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EAA Monthly Observing Challenge - May 2023

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#1 BrentKnight

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Posted 30 April 2023 - 07:48 PM

Most of these are galaxies - befitting galaxy season.  I tried picking targets that have not been picked before and that were still interesting (not too small and showing something in reasonable time).  The list is rather long, but many of them are near each other so it seemed wrong to just include one on the list and exclude their nearby friends.

 

Galaxies
NGC4691, (NGC5364, NGC5363, NGC5360), NGC5348, (NGC5746, NGC5740), NGC5738, (NGC5846, NGC5850), NGC5945, (NGC5981, NGC5982, NGC5985), Seyfert's Sextet (Hickson 79)

 

Clusters
M5

 

Nebulae
vdB 99, IC 4592


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#2 BrentKnight

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Posted 30 April 2023 - 08:00 PM

Some additional notes:

 

NGC4691: Requires some integration time to bring out encircling spiral arms.
NGC5364, NGC5363, NGC5360: Perhaps line up on any star just north of NGC5364 to include all these galaxies in the same field.
NGC5348: Right on the edge of Abell 1809.  Nearby galaxies NGC5338 and NGC5356 may be in the same field.  Another galaxy with an MCG designation should be in the field and is an interesting face-on spiral.
NGC5740, NGC5746: If you can center your mount exactly between these two (NE of NGC5740), they should be in the same field of view.
NGC5838, NGC5846, NGC5850: NGC5846 and NGC5850 form a close pair.  A wide-field scope may get NGC5838 as well, but a standard f/6.3 SCT will need two shots to get them all.
M5: I could have picked a couple of these.  Give Omega Centauri a try if you have the southern horizon for it too.
NGC5945: This one was a last minute addition after I read a post about it in the DSO fora (NGC 5945: Barred "Ring" Spiral in Bootes).  It may be a little small, but it sure looks interesting.
NGC5981, NGC5982, NGC5985: The Draco Triplet (my species comes from one of these galaxies).  Not to be missed.
Seyfert's Sextet: Hickson 79
vdB 99: Dunno...wanted a nebula, and this one looked interesting.  Save this one and the next for later in the month.
IC 4592: Another unknown, but affectionately named The Blue Horsehead.

 

Overhead
Objects Overhead on May 15th
 
Data

Data from SkyTools 4 Professional


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#3 BrentKnight

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Posted 30 April 2023 - 08:36 PM

I'll start out with the Draco Triplet.

 

get.jpg?insecure

 

NGC5981, NGC5982, NGC5985

This one was captured about a week ago (before Luna made her appearance).  Captured with the Super C8 at f/6.3 with the Starizona SCT IV corrector.  The camera used was the ASI533MM-Pro with a ZWO UV/IR filter.

4s, 27.6m | G412, 0°, Background Subtraction=Linear Gradient Removal | Darks, Flats+Bias, Slight crop to remove alignment errors | SharpCap 4.1.10427.0 (beta)


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#4 Cey42

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Posted 30 April 2023 - 09:22 PM

Good collection of galaxies.Some were already on my list for May. I love the Draco Triplet.

 

Here is the SkySafari observing list

Attached File  CN May2023.skylist   4.82KB   58 downloads

 

vdB 99 is not is SS so I added DG 130 which is very close to it


Edited by Cey42, 30 April 2023 - 10:13 PM.

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#5 Tfer

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Posted 30 April 2023 - 09:31 PM

Good collection of galaxies.Some were already on my list for May. I love the Draco Triplet.

 

Here is the SkySafari observing list

attachicon.gifCN May2023.skylist

I was waiting for this!  Thanks Cey!


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#6 dob45

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Posted 01 May 2023 - 02:55 AM

M5:  18" f/4,2  dob self-made, ASI 178MM, Bortle 8 sky, 30% Moon , 35x2s

 

M 5.jpg


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#7 Tfer

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Posted 01 May 2023 - 03:16 AM

Grabbed NGC 5945.  When you stated that it was small, I was immediately interested.

 

It reminds me of NGC 7479, but with an extended arm.  Unfortunately, it’s almost directly overhead, which made for VISCOUS field rotation, so I could only go to 27’ of stacking. 
 

NGC 5945/294MC into reduced (0.7) C11/gain 300/8” subs/TI 27’ 

 

Flats, darks, unsharp mask (luminance channel) and Gaussian blur applied via SharpCap. 

 

2nd image cropped for the galaxy. 

Attached Thumbnails

  • 44ED45B6-6149-4FDF-8356-C91BF56CD720.jpeg
  • 400C24A6-CF66-457E-A0CA-765D04A0F5FA.jpeg

Edited by alphatripleplus, 10 May 2023 - 07:05 AM.

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#8 Tfer

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Posted 01 May 2023 - 03:24 AM

Messier 5.

 

Had some trouble that I need to track down with the color hue: seems a touch ‘purpley…’ Could be the moonlight refracting off of the smoke from some local grass fires that SharpCap is trying to compensate for. 

 

Messier 5/294MC into reduced (0.7) C11/gain 300/5” subs/TI 9’

 

Darks, flats, unsharp mask (luminance channel), Gaussian blur added via SharpCap.

Attached Thumbnails

  • BB96D658-CEBE-4EDE-B59F-A9C408A88481.jpeg

Edited by Tfer, 01 May 2023 - 07:51 AM.

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#9 bigbangbaby

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Posted 01 May 2023 - 07:15 AM

Thanks, Brent, Cey42! Clear skies forecasted here by week’s end.


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#10 alphatripleplus

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Posted 01 May 2023 - 07:39 AM

Nice selection, Brent. Lots of galaxies to choose from.


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#11 bmcclana

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Posted 01 May 2023 - 08:49 AM

Messier 5.

 

Had some trouble that I need to track down with the color hue: seems a touch ‘purpley…’ Could be the moonlight refracting off of the smoke from some local grass fires that SharpCap is trying to compensate for. 

 

Messier 5/294MC into reduced (0.7) C11/gain 300/5” subs/TI 9’

 

Darks, flats, unsharp mask (luminance channel), Gaussian blur added via SharpCap.

I saw something like this when i was using the color noise reduction in Sharpcap. where the background hue was skewed to one color, but the core of the globular was different.  even had that kind of hard changeover around the edges of the glob where the start density really started to increase. 


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#12 Larry Mc

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Posted 01 May 2023 - 04:41 PM

Some additional notes:

 

,,,,,,,,
M5: I could have picked a couple of these.  Give Omega Centauri a try if you have the southern horizon for it too.,,,,,,

Ahhhh, I knew I should have held-off a few more days before posting that observational report last week! LOL.

Rather than repost the images, here's a link to the thread:  https://www.cloudyni...2#entry12656538


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#13 BrentKnight

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Posted 01 May 2023 - 08:53 PM

I'll likely try to redo a couple of these, but I pre-observed many of them to see if they were suitable targets.  I was pretty happy with this capture taken with the Super C8 + Starizona and the ASI533MM-Pro with UV/IR.

 

get.jpg?insecure

 

Seyfert's Sextet: NGC6027A, B, C, D and E

15s, 60m | G300, Bin 1, 0°, Background Subtraction=Off | Darks, Flats+Bias, Cropped and annotated | SharpCap 4.1.10427.0 (beta)

 

My notes from the session:

Very cool, but tiny, (right) triangular shaped galaxy group.   These are all elliptical or S0 type and so are fairly bright and generally uniform.  One of the galaxies (NGC6027B) has a faint extension below it that was originally thought to be the 6th member of the group (NGC6027E), but that is now know to be an extension of the brighter galaxy (type Scd).  I think this shows pretty clearly in my capture.  NGC6027C is also classed as an Sdm type and so it shows a bit of a brighter core with an elongated extended halo.  The extension off N6027B is strange as it does not appear to be connected to the main galaxy at the 18 minute mark.  It's just a fairly uniform bright patch with a darker inner section right where it meets the main galaxy.  Tiny, round and faint NGC6027D is right near N6027B and at right angles to it's faint extension.  At about 30m, NGC6027A (the brightest member of the group), begins to show a faint halo around its mostly uniform bright oval core (2:1).  I've seen sharper captures (Hubble) where there is a fine, dark lane crossing this halo, but I see no hint in my capture.  NGC6027D starts to show a little internal structure at 36m and at 175% zoom.  In the same capture that shows the dark lane in N6027B I see that N6027D is a clumpy, face-on spiral and this variation in brightness that I'm seeing is the brighter sections in those arms.  At the 40m mark, it's clear that N6027E does connect and actually wrap around N6027B.  In fact, it's apparent that there is material between all the member galaxies toward the center of this group.


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#14 bigbangbaby

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Posted 05 May 2023 - 03:08 PM

A 97% waxing moon and high humidity made imaging May Challenge objects, well, challenging. 

 

 

HCG97: Comet Hunter; 510s, 300 gain, 0 deg C, ASI294MC Pro

hcg79_510s_300_ch_05042023.JPG

 

M5: Comet Hunter; 310s, 300 gain, 0 deg C, ASI294MC Pro

m5_310s_300_ch_05042023.JPG

 

Another clear night in the forecast, but I may wait a few days for the moon to recede. Combined with the humid air, moonlight washed out the sky.

 

 

 

 

 


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#15 Jonathan Shields

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Posted 05 May 2023 - 04:22 PM

Thanks for the challenge.  Cloudy weather here and full moon but managed M5 before the clouds rolled in.  78 frames@ 4 seconds gain 350.  Nice cluster quite low and near the horizon glow and moon but not a bad view.  Dark frame used.

 

 

Attached Thumbnails

  • M5Cropped.jpg

Edited by Jonathan Shields, 05 May 2023 - 04:23 PM.

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#16 BrentKnight

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Posted 05 May 2023 - 04:47 PM

I made this capture of Messier 5 back on 4/23/2023 - again in preparation for the May Challenge.

 

M5 (183 Subs, 2745s) (UV IR)   00 12 39 WithDisplayStretch
Messier 5
Celestron C8 @ f/6.3 with Starizona SCT IV and ASI533MM-Pro with UV/IR
183 - 15s subs for 45.75m | Darks, Flats+Bias, WD, slight crop to remove registration | SharpCap 4.1

 

Same capture but with some contrast and level tweaks in ACDSee is here on AstroBin for comparison.


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#17 steveincolo

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Posted 06 May 2023 - 10:08 AM

I hadn't had a good chance for EAA in the last several weeks, so I decided have a session last night despite the full moon that was within 30 degrees or so of some of Brent's galaxies.  I was eager to try the 462MM with the AT130 (0.8x FF/FR); ASTAP platesolving was fine.  Not really a fair test of this setup with the moon, but I'll inflict these suboptimal views on you all anyway.  

 

AT130EDT at 728mm; ASI462MM at 200 gain; CEM 70.  Stacked in Jocular.

 

NGC 4691.  11 x 30 sec. The bright core reminds me a bit of M82, it was a little work to see the outer loops without blowing out the core completely.

NGC 4691 05May23 22 01 50
 
Inverted view.
NGC 4691 05May23 22 02 41
 
NGC 5364. 9 x 30 sec.  Should be able to recover more detail in this spiral in better conditions.
NGC 5364 05May23 22 12 41
 
I started with 30 second subs then switched to 15 second, analogizing the moon to severe light pollution. 20 x 15 sec.  Seems to have improved the view.
NGC 5364 05May23 22 21 31
 
NGC 5348 and NGC 5338.  20 x 15 sec.  
NGC 5348 05May23 22 34 17
 
NGC 5738 and NGC 5740.  20 x 15 sec.  I'd like to take another look at NGC 5740, just starting to get a little detail there.
NGC 5738 05May23 22 46 17
 
NGC 5945, 20 x 15 sec.  I checked Aladin Lite to make sure none of those stars was a supernova!  It showed me that this one is worth revisiting, too.
NGC 5945 05May23 22 58 08
 
Seyfert's Sextet.  40 x 15 sec.  Being able to just identify all six members in these conditions might be the limit, but I'd hope to be able to catch a little of the spiral in NGC 6027D and the dust lane in NGC 6027A.  This is a very zoomed view!  
NGC 6027 05May23 23 18 52

 

 

 

 

 

 


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#18 BrentKnight

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Posted 06 May 2023 - 05:42 PM

Great captures. I can't hardly wait to play with a 130 now...

I think that dust lane is going to be a real challenge, but I'd love to see someone get it.
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#19 Tfer

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Posted 06 May 2023 - 06:03 PM

Great captures. I can't hardly wait to play with a 130 now...

I think that dust lane is going to be a real challenge, but I'd love to see someone get it.

That’s the kind of challenge I love!


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#20 roelb

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Posted 07 May 2023 - 05:24 PM

Evo 8 @ F/5.3

ASI533MM-Pro

Moon: 91.4 %

SharpCap 4.1 ß ; Linear Gradient Removal

 

NGC 5348_ZWO ASI533MM Pro_15 x 15,0s = 225s_3_05_2023T00_10_30_WithAnnotations.jpg

 

40 x 15 s

NGC 5348_ZWO ASI533MM Pro_40 x 15,0s = 600s_3_05_2023T00_10_30.jpg

NGC 5348_ZWO ASI533MM Pro_40 x 15,0s = 600s_3_05_2023T00_10_30_CROP.jpg


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#21 roelb

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Posted 07 May 2023 - 05:27 PM

Evo 8 @ F/5.3

ASI533MM-Pro

Moon: 91.4 %

SharpCap 4.1 ß ; Linear Gradient Removal

 

NGC 5360 + 64_ZWO ASI533MM Pro_13 x 15,0s = 195s_3_05_2023T00_58_11_WithAnnotations.jpg

 

20 x 15 s

NGC 5360 + 64_ZWO ASI533MM Pro_20 x 15,0s = 300s_3_05_2023T00_58_11.jpg


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#22 roelb

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Posted 07 May 2023 - 05:28 PM

Evo 8 @ F/5.3

ASI533MM-Pro

Moon: 91.4 %

SharpCap 4.1 ß ; Linear Gradient Removal

 

NGC 5363_ZWO ASI533MM Pro_9 x 15,0s = 135s_3_05_2023T00_24_47_WithAnnotations.jpg

 

25 x 15 s

NGC 5363_ZWO ASI533MM Pro_25 x 15,0s = 375s_3_05_2023T00_24_47.jpg


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#23 roelb

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Posted 07 May 2023 - 05:31 PM

Evo 8 @ F/5.3

ASI533MM-Pro

Moon: 91.4 %

SharpCap 4.1 ß ; Linear Gradient Removal

 

NGC 5364_ZWO ASI533MM Pro_31 x 15,0s = 465s_3_05_2023T00_34_31_WithAnnotations.jpg

 

72 nx 15 s

NGC 5364_ZWO ASI533MM Pro_72 x 15,0s = 1080s_3_05_2023T00_34_31.jpg

 

 

15 x15 s

NGC 5738 + NGC 5740_ZWO ASI533MM Pro_15 x 15,0s = 225s_3_05_2023T01_32_36_WithAnnotations.jpg


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#24 roelb

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Posted 07 May 2023 - 05:33 PM

Evo 8 @ F/5.3

ASI533MM-Pro

Moon: 91.4 %

SharpCap 4.1 ß ; Linear Gradient Removal

 

NGC 5740_ZWO ASI533MM Pro_20 x 15,0s = 300s_3_05_2023T01_13_41_WithAnnotations.jpg

 

55 x 15 s

NGC 5740_ZWO ASI533MM Pro_55 x 15,0s = 825s_3_05_2023T01_13_41_CROP.jpg

 

 

NGC 5746_ZWO ASI533MM Pro_9 x 15,0s = 135s_3_05_2023T01_05_51_WithAnnotations.jpg

 

23 x 15 s

NGC 5746_ZWO ASI533MM Pro_23 x 15,0s = 345s_3_05_2023T01_05_51.jpg


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#25 roelb

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Posted 07 May 2023 - 05:34 PM

Evo 8 @ F/5.3

ASI533MM-Pro

Moon: 91.4 %

SharpCap 4.1 ß ; Linear Gradient Removal

 

NGC 5945_ZWO ASI533MM Pro_19 x 15,0s = 285s_2_05_2023T23_52_36_WithAnnotations.jpg

 

55 x 15 s

NGC 5945_ZWO ASI533MM Pro_55 x 15,0s = 825s_2_05_2023T23_52_36_CROP.jpg


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