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Found 11 results

  1. MarsG76

    M17 - SHO

    From the album: Deep Sky Imaging

    The Omega Nebula, aka The swan Nebula, M17/NGC6618 imaged in Narrowband and combined in Hubble palette style. The photo was imaged with a astromodded and cooled DSLR through a 8" SCT across multiple networks gets from 28 July - 8 August 2019.

    © Mariusz Goralski

  2. A great, if short night at Seething. Finally a dark Friday night with no moon. Was about half ten when we started, a quick look at Jupiter, with Callisto very close to the 'top' almost grazing the upper edge. Main belts visible, but not the best of views. Moved onto Epsilon Lyra, the double double, easily split the lower pair, but not the upper. Spent ages 'faffing' with the slow mo controls East of Izar until I found Comet C2015 Johnson, thrilled to do so in my 3"Tak, best view was with a 15mm Panoptic; was too dark in the 9mm. It wasn't a night for Galaxies, I had planned (hoped) to spend time in Virgo looking at Markarian's chain, but struggled to see M65/M66 in Leo, even the view of M81/M82 wasn't great. Newbie error was that I didn't put the dew heaters on until too late, despite all the sunshine and heat of the day, by 1am was so damp. The new DewZapper tape was put to use on the eyepieces for the first time and can confirm it's a super, well made product. After a coffee moved onto M3, an easy find, about a third of the way along from Arcturus to Cor Caroli, and then to the globulars of Ophiuchus. I managed 10, 12 and 14 and even 107. It was then that I realised that twinkling low down star was Antares, so a quick look at Saturn; always a beautiful sight, but again not the clearest of views before finding the compact Globular Cluster M80, small but one I rarely get the opportunity to observe. By contrast M4 is mahoosive! Just West of Antares, low down, easier to find, it's I think one of the closest to us(?) i moved up to Aquilla and followed a line of faint stars to Scutum for M11, the Wild Duck Cluster a favourite - it's an Open Cluster that looks like it could be a Globular, anyway a lovely view, I couldn't find M26, lost I think in the clouds of the Milky Way...but moved across to the Eagle, not the greatest of views, even with a UHC filter, but underneath, almost in the same field of view in the Panoptic, was the Swan and did it look like a swan, albeit upside down, but there it was! #Stoked. Having seen the Swan and Eagle and spent time just enjoying seeing them, I realised that there was a chance of the 'elusive' Lagoon. We rarely get the chance to see this from Seething, it's just too low, but found it and spent ages enjoying the view, with and without a filter. I'd been joined by another NAS member, who'd come let me know that he was leaving and that I'd be the last one on site, he'd stayed to 'just have a quick look' at the Wild Duck Cluster, but hadn't seen any of the objects we'd been looking at afterwards, so he was as delighted to see the Lagoon as I was. We then moved onto look for M22, the "Star Cloud" and saw M28 on the way, but couldn't find M22; it was only when I looked up to the Plough to get my bearings that I realised that the stars were fading, but not through cloud, by about 02:30 it was too light. Sunrise was coming. So not the night that I'd planned and hoped for, no Galaxies in Virgo and too light to see any of the objects in Sagittarius as that rose, but I live for nights like this and the opportunity to see the more Southerly objects, all the better to share the views too, with an equally enthusiastic observer. Let's hope we get more of the same this Summer. Chris
  3. I'm back ! It seems AP is a real slow-burn hobby for me, I'm only really getting chances to take about 3-4 pics per year at the moment. Still, hopefully there'll be plenty of targets left for me when I eventually retire and can get that dream full frame set-point cooled CCD and all the filters. Anyway, here's the latest, taken in August: (click through for full version) About 30 or so lights, a mix of 5min and 7min exposures over 3 nights (well two nights, the middle one was abandoned to cloud), ISO1600, darks, flats and bias, equipment as per sig, modded DSLR, processed in Pixinsight. Hope you like it, I'm quite pleased with it. C & CC welcome. The Swan Nebula, also known as the Omega Nebula or the Horseshoe Nebula (M17) is an H II region in the constellation Sagittarius. It is located in the rich starfields of the Sagittarius area of the Milky Way. The Swan Nebula is between 5,000 and 6,000 light-years from Earth and it spans some 15 light-years in diameter. The cloud of interstellar matter of which this nebula is a part is roughly 40 light-years in diameter and has a mass of 30,000 solar masses. The total mass of the Swan Nebula is an estimated 800 solar masses. It is considered one of the brightest and most massive star-forming regions of our galaxy. Its local geometry is similar to the Orion Nebula except that it is viewed edge-on rather than face-on. The open cluster NGC 6618 lies embedded in the nebulosity and causes the gases of the nebula to shine due to radiation from these hot, young stars. It is also one of the youngest clusters known, with an age of just 1 million years.
  4. The Omega Nebula Took this photo of the Omega Nebula during September 2015. 4.5 Hours of Ha 45 Min of RGB Telescope: Skywatcher P250 Mount; ASA DDM60 Camera: QSI583 Mono Filters: Astrodon Ha 3nm, RGB Gen2 http://www.flickr.com/photos/101543943@N04/21957544470/in/dateposted/ Thanks for watching! Haim
  5. Here is the 2nd image i have taken on my new Mach1 GTO. I had a few dithering issues with the first image but have got that sorted out. This is only 9x600s subs with no calib files in 7nm HA. Very minimal processing in pixinsight and photoshop. This target is very low in my sky and only available for about 2 hours max so i got 1.5 on this for the time being. Maybe collect some OIII and SII in the coming nights. Possibly some RGB to do a HARGB. The guiding so far down south for me was a bit tricky and jumpy but the subs came out ok. Seeing started out ok but as the night went on it got a bit hazy due to humidity here.
  6. Omega Nebula in Sagittarius ( Messier 17, NGC 6618 ). Visible to the naked eye the Omega Nebula, also known as the Swan, Horseshoe or Lobster Nebula, M17 is in the Milkyway and is aound 4200 light years distance from Earth Links: 500px.com/MikeODay photo.net/photos/MikeODay Details: RA 18h 22m, Dec -16deg 10'. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion Short Tube 80mm guide scope and auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. 37 x 100 sec ISO800. Pixinsight & Photoshop 14 August 2015 - processed 3 Oct 2015
  7. This is the first processed image from the data I gathered on our 3 nights national astro party The site is 1730m above sea level and gives much better seeing than my usual dark site (850m ASL). I'm a big fan of William Optics (the swan is their logo) and own two of their scopes - ZS 110 triplet and ZS 66SD. Both are in the game for this image of M17 - The Swan nebula All details are in AstroBin but let write them here in short: - WO ZS 110 + WO FRIII 0.8x, Modified 550D, EM-200, WO ZS 66SD as guide. - 19x7min = 2h 13min, ISO 1600, no calibration - only dithering - APT, PHD, DSS, PS CS3
  8. Hi all, As I'm slowly going through my data from July, this time I processed the RGB data of the Swan Nebula. This Nebula can really use a bit more magnification, so now I'm thinking of revisiting it with my SCT next season. At this focal length it's too small, but 1280mm or 2032mm through the 8" SCT should make it more impressive. I still have the narrowband data to process so hopefully the SHO image will turn out more dynamic. The total exposure time on this image is only 55 minutes, 20x60 second, 12x150 second and only 1 of 300 second subs, all at ISO1600. Taken with a modded 40D through a 80mm refractor at 500mm FL. Clear Skies, MG.
  9. MarsG76

    M17 Pseudo RGB

    From the album: Deep Sky Imaging

    The Omega Nebula, aka The swan Nebula, M17/NGC6618 imaged in Narrowband hAo3hB as RGB. The photo was imaged with a astromodded and cooled DSLR through a 8" SCT across multiple networks gets from 28 July - 4 August 2019.

    © Mariusz Goralski

  10. Observation 25-26 July 2017 Date: 25-26th July 2017 @ 19:50 – 2:30AEST Location: Backyard Equipment: 14” Skywatcher GOTO Dobsonian, Televue 31mm Nagler T5 , Televue 17mm Ethos, Televue 11mm Nagler T6, Televue 2X Powermate, Baader Neodymium, Baader Contrast Booster, Astronomik UHC filter. The first thing I noticed from the beginning is that there was more sky glow than I would like, it was quite obvious that the seeing won't be perfect. I keep hunting for maximum magnification and detail on planets so before observation I re-collimated the Dobsonian from scratch. This time I put a white piece of paper behind the secondary so it was easier to see if the secondary mirror is circular and centered. Second step was to use the laser to collimate but noticed that when I touched or span the laser, its reflection changed, so using it is pointless without first collimating the collimator (what da?) and proceeded to use the Cheshire. As a final step I tweaked the collimation on Saturn and a nearby star. Saturn: Saturn looked soft and fuzzy. The Cassini division was barely hinting itself in and out of a shade like apparition on the outer edges of the rings. There were 5 soft moons around it, but I knew that the seeing was too poor to properly test the collimation tonight. After a disappointing start tonight when comparing to my hope and expectation, while observing Saturn at 150X, at 20:40 (iPhone time, 20:38 "Star Walk" time) a bright satellite flew past and through Saturn. The flyby was not slow but wasn't as fast as a shooting star either. When checking for satellites on the "Star Walk" app, it turned out to be "Envisat". It is rare views like this that make a view memorable and special, by adding a bit of action to the scene. After seeing that Saturn looked quite soft and with the considerable amount of sky glow, I wasn't expecting to get the best views so I took the lazy approach to observing tonight and, after accurately star aligning the scope, selected the objects above 40 degrees in order from the "Deep-Sky Tour" option on the SW14 hand controller. Lagoon Nebula (M8): M8 was visible the same as I saw it last time I was observing and as before the sky glow killed all of the fine detail that I saw back in May. Again the main part of the nebula was visible, the dark lane was there, with a hint of structure with in it, as well as the faint nebulosity around the main “Lagoon” coming into view at 50X and 100X power. During dark nights, there is a lot more visible, especially detail wise within and around the nebula, but unfortunately tonight, that was washed away. As with most nebulae, the best way to view this nebula is by using the UHC filter. Omega Nebula (M17): At 50X and 100X the “Swan” is easily visible, along with some of the outer nebulae coming into view faintly around the “Swan”, particularly behind it. Higher magnification, 200X, the structure and shading was once again very easily visible within the Swan head and body. The use of the UHC filter is a must on this nebula to see all of the details. Still a lot of detail is visible for such a bright sky glow seeing condition. Eagle Nebula (M16): The "E" shape was quite easily visible, not as obvious as during a darker night but still visible among the stars in and around the nebula. I’m very sure that at 200X magnification and using the UHC filter, I saw the “dark pillar”, the middle one out of the “Pillars of creation”, the one with “squiggle” at the bottom of it in the photographs. At 100X there was a quite obvious dark shading where the dark pillar is situated. At first I thought it might be wishful thinking and talking myself into believing that I’m seeing hints of one of the pillars, as the seeing and transparency conditions are not the best, but the more I looked in the area, the more I was seeing a distinct elongated darkening at the correct spot, just under the two brighter stars within the nebula. Pavo Globular Cluster: The Pavo Globular is a very nice looking Globular cluster. At 200X it looked like a typical globular except that it has, what looks like, more brighter individual stars sprinkled at the foreground with the Globular shimmering behind it, a few scattered stars at the edges and one particularly bright star toward edge at the top left. This Globular is not as big as 47Tuc or the Omega Cluster but at higher power, it looks just as nice and interesting. This Globular is definitely in my top 3 Globular Clusters to view to date and I will make the effort to image it hopefully in the not too distant future. Butterfly Cluster: An open star cluster with a bright orange star within that drew attention to itself. At 50-100X magnification it sits nicely within the FOV of both the 31mm Nagler and 17mm Ethos. The Butterfly Cluster is a medium sized open star cluster and with the orange star glowing within it reminds me of two other objects, it sort of resembles the cluster within the center of the Rosette nebula with a touch of the orange jewel from the Jewel Box cluster in Crux. Trifid Nebula (M20): The nebula was surprisingly easy to see tonight considering the glow, but the dark lanes are easily visible, within the easy to see with direct vision, “Trifid”, the double star in the center is easily split and the blue nebula haze is quite easily visible to the right of the “Trifid”. The best way to see M20 was at 100X and 200X magnification and using the UHC filter, although the wide angle view with the 31mm Nagler did give a nice contrasty view of the nebula floating in space, with the wide angle, it was like looking out of a space craft port hole. Comparing the view of the Trifid Nebula to how I saw it from a dark location through the 8", it looked about the same, so not bad for seeing the same view but from a much brighter and worse seeing condition sky. Globular (M4): M4 is quite a small Globular cluster in Scorpius near Antares on the eastern side. This globular needed 200X magnification to resolve its core into granulated stars. Globular (M5): Another Globular Cluster picked from the SW14 deep sky tour hand controller. This Globular is quite bright and looks quite nice in the eyepiece, definitely a considerable amount brighter than, for example, M4 and M80. This Globular looks tightly packed at the core, where the granulation is visible at 100X very easily, and less dense sprinkling of stars at the edges. This Globular Cluster is a worthwhile object to observe during a night of observation. Wild Duck Cluster: This cluster is something different, heaps of stars quite tightly packed, looking almost like fireflies rather than wild ducks. There was the shimmer visible through it which gave it a “being alive effect", it is a good sight at 50X and 100X magnifications. As most objects, this one would really benefit from a dark transparent sky to have the "fireflies" as sharp pin points of light since tonight it sort of looked soft focused. Globular (M2): Another small globular needing 200X to resolve stars at the core, this one seemed tightly packed. I just had a quick look and moved on. Maybe I should have studied it a bit longer but initially it resembled M4 and other small globulars. Globular (M22): M22 is a bright Globular Cluster in Sagittarius. The Sagittarius and Scorpio constellations have, by the look of it, a lot of different types of Globular Clusters. M22 is almost as impressive as the Pavo Globular cluster, it is almost as bright and big as the one in Pavo which places it in close position four of my favorite globulars to date. At 100X I saw a dense core with less dense randomly sprinkled brighter stars at the outer edges. Definitely worth a visit. Globular (M28): M28 is another smallish Globular, not too dim, and a bit bigger than and not as faint as M4. This Globular looks good at 200X. Southern Pinwheel Galaxy (M83): Tonight the view of the galaxy was disappointing at best, all that was visible tonight was the glow of the core, no spiral arms were visible at all at any magnification, 50X-200X. Not even the “S” shape coming through, simply the sky was not transparent enough and I guess it didn't help for it to be getting quite low toward the west. Saturn Nebula: As the last time I looked at this planetary Nebula, it was a fuzzy greenish oval, looking almost as if it's always out of focus, only knowing I was focused by the stars near it. 300X needed to see a decent size, but still looking like a featureless oval that is poorly focused, UHC filter didn't help either. Looking at the Hubble image is obvious why it is looking out of focus. It is a planetary nebula within a fainter more diffuse nebula with a bar structure flowing through it, so at a lower resolution, fainter monochromatic view, the more diffuse nebula flows into the central nebula resulting with a fuzz oval view. Helix Nebula: The "Eye of God" initially looked like a smokey oval which was quite hard to see with no central star and initially only showed dimmer fuzzy center. I stopped observing at about 23:00 because I wanted to see the Helix Nebula higher up in the sky so I decided to comeback to the Helix later. I left the scope tracking on the Helix Nebula for almost 2 hours, and returning at 01:30 when it was much higher in the sky, I was pleasantly surprised that it was still in the FOV... not center any more but still in the 100X magnified Ethos eyepiece FOV. Using the UHC filter the smokey ring was much easier to see than before, when it was lower in the eastern horizon. The smoke ring was defined with a dimmer center, the top and bottom parts of the ring were noticeably brighter with the central neutron star visible when using averted vision. Some of the main stars that I remember in the image I took a while ago were also visible there around the smoke ring. The view in the 8" did not reveal as much detail even though I tried to observe it in a darker sky condition. Not bad for what I saw during a milky bright sky. I was under the impression that there was little or no difference between the 14" and the 8", but after seeing the difference in the Helix Nebula, perhaps I was wrong, and just have the wrong idea of what 3X light gathering power really means. I wonder how it will look under a dark, crystal clear sky. The view without the UHC filter made the central neutron star just barely visible with direct vision, along with the stars around the nebula but the nebula was a lot less obvious, still hinted at some nebulosity, but the structure was not discernible. Under a darker sky I'm sure the view will be staggering. M80: Much like M4 except a little bit fainter. M80 is near Antares on the other, western side. This Globular Cluster needed 200X to resolve the sprinkling of stars that seem to be more sparse at the edges. M9: This is a small and faint Globular cluster that needed to be magnified 200X to see any granulation through it but it is still small when comparing to The Pavo Globular Cluster, M22 or even M4 or M80. 300X was needed to see it at a decent scale where it was still a fair bit fainter than the other globs I observed tonight but at this power it had quite obvious star separation visible in the form of granulation all the way into the core. Neptune: At 150X Neptune was a tiny, pale blue disc not much bigger than the bright stars near it. There is no hope to see any detail in the atmosphere of Neptune so any more magnification is pointless, plus the atmospheric conditions wouldn't allow for it anyway, but it was a tighter point of light than last time I targeted it. It also was a lot higher in the sky. Seeing was quite poor tonight coupled with a lot of obvious sky glow visible to a level where the sky looked milky when dark adapted, resulting in loss of contrast and transparency causing fuzzy views and lack of details. The poor transparency was particularly visible on the brighter nebulae such as M8. The poor seeing also made it impossible to tell whether tonights careful collimation helped the ability to get crisp detail at above 400X magnification. As night went on, the condition improved slightly but still nowhere near the best seeing conditions which I experienced in May. The slight improvement in seeing conditions, along with being higher in the sky, might have been the reason for the increased details and features that I saw on the Helix Nebula after coming back to it 2 hours later. Looking at the objects I bagged tonight, most of the them, by far, were Globular Clusters so I guess tonight was a "night of the Globular". After not expecting too much due to the seeing and taking the lazy Deep-Sky Tour option tonight, I did get a few nice surprises, namely the Helix Nebula, a possible pillar of creation in the eagle and a few nice and bright Globular Clusters, few of which I saw for the first time. I noticed Pegasus/Andromeda at 02:30 as I was packing up and so I tried to find M31 with the binoculars but it was too low in the north, in the direction of many street lights that washed any hint of it away... I guess I'm situated to far south. If you read this novel of ramblings of a astro-nut to the end, thank you and congratulations. Clear skies.
  11. Omega Nebula in Sagittarius ( Messier 17 , NGC 6618 ) ( click on image to see larger ) Omega Nebula in Sagittarius ( Messier 17, NGC 6618 ). Visible to the naked eye the Omega Nebula (also known as the Swan, Horseshoe or Lobster Nebula) M17 is in the Milkyway and is aound 4200 light years distance from Earth. Links: 500px.com/MikeODay photo.net/photos/MikeODay Details: RA 18h 22m, Dec -16deg 10'. Skywatcher Quattro 10" f4 Newtonian. Skywatcher AZ Eq6 GT Mount Orion Short Tube 80mm guide scope & auto guider - PHD2. Baader MPCC Mark 3 Coma Corrector, UHC-S 'Nebula' filter. Nikon D5300 (unmodified). Field of view (deg) ~ 1.35 x 0.90. 37 x 100 sec ISO800. Pixinsight & Photoshop 14 August 2015 re-processed 8 Aug 2016 with current workflow.
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