Jump to content

stargazine_ep46_banner.thumb.jpg.34e6cdd5a0856b006a0b47c6373eb9b1.jpg

Recommended Posts

Hello all,

I started a while ago a topic to show my progress on this target over a couple of years.

Now I think I have a final image for this season. I will have to move soon and the clouds don't seem to let me see it again until then. Maybe if I get to travel to a dark site, but then I will go full resolution.

Equipment used is a 130PDS with SW coma corrector, ASI1600MMC camera cooled to ~-15C, put on an AZ-EQ5, guided with OAG. Guiding accuracy was reported between 1.3" and 2" depending on the seeing.

The window frames only allowed me to see the target for ~2.5h/night. Some nights had clouds, some not.

Luminance was taken during 6 or 7 nights for a total of 156x180s frames at unity gain, through a visual CLS filter. That means 7h 48min. The visual CLS seemed to provide better results than the L (IR/UV cut) filter and the coma corrector didn't seem to add chromatic aberrations.

Each RGB channel is made by ~60x60s at unity gain too.

Ha, if I remember well, is just above an hour worth of 60s frames at 300 gain.

I resized the images to 50% since they didn't provide more detail at full resolution due to poor seeing.

Processing was done with StarTools and GIMP. Some star reduction.

Red/white light pollution.

If I missed other significant details that you're interested in, please tell.

16bit .png here: https://drive.google.com/open?id=0ByhJ_xuQxcnjWHU1RWM0OVFmNG8

Or astrobin: http://www.astrobin.com/313011/

Thanks for looking and clear skies!

Alex

 

M33-F585-2017-09-18-LRHaGB_p02.jpg

Edited by moise212
  • Like 5
Link to post
Share on other sites

Create an account or sign in to comment

You need to be a member in order to leave a comment

Create an account

Sign up for a new account in our community. It's easy!

Register a new account

Sign in

Already have an account? Sign in here.

Sign In Now
  • Recently Browsing   0 members

    No registered users viewing this page.

  • Similar Content

    • By chops
      I'm posting in the hope it helps anyone else considering a Daystar Scout SS60. The video's not quite representative of what one sees looking through the scope, but gives a general idea of field of view through a 24mm EP.  When observing, much more prominence detail and surface texture is visible to the eye and the colour feels less red than it appears in the vid.
      I'd have taken this video sooner if I'd realised that afocal video would work so well, so I'll try again next time the sun's available earlier in the day during better seeing. The video's taken by holding an iPhone against an Explore Scientific 24mm eyepiece and adjusting exposure (i.e. afocal video photography). Although I find a Plossl as easy (if not easier) to use as a wide EP for observing, it's simpler to align a smartphone with an eyepiece that has a wider field of view, for afocal video. Hence I used a 24mm ExSc (see below for detail). It seems a fairly quiet solar day, not long after the notoriously quiet 2020 and I believe is still close to the beginning of the sun's new 11 year cycle (hopefully it will become more exciting soon but not as exciting as having any Carrington Events pointing towards us).
      I spent some hours, from late morning, watching these prominences form, dissipate and reform. The prom on the Western limb was very tall and bright, looking like a large rectangular tower block, which gradually split, faded as the top looped over to the north, then the top looped back again to the south. At one point this loop appeared to join - forming the outline of the head of a man, whose figure, with arms out, was clear and rather funny. Wish I'd taken this video sooner (or had the ASI183 to hand). The prom quietened and reached its current state (3pm ish) as seen in the video.
      The long group of prominences to the South - 4 main and some smaller - were more dim than the prom on the Western limb initially, but they remained impressive, ranging from good to very small and appeared at one point to be as clear row of pine trees, especially the larger right hand prom, with spiky 'branches' and a distinctive triangular fir tree shape, which gradually brightened then faded to this view. The tip of the ‘sharks fin’ to the left of the group extended out to the east then receded.
      I'm afraid it's not easy to see the detail in such a simple video - it's slighly more visible to the naked eye. By the time I took this video it had gone 3pm, there was more haze and a lower sun and none of the prominences were particularly impressive.
      There were No sunspots easily visible, although a Plage appeared to be visible close to the Westerly limb. Little surface detail other than orange peel, despite tuning the scope (better with the SS60s dial to left of centre for this today). I still need to lots more time with the scope to get the best from it.
      I'm a Ha beginner having only observed in whitelight before and only having used this scope twice before, once in combination with a ZWO ASI 183MC astrophotography video camera. Medium seeing, 6/3/21 'third light' on the Daystar Scout SS60 Scope with fixed chromasphere quark built in - 930mm f15 60mm.
      Various Eye pieces used: Plossl 40mm, Meade Super Plossl 26mm, Explore Scientific 24mm and 11mm 82 and 68 degree EPs gave good clarity and contrast, but the seeing's not good enough for close viewing of proms.  ioptron motor, roughly pointed north was perfectly sufficiently good to keep the sun in view for at least 45 mins at a time. I'll edit this post to add a pic or two of the equipment setup in a moment.
      3 images attached are: Afocal Smartphone still image (contrast increased in smartphont), plus two shots of the setup.
       



    • By MarsG76
      Hi all,
      My current image, still WIP, but I'm sharing this Hydrogen Alpha image as I thought it looked ok...
      This is NGC3603 and NGC3576 (AKA The "Statue of Liberty" nebula), a massive H-Alpha region containing a very compact open cluster, located in the constellation "Carina" about 20,000LY away.
       
      I took this photo on the night of 19th February 2021 using my cooled and full spectrum modded Canon 40D DSLR attached to a 80mm f6.25 refractor on a CGEM equatorial mount.
       
      Exposure time was 3 Hours and 50 minutes (6x600sec, 6x900sec and 4x1200 sec subs), using a 7nm Hydrogen Alpha filter.
       
      I'm still working on the narrowband color image, but this image is quite possibly my last image that I'll produce using just the DSLR before my ZWO2600MM arrives.
       
      CS,
      MG 

    • By alexbb
      This is another finished target for this season.
      I (quite) recently bought a TS Photoline 102 ED with FPL53 which performs surprisingly well for a doublet. So I put it to tests and imaging, in parallel with an older FPL51 AstroProfessional 102 ED doublet.
      The blue color correction is much better in the newer TS. I shoot luminance often with both and then take the highlights from the better scope.
      For this image I also used some older data that I had available, shot with a 130PDS, but that maybe only made my life more difficult. Not that otherwise I shot data through the refractors in a single panel with reducers/correctors, but also in 2 panels with no reducing correctors. Same about the RGB. Some shorter exposures from the backyard, some from a dark site, most of the G data from a dark site, B and R from home (clouds came in at the dark site) and a lot of other adventures.
      But in the end I managed to put them all together and made an image out of them.
      You can watch it in full resolution and see other details on astrobin: Great Orion Nebula
      Clear skies!
      Alex

    • By DaveS
      Finally I have something like First Light with the ODK12. This is just 6 x 600 sec subs Luminance with the Moravian G3 16200 and Chroma filters. Sigma Add stacking in AstroArt 7 followed by a slight crop to get rid of dither edges, Gradient Reduction (As the moon was starting to interfere), DDP and Unsharp Mask.
      Calibration was with Darks and Flats only as I had neglected to do Dark Flats *slapped wrist*.

      Reduced 50% for upload and JPEG. Yes it's a bit noisy, and I think I may have focus issues.
      C&C welcome as usual. 
    • By Anthony RS
      Selling the Astronomik 12nm clip in Ha filter for 120€. Bought it for 270 usd including vat, customs and shipping so it's a really good price.

      The filter is still in excellent condition, used only twice. No fingerprints, no scratches not even dust (image attached).

      I will also handle the shipping through my post office without cost. If another shipping method is requested, then we'll have to to discuss the price.

      Contact me if interested.

      Clear Skies,
      Anthony

×
×
  • Create New...

Important Information

We have placed cookies on your device to help make this website better. You can adjust your cookie settings, otherwise we'll assume you're okay to continue. By using this site, you agree to our Terms of Use.