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Found 69 results

  1. My submission for 46P Wirtanen Details: Single exposure, 1 minute iso 1250 Nikon 800E full frame - edge cropped Altair Astro 115 EDT-APO refractor on iOptron iEQ45 Pro mount. Capture: SG Pro, guiding PHD 2 via SX Lodestar Processing: PixInsight 1.8 and Photoshop CS3 Extended (for caption and resizing)
  2. A spectrum of Comet 46P (Wirtanen) with the ALPY600. The raw spectrum image before sky background subtraction. Note as well as the comet spectrum, the bright Na D line from local light pollution and other auroral lines from natural airglow The coma extended beyond the length of the slit so a separate sky spectrum was recorded and subtracted The Spectrum of the bright central region is dominated by the scattered light from the sun while the spectrum of the extended coma is mainly emission from excited molecules such as CN (The very bright line in the UV), C3, C2 (The Swan bands which give the coma its blue green colour) and NH2 By removing the emission component from the spectrum of the central region and dividing it by the spectrum of a sunlike star recorded the same evening, the reflectance spectrum of the dust can be extracted Robin
  3. I'm still dizzy after processing this one for each LRGB filter. Comet 21P meets open cluster M37 in the night/morning of 10/11 September, at perihelion. This is a combination of 60s x 30 x 4 subs, taken through the SW130PDS with an ASI1600MMC. https://www.astrobin.com/366252/ No deconvolution applied, only noise reduction. About the remaining noise?! ... yes, please. Unfortunately the light pollution at home didn't let me record more. Thanks for watching and clear skies! Alex
  4. From the album: Imaging Challenge #17 - Through the Eyepiece

    I just tried to see the moving of this object. I made 20 frames with my Huawei P10 smartphone, with the monochrome camera. My star tracking is not so sharp, I have alt-az mount, I used only 10 sec expositions at ISO 1600. The shots was taken in every 10-12 minutes in this time intervall: 00:16-03:53am 2018. 08.16. Celestron Nexstar 8 SE, 25mm plössl eyepiece (magnification 80x). Of course I used a good adapter too. Frames has added with Gif maker pro mobile application.

    © smisy

  5. barkingsteve

    Comet 21p timelapse 33 minutes

    500 x 4 second frames at 20 fps. 33 minutes timelapse. Taken tonight with an evolution 925 at F/6.3 and an altair astro GPCAM3 385c camera. Mount decided to be a dick towards the end
  6. I went this weekend to my girlfriend's parents and I took my Skywatcher 72ED with me and the smaller AZ-EQ5. Fortunately, the skies are dark there. So, on 11/12 August I put all the stuff on the mount and took 130+ 60s subs with the Canon 550D. The result is a crop, towards the edges the stars are not perfect yet, but they're a bit better than in the past. I put some additional spacers to the universal flattener and increased the backfocus distance. The comet doesn't fill the frame anyway. Unfortunately, the animation doesn't really play ball, I will upload it somehow else later. Neither on the processed image I did the best job, I need to improve somehow in removing the artifacts on the comet-only image. However, this is what I got:
  7. DoctorD

    C 2014 Q2 Lovejoy

    From the album: DoctorD's Photos

    Comet C/2014 Q2 (Lovejoy) taken on 01/02/02. Single 30s frame captured using Lodestar Live & Lodestar-C with INED70 and F6.3 reducer.
  8. Inspired by some tutorial advice on comet stacking with DSS - using the sigma clip to get rid of star trails - I revisited my data from last year. 91 subs, 41s long, ISO 800. I think this is now rather better and it shows Catalina about to enter the triangle of Mizar, Alcaid and M110. Some fuzzy trails around the tails beacuse of teh strstch needed.
  9. COMET C/2014 E2 JACQUES Meets the OPEN CLUSTER NGC 609 23 / 08 / 2014This is my first attempt at a Comet. After having various issues with stacking and a rogue stretched star as a result of a stacking error. I can finally feel proud after relentless hours spent at stacking and re-stacking this image. I feel proud I managed to process this Comet as well as it looks. I think there is a hint of a tail at the 3 O'clock position but who knows... The bonus is the comet is above an Open Cluster NGC 609 which adds more interest. Conditions were good and if I had set-up the Mount better I may have managed longer subs. There is a hint of star trails due to wind and tracking issues.16 x 30 secs Light Frames30 x 30 secs Dark FramesISO 800Skywatcher 200P 8" 1000mm ReflectorEQ5Canon 1100D ModdedBaader MKIII MPCC + Hutech IDAS LPS-D1 FilterHI-RES IMAGE:
  10. You can exploit the changing perspective of the view of a comet from Earth to construct a 3D image. This is my effort using 2 images of the comet taken 24 hours apart - the comet moved over 2 degrees against the background sky allowing the ion tail/dust tail angle to decrease by ~ 5 degrees. Its this change that provides the information your brain needs to see the ion tail stretch away into the distance If you can stereo "free view" with relaxed eyes - use this image - - click this image If you can stereo "free view" with crossed eyes - use this image - - click this image If you have an optical stereo viewer that can be used to view a computer/notebook screen then use the relaxed eyes image pair. Something like an OWL viewer works. The technical cards of both images give details of the comet registration method used to create the 3D effect. Thanks for looking
  11. Comet C/2015 ER61 (PANSTARRS) travelling through Taurus constellation, now passing M45 Pleiades.I've discovered some reflections from inside the optical train (flattener), but don't know any method to remove it from the image.Scope: Skywatcher EVOSTAR 80ED DS-ProMount: HEQ5Pro Camera: QHY168C Filter Optolong L-PRO MAX Luminosity Guiding camera: ZWO ASI120MM Guiding scope: Finderscope 9x50 14x300s exposure at -10°C (70 min total) binning 1x1 10xdarks 10xbias
  12. Comet C2011 L4 PANSTARRS from Kelso on Saturday 30th March. The green colour around the comet nucleus can be caused by the release of chemical compounds such as Cyanogen (CN), Diatomic Carbon (C2) ...& Amidogen (NH2). 5" Takahashi Refractor Pentax K5 iso 800 x1 120sec exposure with extender. No Flat Frames No Dark Frames (Quick & Dirty) Comet C2011 L4 PanSTARRS from Kelso by mikeyscope, on Flickr
  13. Now that ISON has crossed the orbit of Mars, it is time we start contemplating on possible techniques to photograph it. Personally I have a Sky-watcher 200PDS on the HEQ5-PRO goto mount, and my trusty Canon 550D. I have never attempted to photograph a comet before, so would highly appreciate any tip and advice from anyone in these forums.
  14. Comet C/2011 L4 PanSTARRS from Lindean near Selkirk on Saturday 20th April. As Comet PanSTARRS slowly fades it is now possible to get more detail within nucleus as in this image tracking on the comet itself. Had the telescope been guiding on the stars at sidereal rate as usual then the stars would be round but the comet would leave a trail the same length as any star trails in this image, so in this 25min exposure the comet has moved the apparent length of the star trails. 5" Takahashi Refractor (guiding on comet nucleus) Canon 60Da iso 800 x5 300sec exposure with extender. No Flat Frames No Dark Frames (Quick & Dirty) C2011 L4 PanSTARRS - Nucleus Of A Comet by mikeyscope, on Flickr
  15. This is my first light image using my new observatory dome installed last October - thanks to the weather! So the image was taking on the morning of 15th January exactly 3 months after installation. - click image Thanks for looking
  16. I observed comet C/2016 R2 (PANSTARRS) tonight using the 20" dob. I located it using sky safari 5 and was using ethos13 eyepiece (x150). The comet was pretty faint but easy to spot. Switching to ethos8 (x250) it was a fuzzy blob. no core was directly seen. A tail appeared! Switching to ethos10 (x200) the view remained a fuzzy blob with a tail. Probably the ethos8 was the best view. The comet was easier to find than comet Heinze (which I observed on 28th December) probably due to it being more compact.
  17. Comet P/252 (LINEAR) has brightened to over 100x what was expected and is a binocular object in the dawn sky, but is fading rapidly adn the Moon doesn't help. Finder chart at: http://binocularsky.com/binoc_transient.php
  18. Managed a couple of wide landscape style shots of the comet the other day, but Clear(ish) skies tonight towards the western horizon warranted a trip all the way to the bottom of the garden with a 400mm lens. The results are ok, but just pleased to get a decent ish record of the event. Definitely a naked eye object tonight (it was JUST visible on the 13th without visual aids on the western coast). Still, hope you enjoy!
  19. While I wait to capture some star field shots to merge all my comet data with here's a single 300 second frame of the convergence at 5.a.m. here over the coast. Hope you had a chance to at least view it. Amazing thing looking through my 800mm Newt. Look up!
  20. Does anyone have any thoughts on the observing prospects for Comet Panstarrs (2014 Q1) next month? Magnitude readings are pretty impressive while its in transit but its elongation is looking tricky for us Northern hemisphere folk.
  21. Vega

    Excited about 2017?

    First of all, HAPPY NEW YEAR all at SGL! Wishing you all a very enjoyable, prosperous and cloud free year. What are people's thoughts on the year ahead astronomically? I must admit I'm quite excited for the months ahead. There's quite a lot going on up there :-) 3 bright(ish) comets, two of these comets will be in the same constellation in April! All three should easily reach binocular viewing brightness. Then in August there's 'The Big One' if you live in America or are planning on visiting. Even though I wont witness it, I'm still intrigued as to how this will compare to the 1999 eclipse and just what kind of media frenzie the world will get in to on this one. Any other events people are looking forward to this year?
  22. As well as being naked eye visible tonight, comet Lovejoy is absolutely stunning in my 10 x 50s. The nucleas is very bright a fuzzy with a stellar-like core and the tail can also be seen, though ony faintly, streaming off. It's a more rewarding sight in my bins that in my 200p with a 32 m EP. I'm lucky that it's clear for the moment and I'm just in for a tea before nipping out again. The telescope is busy imaging but I'll be gauping at the comet with my bins.
  23. Star101

    Comet41P.gif

    From the album: David Newbury

    Taken Saturday night 9 April17. I set PHD2 to follow the comet which it did while I images 12 x 600 seconds. But then, if you look closely you can see, the Comet passed a star and PHD2 could not decide which bright object to follow. So crashed . Needless to say, I managed to create a GIF out of it. :)
  24. Hi All, Apologies for what may seem like a stupid question, but if have a QSI 683 WSG which has a built in OAG which i use for guiding all the time. I want to try imaging some comets but i'm guessing this is not possible with a OAG. I do have a 60mm guide scope, but wasn't sure if differential flex would come into play as my main scope is around 1.2m F/L Any help or recommendations would be greatly appreciated. Rich.
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