or https://www.astrobin.com/345427/ Second the Coma galaxy cluster Abell 1656, 13 hrs. LRGB: The picture also shows the Quasar QSO[HB89] 1256+280. With a redshift of 2.66, this quasar has a distance of 11.3 +/- 1 billion light years. It is thus located shortly after the Big Bang and thus the observable part of the universe: More in
    7 points
  8. Click through for full res
    7 points
  9. I hope I can add a comment on this as well Stu? Under VG to excellent transparency there is little effect on the SQM-L readings and as transparency worsens or actual clouds appear false dark readings can occur. Common sense kicks in on this though. There is an interesting phenomena with respect to light domes and scattered clouds- if trans is avg to poor and there is an individual cloud over a light dome, light is scattered all over the place giving a lighter reading than normally would occur... this phenomena also makes normally invisible light domes appear to the eye as well IME. T
    7 points
  10. I've been putting together a 1.25" eyepiece set for my scopes which now consists of 24 Panoptic, 18.2 ,7 Delite, 14, 10, 6 Delos and 4 SLV. I'm very satisfied with this for the time being at least. Avtar
    7 points
  11. Here is my rendition of The Coma Cluster, a dense gathering of galaxies some 300 million light years away in the constellation of Coma Berenices... and wow, what a gathering it is! The field of view is just full of galaxies. PixInsight has annotated 655 different galaxies across the image. I think that is definitely a Personal Best for Galaxy Count for me! The Coma Cluster is also of note as it played a key role in the story of dark matter. In 1933, Fritz Zwicky derived an estimate for the mass of the Coma Cluster by using its gravitational pull. The figure he came up with seemed much greater
    6 points
  12. A programme covering the history of the telescope. Starting in 20 minutes! I know it's a bit close but I've only just seen it advertised.
    6 points
  13. The type of glass is irrelevant to the performance of a finished mirror. The biggest factor in poor performance of a mirror is the temperature difference between the mirror and the ambient air. If the mirror is just a little warmer than the air, thermal plumes of air arise from the mirror and destroy the image. It is not until the whole mirror and surrounding air are in equilibrium do the thermal plumes cease and the mirror performs to it's best. As there is then no thermal difference across the mirror it's thermal expansion properties are of no consequence. It's a different story if
    6 points
  14. NGC 4945 is a barred spiral galaxy in the constellation Centaurus, visible near the star Xi Centauri. NGC 4945 is about 13 million light-years away. GSO 6" RC HEQ5 Pro Belt mod ZWO ASI 071 Pro 15 x 10min
    5 points
  15. Mars in opposition 22/05/2016 01:09 Are visible as two light spots two vulcains. From left to right: Olympus Mons and Elysium Mons (76.326 million km) GSO 0.20 m Sky-Watcher NEQ-5 Pro SynScan mount QHY5L-IIC + IR cut filter GSO barlow lens 2.5x (APO) f: 2500 mm f/12.5 Matteo Vacca Milis, Italy http://vaccamatteo.weebly.com/ https://www.astrobin.com/users/matteovacca/
    5 points
  16. Hello! Last night i had my first succesful planetary imaging session with my new scope and my DSLR. I used BackyardEOS with the crop mode at f/10, the results where very satisfying, miles better than anything i had done before. Maybe i could have added a 2x barlow but i am not sure if atmospheric conditions would have allowed for that. So...here are the results, please give me your feedback, Clear Skies!
    5 points
  17. Just delivered by the Amazon person.
    5 points
  18. Here she is, much shortened, but ready for action !
    5 points
  19. I thought the title might grab the attention of certain people. I have had this Takahashi for just two days, and the clamshell is two weeks away, so I set it up on the breakfast bar as I just had to look through it. I put in the T2 prism diagonal with the 2" nosepiece, loaded the binoviewer c/w a pair of Ultima 30's and.......nothing, I could not reach focus.The telescope was already considerably shorter than when it arrived anyway, as I had removed the spacer tube and 1.25" adapter to fit the 2" adapter that came this morning, courtesy of Ian King Imaging. I played around with the variou
    4 points
  20. Hello! I tried imaging saturn last night along with jupiter (already posted jupiter results). It was the first time i could use my new 8 incher and my DSLR for planetary imaging. Info was captured at f/10, probably a little low for saturn but for jupiter it was alright, atmospheric conditions didn't allow for more than that really. I was pleased with the results. Please give me your feedback, Clear skies!
    4 points
  21. Hello Astronomers, I haven't imaged M83 for about 4 years and I wanted to see if my imaging has progressed in that time, so M83 was the perfect candidate for my next imaging project. This image was captured across two nights, 18 & 19 April 2018, using a Astro modded canon 40D through a 8" SCT at 2032mm focal length. The Southern Pinwheel Galaxy, M83 or NGC 5236 is a barred spiral galaxy 15 million light-years away in the constellation Hydra. The nickname of the Southern Pinwheel comes from its similarity to the Pinwheel Galaxy visible from the northern hemisphere.
    4 points
  22. It's the end of galaxy season (at least here in the UK where astronomical darkness has come to an end for a few weeks) and after a long three year break from imaging galaxies - due largely to imaging with a scope of focal length of just under 200mm - I've managed (just) to get some data in before it got too light... I nearly didn't 'finish' this one as I've had some problems guiding objects over on the west side of the meridian (my 8 year old HEQ5 needs a little tweak I think!) and all of my subs showed some sign of my tracking problems but I've tweaked what I can. M81 (aka Bodes ne
    4 points
  23. As a user of an SQM in a professional capacity I have found exactly the same. And another thing, there can be a slight variance in 2 SQMs! I have use of at least 2 SQM-Ls (one of them being my own) and a few SQM-LU-DLs, too. The 2 SQM-Ls produce a consistent difference of .21-.23 MPSAS....it's not a precise art but it provides useful ways of determining how dark a site is, if used properly. Other things to consider: low battery power can produce false, high readings. Disregard the first reading due to initial sensor temperature being out of whack with ambient - several readings
    4 points
  24. Olly, you just gotta look through it someday, stunning scope. I’ve never seen E & F stars in the trap shown so amazingly, they were just ‘there’, beautiful tiny pinpoints.
    4 points
  25. Rings when Tak offer a superb, beautiful, matching and superior clamshell? And the rings are red for goodness sake. What would possess anyone with a modicum of good taste to put red rings on a beautiful, elegant, white, blue and silver Tak tube assembly? It would be like putting Micra wheels on a Porche.
    4 points
  26. 4 points
  27. I managed to image Jupiter last night and didn't realize that this was even a challenge. I already posted my image in the Imaging board, but I guess I need to post it here too. My first image of Jupiter. I also managed to capture Ganymede, Europa and Io as well. Callisto was just out of frame. This was done using 750 frames of a 1000 frame video from my 12" dob, a 2x barlow and my Canon 750D. I processed the video with PIPP and Registax and did a little bit of editing in Photoshop CC. I was very surprised I was able to get the moons to pop just by using the wavelets in Registax and I didn't ev
    4 points
  28. Hi Alan, Good to see you back. Paul has been absent for a while and hasn’t visited SGL since July last year. We all miss him and were worried about him. We did find out through Terry at SX that he was ok, but extremely busy with his work related projects. We are all hopeful that he will return some day and continue to support Starlight Live. In my opinion, it still remains the best live viewing software available. I still use it here at the VIS on Mauna Kea. If Paul returns, it will be big news in the EAA community, and it will be posted in this forum. Don
    4 points
  29. Yes Alan White I have others just didn't get my other cases sorted yet. Lockie & Piero its on the way, Should get it Friday or Saturday.
    4 points
  30. I would like this topic to raise the profile and awareness for using a Sky Quality Meter aimed at dark sky seeking, DSO observers. A sky quality meter, is a hand held device that reads in magnitude per square arc second, night sky brightness. A popular model, and one that I use myself, is a Unihedron SQM-L. This device has an angular sensitivity response of 42 degrees, which is used to take readings at zenith and can also be used to aim at other angles towards an intended target. Observers using this device will take a frequency of readings throughout an observing period, when transparenc
    3 points
  31. Here's one of the many meteors my radar meteor detector picked up last night at about 01:02 BST, 27th May 2018. The short orange streak to the left of the image shows the meteor's ionised trail reflecting radio waves from the Graves space radar located in Dijon in the south of France and detected using the Yagi antenna I built from stuff obtained at B&Q and the cheap SDR dongle. It's not that exciting a meteor but at the same time, we had that almost unprecedented set of thunderstorms over southern England. (http://www.bbc.co.uk/news/uk-44269304) Over 15,000 lightning strikes w
    3 points
  32. Small spot group captured today with 152 & 80 fracs, 174 & 178mm cams, Baader prism. Hot today, summer is finally here ! ML
    3 points
  33. Io transit Jupiter 25/05/2018 22:55 Small animation of the orbit GSO 0.20 m Sky-Watcher NEQ-5 Pro SynScan mount ASI 120MC + IR cut filter f: 1000 mm f/5 Matteo Vacca Milis, Italy http://vaccamatteo.weebly.com/ https://www.astrobin.com/users/matteovacca/
    3 points
  34. Clubs should have one, people who go on observing trips should have one, people interested in mapping or tracking dark skies should have one. Like quite a few bits of Astro kit, not everyone needs to own their own, we are happy to share. PEterW
    3 points
  35. Very interesting. At £129 these things aren’t cheap. There are some cheap phone apps available purporting to do the same thing; has anyone assessed how accurate they are? It would be very interesting to be able to compare skies more objectively. And use other people’s data to find sites that are good’uns mor easily.
    3 points
  36. Hi everyone, This image was captured across two nights, 18 & 19 April 2018, using a Astro modded canon 40D through a 8" SCT at 2032mm focal length. The Southern Pinwheel Galaxy, Messier 83 (M83) or NGC 5236 is a barred spiral galaxy 15 million light-years away in the constellation Hydra. It is one of the closest and brightest barred spiral galaxies in the sky even visible through a small telescope. The nickname of the Southern Pinwheel comes from its similarity to the Pinwheel Galaxy. Clear Skies, MG
    3 points
  37. Free dinner for anyone bearing a TEC160!!!! Olly
    3 points
  38. I've never known of a Tak clamshell springing open or the locking nut coming loose. I'm pretty certain it wold be headline news on the world's astro forums if they did. I'm pretty certain that the dovetail/mount interface is where the real danger lies and not with rings or clamshells.
    3 points
  39. So I start out wondering whether to buy a 120 Tak or saving money by buying a 150 APM lens cell and within 24 hours you guys have got me looking at the TEC 160 ? You can always rely on Team SGL to help make you more confused than you were to begin with ?
    3 points
  40. I don't need to know this! I need NOT to know it!!! ?lly
    3 points
  41. Getting a big box is always dangerous..... PEterW
    3 points
  42. No, I doubt it. It's an oil spaced triplet so all the elements are effectively in physical contact with each other (via the very thin film of 'oil.') The inner elements can conduct heat effectively to the outer in contact with the air. Mine lives outside but there is a massive difference between daytime observatory temperatures and night time air temperatures. When I image with the TEC it is one of the most thermally stable telescopes I've used, moving relatively little during cooldown. It's surprisingly light for a big scope, too, and one with a seriously good focuser. TEC say 19lb or 8.6kg.
    3 points
  43. I had a tec 140 and found cool down very quick. The fact that it’s oil spaced not air spaced makes it quicker to cool down. Within 30 mins I’m able to do high magnification. I upgraded to a tec160 and have no issues with this one either. I’m visual only and have no problem with the weight. I use a couple of triplets for visual and think they are great.
    3 points
  44. 5 more hours of rgb. Edge hd 800 Asi1600mm pro Efw+ZWO LRGB Questions and comments welcome!
    3 points
  45. Getting out to a dark sky location in the UK can become a real sense of occasion. Not least because of the probable infrequency and quite committed effort involved and more specifically if fortunate enough to be able to enjoy lengthy periods of good transparency. To collect data to validate the sky darkness can be relevant information to include in an account for if a particular enhanced observation, such as for example, the Crescent Nebula is achieved. The SQM model option provides a wider angular reading, that will detect any light dome impacting the vicinity and will give a variable reading
    3 points
  46. First time capturing grs and can actually make it out. ASI120mmS, c11, mini efw, roi 640/480, 60s each rgb, winjupos derotation, stacked as3, aligned in nebulocity, touches in ps. Bright moon interfered a bit, some brief moments to get few good frames. During capture usb3 cord (thin type) came with asi120mmS wasn't working properly, would only capture frames sporadically. Swapped it with thick style usb3 cord and problem went away thankfully. Clear imaging.
    2 points
  47. As is thinking your eyepiece collection is complete..........
    2 points
  48. That’s a wonderful image, PhotoGav. As you say at first glance it doesn’t look anything special, but when you take a closer look it is truly mind blowing. For me, capturing an image like this makes all the expense, effort and frustration of Astrophotography worthwhile, where else can you point a camera and capture a vista as mind stretching as this?
    2 points
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