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EAA Monthly Observing Challenge - May 2022

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#76 Alien Observatory

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Posted 26 May 2022 - 10:55 AM

I did a very poor job in describing Stephenson 1.  It is a very small open cluster located in Lyra.  It is very close to a massive red giant, Delta 2 Lyra.  Pat Utah smile.gif

I was wrong on this post "clarifying" Ste1.  It is not a very small cluster, but a larger open cluster.  It contains Both a massive red giant and the smaller blue star and several others surrounding the area.  After a lot of looking I found 2 related images to verify the size of Ste1.   Apologies to all for the miss-information...

 

Stellina Image, 2 minutes, 10 sec subs, Bin 1, Gain 20 db.....Pat Utah smile.gif

Attached Thumbnails

  • Ste1_May_25_2022.jpeg
  • stephenson1.jpg
  • Stephenson_1-706x473.jpg

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#77 Alien Observatory

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Posted 26 May 2022 - 11:02 AM

M57 in a massive star field.  Stellina, Bin 1, 10 minutes, 10 sec subs, 20db gain.   Pat Utah smile.gif

Attached Thumbnails

  • M57_May_25_2022.jpeg

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#78 steveincolo

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Posted 26 May 2022 - 11:43 AM

Thanks Pat for the challenge!  Had a great time last night with the objects I'm able to see from my deck (house and tree obstructions) at 40 degrees N latitude.  C8 at 793mm, 0.63x x 2 (79.5mm backfocus), ZWO EFW with ZWO LRGBSHO, ASI290MM at 300 gain.  10 second subs for LRGB filters, 30 second subs for SHO filters.

 

M5

Messier 5 25May22 22 54 27
 
M57 (second time, I viewed it in the early hours of May 1).
Messier 57 26May22 00 47 32

 

M82

Messier 82 25May22 22 36 37

 

NGC 5466

NGC 5466 25May22 22 21 25
 
Stephenson 1.  Some nice chains of fainter stars here, not sure if they're part of the OC.
Stephenson 1 26May22 00 05 12
 
Bonus images:  M82 and M57 in LSHO.  SII maps to red, Ha to green, OIII to blue.
 
M82.  The active Ha area (in green) is pretty obvious.
Messier 82 25May22 22 39 57
 
M57.  Obvious Ha and OIII regions.
Messier 57 26May22 00 53 12 -- SHO

 

 

 

 


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#79 SC_astro

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Posted 26 May 2022 - 08:08 PM

All images taken in my driveway with Bortle 5 sky with Celestron C8 Edge / .7 Celestron FR / Asi294mc / AVX mount / Sharpcap 4 Pro / Phd2 using flats and darks. Cropped

 

M82 - 29 frames @ 25 sec

M82 Stack 29frames 725s WithDisplayStretch
 

M57 - 31 frames @ 8 sec

M57 Stack 31frames 248s WithDisplayStretch

 

NGC4490 - 74 frames @ 20 sec

NGC4490 Stack 74frames 1480s WithDisplayStretch

 

NGC5466 - 22 frames @ 25 sec

NGC5466 Stack 22frames 550s WithDisplayStretch

 

M94 100 frames at 12 sec

M94 Stack 100frames 1200s WithDisplayStretch

 

M5 47 frames @ 8 sec

M5 Stack 47frames 376s WithDisplayStretch

 


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#80 MarMax

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Posted 26 May 2022 - 08:21 PM

I was wrong on this post "clarifying" Ste1.  It is not a very small cluster, but a larger open cluster.  It contains Both a massive red giant and the smaller blue star and several others surrounding the area.  After a lot of looking I found 2 related images to verify the size of Ste1.   Apologies to all for the miss-information...

 

Stellina Image, 2 minutes, 10 sec subs, Bin 1, Gain 20 db.....Pat Utah smile.gif

OK, based on now finally having a clue regarding what Ste1 is, I'm attaching a new crop. EDITED for specs, same as before, C11 f/2, QHY183C with IDAS-LPS-D3 filter, dark and flat applied, gradient removal, 10" / 5'.

 

A 2nd EDIT added to say that the two red/blue pairs of stars are really interesting. The main giants and then the smaller pair on the left.

 

Ste1cropR2_30F_300S_NoEdit_05222022s.jpg


Edited by MarMax, 26 May 2022 - 08:37 PM.

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#81 russ75

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Posted Yesterday, 12:50 PM

(10) Hygiea
28 May 2022 04:30UT

 

First light with my ZWO ASI482MC, lashed to an Orion ST-80 (80mm f/5), with 2x Barlow spaced to approximately 1.5x, and Baader Fringe Killer filter. This screenshot was taken while capturing a one-hour long sequence. It is a live-stack of 11 fifteen-second images. Gain 400.

 

I'm working on getting the color balance right with this combo. Lots of green coming through. Darks and flats obviously need work too. The Minor Planet Center ephemeris for this asteroid put it at magnitude 9.9 and moving (slowly) at 18 arcseconds per hour.

 

gallery_30736_15615_241758.png

 

The image below is the same screenshot as above with Lowell Observatory finder chart for (10) Hygiea superimposed and alternating with the captured image to confirm the asteroid identification. The green shape is from the Lowell Observatory's finder chart. It shows the amount of movement, and direction of movement, of the asteroid over a one hour period.

 

gallery_30736_15615_85310.gif


Edited by russ75, Yesterday, 12:51 PM.

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#82 BrentKnight

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Posted Yesterday, 07:15 PM

Not making great progress on the excellent list this month, but I did grab another capture of M82 with the C8, ASI294MM-P and the F6.3 FF/FR.

 

M82 135 frames 2025s (33.75m)
15"/34'/G:200.
 
I just got the Optolong 7nm H-alpha filter and I'm wondering if it would work on this galaxy to bring out all that explosive detail coming out of the center?

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#83 steveincolo

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Posted Yesterday, 08:19 PM

 

Not making great progress on the excellent list this month, but I did grab another capture of M82 with the C8,ASI294MM-P and the F6.3 FF/FR.

 

 
15"/34'/G:200.
 
I just got the Optolong 7nm H-alpha filter and I'm wondering if it would work on this galaxy to bring out all that explosive detail coming out of the center?

 

Worth trying!  That active Ha region is pretty bright, I have an LSHO view above and the green really stands out. 


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#84 BrentKnight

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Posted Yesterday, 08:50 PM

Worth trying!  That active Ha region is pretty bright, I have an LSHO view above and the green really stands out. 

Clear skies this evening, and the filter is still mounted from last night.  I'll post results...


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#85 MarMax

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Posted Yesterday, 09:29 PM

 

Not making great progress on the excellent list this month, but I did grab another capture of M82 with the C8, ASI294MM-P and the F6.3 FF/FR.

 

 
15"/34'/G:200.
 
I just got the Optolong 7nm H-alpha filter and I'm wondering if it would work on this galaxy to bring out all that explosive detail coming out of the center?

 

Brent, I'd say it's definitely worth a try. I just picked up the Antlia ALP-T Highspeed and I'm dying to try it out but since I got it the clouds have rolled in. After making many bad decisions in my EAA quest the one thing that always seems to work is some reasonable experimentation. I tend to get wrapped up in researching and fail to try new things that are not backed up by the research.

 

My latest experiment is adjusting the white balance (R-G-B) of the QHY183C with the ALP-T filter to be something close to normal when taking flats. The one thing you can spend time on when it's cloudy is taking flats . . . lol. Anyway, with my LED flat panel and a 2s exposure I end up with Red=91, Green=99 and Blue=165. Some crazy numbers for sure. But the histogram is much closer to balanced. This may end up being a complete fail but I'm going to test it out.

 

Normally with the 183C I'm running it at Red=127, Green=100 and Blue=127. So next time out under the stars I'll be ready with a set of flat and darks for both scenarios. If the 91-99-165 ends up a fail, I can switch over to the proven setting of 127-100-127.


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#86 BrentKnight

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Posted Today, 12:26 AM

Well...my flats (and especially darks) were a fail this evening on M82.  I let the exposure run very long because I kept trying different settings to fix things on the fly.  I started out with the offset way up there around 40, and it just smacked my flat.  It was the very first time I've seen amp glow with this camera.  I had time already invested so I didn't want to waste it, so I dropped the offset back down to 20 and I was doing 60 second subs.  Anyway, the H-alpha makes M82 into a completely different object.  This is a second try with this filter, so I'll be making some changes and trying again, but this is what I got...

 

M82 (H alpha) Screenshot 2022 05 29 001314
 
M82 123 frames 7380s WithDisplayStretch

Maybe the cropped original capture looks a little better.  Or the link to a larger version.


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