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Jarvo

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Posts posted by Jarvo

  1. Hi All. Just trying out the new laptop with some older data. 

    I think I'm off to Venus for my first post lockdown break - should be less hassle than the A64.

    This is what I think it will look like on final approach. Factor 15 at the ready.

    I used my beloved Esprit 100 with a 2.5 Powermate, a QHYIII290m camera and used Sharpcap software. 600 frames stacked in Registax and some very minor cosmetic tweaks performed in Gimp.

    Thanks for looking

    Steve

    Venus.jpg

    • Like 2
  2. Hi all. I’m trying to figure out how or if I can try dithering with my current set up. 

    The scope is perfectly suitable (Esprit 100) Got a good guide scope QHY one and even the old 10mp DSLR  does the trick but I am plagued by walking noise on my images. 

    The mount is an EQ5 with go to and a standard ST4(?) autoguiding port. 

    Just want to know whether with this mount and port I can dither or am I due a beefy upgrade. 

    Any guidance (ha!) or tips would be warmly received.

    Thanks all

    Steve

  3. Hi All.  Just in the middle of processing a pinwheel and was hoping for some steer from the community.

    Much as I try to tweak the levels of my images over several iterations the data gradually gets worse whilst the false colour increases.

    Don't worry about vignetting I'm getting a field flattener soon. Its more what is the best way forward to remove the noise and false colour.

    Happy for all advice no matter how constructive.

    Thanks in advance

    Steve

    M101 Pinwheel test.jpg

  4. Hi All

    I was aiming to image the Needle Galaxy last night but Moonlight made it too difficult for me to jump to it (not many bright stars in that are at the best of times).

    So I thought I'd have a stab at M104 - my favourite Galaxy (I've got a poster of it in the Observatory).

    Its relatively easy to find with its own little set of pointers to the final site.

    Got just under an hour of data but I've learned to be a bit picky with the raw data so ended up only choosing 38 x 1 minutes of data plus 3 darks.

    Kit was my trusty Esprit 100 and my tired old Olympus E420 (I've just realised it's 14 years old !!).

    Its a bit grainy but I can see its dust lane which I am pleased with.

    Thanks for looking and stay safe.

    Steve

     

    M104.jpg

    • Like 7
  5. Hi All - wondering is I can reach out for some help.

    So I took this image the other night which I'm pretty pleased with but there are some artefacts across the image which I'm struggling to process out.

    I've used GIMP to do several iterations of Levels adjustment, cropped out the vignetting and sharpened it but he artefacts remain.

    Is it light pollution, can it be processed out?

    More than happy for anyone to take a shot but would be grateful for any technical secrets you may have.

    **Uploaded a  .png file so you can see it :)  (Thanks for the steer Bryan

    Thanks in advance

    Steve

     

     

    M51ii stacked3003.png

    M51ii stacked3003ii.png

    • Like 1
  6. Hi All

    After a few false starts this week the air was still enough last night so I went for it.

    And everything went near perfect - I found the target straight away, I got the focusing pretty much bob on, the tracking was the best I've ever experienced, I was disciplined and discarded any with egg shaped stars (only a few mind).

    I managed to get 62 minutes of data (62 x 60") at ISO 800 plus 3 darks using the trusty old Olympus E420 coupled to my beloved Esprit 100. No filters.

    Skies were clear (obviously!) but the Light Pollution in Morley is horrendous. My areas classed as an Bortle 8 but with the street lamp shining in my garden I put is at a 9.

    I cannot explain just how pleased I am with this shot - It's probably the best one I've take. Yes I know they're not going to replace Hubble with me and my Esprit but so what? (Although I'm sure there are some people who would like to strap me to a rocket and send me up ! )

    Did a bit of experimentation with the difference processing options in Deep Sky Stacker and this was the result.

    Thanks for looking.

    Steve

    M51ii stacked.jpg

    • Like 1
  7. It was so nice yesterday I had to go out in the evening. 

    Spring time galaxy hunting has always been a bit of a damp squib where I live in Leeds. The light pollution and modest equipment has always rendered the evenings a bit muted. 

    But without the planets about I decided to have another go. 

    With expectations lowered I set off and headed towards Leo. What I did find surprising was how easily I managed to find objects. Previously trying to find faint galaxies with an F/15 Mak was pretty fruitless but with the Esprit 100 at F/5.5 the faint smudges were much easier to find. 
     

    M65 and M66 were there. That’s pretty much it. No structure visible but thats a combination of modest kit and light pollution but also the observers experience of picking out detail which comes with practice.
     

    Stayed for a while using a variety of magnifications but increased magnification did not make much difference. 
     

    At this point it sounds like I should have been disappointed but far from it. 
     

    Moving on I noticed that Virgo was up and confidently decided to look for a personal favourite M104 (The Sombrero Galaxy). 
     

    Took a couple of goes but that was my fault. The galaxy has 3 small stars in a line in the same field of view which helps. 
     

    Again I couldn’t discern any detail,  just a very faint glow against the light polluted backdrop. I was hoping to get a glimpse of the dust band but had to settle for the satisfaction of finding a favourite from the books plus I know where to look if I want to attempt to take an image. 
     

    Finally I skipped over to M51. Easily located.  The centers of both galaxies visible but no spiral structure.

    By this time it was getting late so decided to pack up.

    This write up read like I was perhaps disappointed with the evening but in reality I wasn’t. I was happy to be out in the fresh air, I tracked and found the objects with relative ease and I managed to find one of my favourites in M104 (although I could have looked over my shoulder at the poster of it I have in the observatory for a better view!).

    This afternoon thanks to this site I found a very handy application called Clear Outside it turns out my back garden is Bortle 8  (out of 9) and that doesn’t include the street light to the South.

    So I take solace from the fact I can still find some faint galaxies from my back yard against the backdrop of heavily light polluted skies and I regards myself as a novice galaxy hunter. 
     

    Thanks for looking.

     

    Steve

     

     

    • Like 12
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