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EAA Monthly Observing Challenge - August 2021

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#1 Stargazer3236

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Posted 01 August 2021 - 06:56 AM

Greetings fellow Stargazer's...catchy name, isn't it?

 

My monthly foray for this month will include some very delightful cosmic gems in the form of Planetary nebula (PNe), my favorite type of object to observe and EAA observe! When I started out years ago, back in the middle 80's, I got my first real big telescope, an Odyssey 13.1. I really liked that scope and I made my first attempt to hunt down the Abell planetaries with it. I observed visually about 32 of the 84 PNe using just eyepieces and a UHC/OIII filter.  While I was doing that, I discovered my favorite planetary nebula, Abell 12, right next to Mu Orionis. My second favorite is Abell 39, a nearly perfectly round PNe. Since then, my one goal in life is to get a nice EAA pic of Abell 39, but it is a tough nut to crack and finding it is quite a chore.

 

All pictures posted were taken by me and my equipment.

 

So, on to this month's Challenge:

 

I will divide this into 3 categories: Easy, moderate and tough. You need not get them all, but kudos if you do. I would recommend at least a 10 inch scope for the last set of tough PNe. You can see the Easy ones and most of the Moderate ones with anything from 60mm to 200mm, however some will require the good ole standby 8" (Celestron and Meade users rejoice!).

 

In the Easy section we have:

 

Messier 57, also known as NGC 6720. this beautiful ring shaped PNe is aptly named the Ring Nebula, located in Lyra. It has a nice semi-round appearance, about mag 8.8 and it appears 1.4' x 1.1' in diameter. Easily recognizable as not a star when looked at in the field of view. Upon closer observation, there is a central star, mage 15.1 nearly in the center of the Ring itself. Adjacent to that is another star slightly dimmer at 16.3m and one more star in the Ring periphery is a 15.7 mag star. Most long exposure EAA images will pic out these two other stars. If you get a nice image of the  Ring, on one side of the nebula is the galaxy IC1296, a 15.34 mag object that can be seen in your EAA image, if you have the right amount of aperture.

M57.jpg

 

Next up, we have the ever popular Messier 27, NGC 6853, better know as the Dumbell nebula, located in Vulpecula, the Fox. It is a dim constellation East of Cygnus the Swan. To me, it looks like an apple core, one of its other names. This is a huge PNe, almost 8x the size of the Ring nebula. It is mag 7.09 and 8.0' x 5.7' in diameter. When you put the Dumbell in your FOV, it takes up the whole FOV, it's that big! I would recommend at least a UHC filter because of its size, its surface brightness is spread out and can be hard to see if the sky background is too bright.

m27 77x8s 20 zoom 1x1bin 350gain_apple_core_nebula.jpg

 

Next, in the Bowl of the Big dipper, we have Messier 97, NGC 3587, known as the Owl nebula. It stands out at mag 9.8 and a size of 3.4' x 3.3', about double the size of M57. It has distinctive voids in the middle of the nebula that resemble Owl eyes, hence the name. This PNe appears very nicely with an OIII filter. Longer imaged EAA pics of it show a light red ring of Ha nebulosity at its periphery. A triangle of 3 stars near one of the eyes, lets you know you have found it. Find it just below and East of Merak outside the bottom of the Bowl. Nearby is the Surfboard galaxy, M108. Wider FOV can grab both the Owl and Surfboard together for a nice pairing!

m97-1x1bin-570gain-33p-zoom-40x15s-1.jpg

 

To wrap up the Easy column, we have Messier 76, NGC 650/651, also know as the Little Dumbell nebula Located in Perseus. To me, it looks like a double handled beer stein, with handles on either side. This nice and colorful nebula is mag 10.10 and is 2.7' x 1.8' in diameter. Visually, it looks like a thick bar of nebulosity, but in an EAA image, the handles start to come out and using an OIII filter helps shown them better.

m76-2x2bin-400gain-40x15s_orig.jpg

 

Now for the Moderates. These are a bit of a challenge, but fairly easy to find if you have Goto.

 

First off we have NGC 6826 in Cygnus. It shines at mag 8.9 and is 2.1' in diameter. Visually, upon inspection, with no filter you can see the star directly and faint nebulosity, using averted vision, the nebulosity pops out, giving this its moniker, the Blinking Planetary. Located in the western section of the bird constellation, it is located near Psi and d Cygni, just outside the FOV of 16 Cygni. This is a nice green tinted PNe. In an OIII filter, it is very round with a central, tilted ring, much like looking at Saturn in the nebula. In EAA images, there is an inner shell, the aforementioned Saturn like ring, followed by a slightly fainter shell and finally a very faint, diaphanous outer ring only seen in very long exposures.  The central star is easy to see, shining at mag 10.6.

ngc6826.jpg

 

Next, we have NGC 7009, the Saturn nebula. Located in Aquarius, near Psi Aquarius. It's basically in no man's land of the sky with no discernible landmarks. At mag  7.8 and 30" x 24", Small, but it is fairly bright, but it shines best with an OIII filter. Larger scopes can pic out fine detail in the center. At first glance, it looks like an ordinary round PNe, but upon closer inspection and moderate EAA imaging, two rays or Ansae appear on either side of the nebula, giving rise to its name, the Saturn nebula. These rays are quite faint and will either appear with a long EAA exposure or a very large telescope, 10"+.

NGC 7009 Saturn Neb_.jpg

 

Next is NGC 6302, the Bug nebula in Scorpius. This is a cool looking nebula, looking like a Rhinoceros Beetle. It shines mostly in Ha, but OIII can find just it as well. Listed at 9.89 mag and 1.4' x 0.4'. it is roughly the size of M57, but of an unusual shape. You must have a clear horizon to see it, it resides in the basement of Scorpius, about halfway between Shaula/Lesath in the tail and Mu 1 and Mu 2 in the torso of the Scorpion. From my location near Boston, MA it nearly hugs the horizon, maybe 6-7 degrees above it, in the thickest part of the atmosphere. But finding it and EAA observing it is quite a treat!

NGC_6302_Stack_45frames_360s_WithDisplayStretch.jpg

 

 

Lastly, in the Moderate column, we have NGC 6818, the Little Gem in Sagittarius. Also located in the no mans land of Sagittarius, it is also near Barnard's galaxy. This planetary nebula is quite small, at mag 9.39 and 0.4' x 0.2' in diameter. But because of its compactness, it is quite bright and easy to find using an OIII filter. It really pops out from the background stars in EAA. The central detail is quite mottled, appearing like a jumbled mess inside the nebula itself. The central star appears as a tiny blue dot.

ngc6818-1x1b-400g-23x2s-color.jpg

 

Now for the Tough stuff. Gird your loins, we take a gander at some less well known planetary nebula that I have enjoyed finding and EAA imaging.

 

First up is the Tiny Ring nebula in Lyra, known as Minkowski 1-64. it is located not too far away from M57, in the western middle of the Box of the Lyre. This PNe is mag 12.89 and about 0.3 arc minutes in diameter. Once you spot it, it appears like a tiny version of the Ring nebula. It is nearly touching a nearby star, so you can't miss it. Using Goto is almost a must to find it. I have EAA imaged it and found it has some similar color to the Ring nebula.

M1-64.jpg

 

Next up is the Full Moon nebula, NGC 6781. This nebula resides in Aquila, at mag 11.6 and an almost perfect round size of 1.9' x 1.8'. You can find it just 2.5 degrees north of the star 22 Aquila.This nebula shines in Ha light, but the central portion glows in OIII. EAA imaging shows both a red and green color to the structure. A nice addition to any PNe collection.

ngc6781 1x1bin 50 pcnt zoom 350gain 76x15s 15min_crop.jpg

 

Next we have NGC 7008, better known as the Fetus nebula. To me, it looks like someone's ear. But long EAA exposures will show what looks like a Fetus inside a womb. This nebula is mag 11.0 and appears 1.6' x 1.2 in diameter. This PNe glows mostly in OIII. A long EAA exposure will show some nice detail and what looks like puffiness in the contour of the nebula's shape. This nebula is located north of the more famous North American nebula, but in a less populated part of the eastern portion of the constellation of Cygnus.

ngc7008 1x1bin 350gain 50 pcnt zoom 94x8s full frame_crop.jpg

 

Lastly we have NGC 6894, what I like to call the Donut nebula. It literally looks like a cosmic donut. In color, it appears brownish. Located in Cygnus, near the border with Vulpecula, near the stars 41 and 39 Cygnus. This PNe is mag 12.5 and 0.7 in diameter. It is fairly small, but shows up nicely in EAA exposures. It has a noticeable, but fainter central star and touches a nearby star near one side.

ngc6894 1x1bin 350gain 30x12s 66 pcnt zoom full frame_crop_.jpg

 

So now for some real challenges. These are for the diehards only and trust me, will test your patience.

 

In no particular order: Abell 39, known as the most perfect circular PNe in the sky. It has a diaphanous middle and a well pronounced ring of nebulosity. But don't be fooled, this is one tough PNe to track down. Located in Hercules, it shines at mag 12.89, but at 2.8' in diameter, it surface brightness glows at about mag 15.5. It is rather faint and tough to EAA image. I have tried in vain to see this in EAA and might have a pic somewhere of my nearly wasted effort.

Abell 39.jpg

 

Minkowski 4-17, located in Cygnus. This one appears nearly identical to M57, albeit at a smaller and fainter size. Listed at mag 14.6 and only 0.4 x 0.3 in diameter. This looks like a miniature version of M57. It shows some color as well. It is flanked by two stars, one on either side of its ring. This is located just west of the star Sadr in Cygnus.

m4-17 350gain 2x2bin 42x15s 100pzoom.jpg

 

I hope you enjoy my monthly challenge. I have tried out all the other challenges and many were tough to finish. I hope my list makes a good impression.

 

P.S. I recently bought my last and biggest telescope, the Orion XX14g Goto Dobsonian  and it arrived on Wednesday. I used it to EAA image M57, NGC 6826 and Minkowski 1-64.


Edited by Stargazer3236, 01 August 2021 - 07:07 AM.

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#2 alphatripleplus

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Posted 01 August 2021 - 07:07 AM

Nice selection to keep everyone busy this month.smile.gif


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#3 GazingOli

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Posted 01 August 2021 - 12:35 PM

Planetaries are my favourites! Great choice. Hope to get good weather to catch them all.

 

CS.Oli


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#4 Cey42

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Posted 01 August 2021 - 03:30 PM

I love the color and different shapes of planetaries. M57 was the first object I looked at with EAA and it got me hooked. You have a couple that I have not seen yet. In particular, I want to try for NGC6302, but here in Seattle it only gets up to 5 degrees. Not sure if the trees will be in the way or not.

 

 

Here is the SkySafari observing list.

Attached File  CN Aug21.skylist   3.3KB   15 downloads

 

 

For those you that use Stellarium to slew to your objects

M1-64 is PK 064+15.1

M6-17 is PK 079+05.1

 

 

 

 

 


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#5 Mark Lovik

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Posted 01 August 2021 - 08:06 PM

Nice contrast to objects in the last few months.  I just imaged half the objects in the last week or so to test out a new mount.  Planetaries can work better with the moon.

 

Mine will only be mono ... may have a chance to use the SCT to bump up the scale



#6 Tfer

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Posted 01 August 2021 - 09:09 PM

I really appreciate the varying targets. 
 

It’s nice to look beyond the Messier and NGC catalogs. 



#7 alphatripleplus

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Posted 01 August 2021 - 11:48 PM

I  took a stab at one of the easy and hard targets this evening. Set-up was an AT72EDII APO reduced to f/4.4 (318mm focal length), ASI290MM mini, 300 gain, no binning , a Lumicon Deep Sky Filter and SharpCap Pro 4.0:

 

First up is a quick 2 minute live stack of the Dumbbell Nebula.

 

M27; 8 x 15s

 

M27_DS_f4.4_Stack_8frames_120s_RS_2021-08-01T23_12_55.jpg

 

 

 

 

 


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#8 alphatripleplus

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Posted 01 August 2021 - 11:56 PM

Next with the same set-up is a 10 minute live stack of the very, very faintly visible Abell 39 at the centre of the frame. (North is up in both images). As this one is so faint, I had to really stretch the view to show the outline against the sky background.

 

Clicking on the images gives a zoomed view.

 

Abell 39 (PK 47+42.1); 40 x 15s

 

 

Abell 39_DS_f4.4_Stack_40frames_600s_RS_2021-08-01T22_51_07.jpg


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#9 Stargazer3236

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Posted 02 August 2021 - 08:15 AM

Nicely done Errol! I am amazed you could EAA Image that with your 72mm! Bravo!


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#10 GaryShaw

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Posted 02 August 2021 - 10:02 AM

Next with the same set-up is a 10 minute live stack of the very, very faintly visible Abell 39 at the centre of the frame. (North is up in both images). As this one is so faint, I had to really stretch the view to show the outline against the sky background.

 

Clicking on the images gives a zoomed view.

 

Abell 39 (PK 47+42.1); 40 x 15s

 

 

attachicon.gifAbell 39_DS_f4.4_Stack_40frames_600s_RS_2021-08-01T22_51_07.jpg

Nice Work Errol. I'm looking forward to your views of M97, 6302 and 6812. They're too low or otherwise blocked from my location.
 


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#11 YossiZ

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Posted 03 August 2021 - 02:45 AM

I had the chance to catch some of the easier targets last night, M57 and C15 (NGC 6826, I wonder why the Caldwell designations are barely used...). I will try to take more later on.

 

M57, 16x30s binning 1, high gain:

 

Light_Stack_16frames_ASILive_30sec_Bin1_31.2C_gain270_2021-08-03_003644.jpg

 

 

C15, 16x10s binning 1, low gain:

 

Light_Stack_16frames_ASILive_10sec_Bin1_31.3C_gain0_2021-08-03_005046.jpg


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#12 Tiago Ferreira

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Posted 03 August 2021 - 06:40 AM

Here we go

 

Minkowski 1-64 (PK 064+15.1) in Lyra

 

56x3s

 

12" f5 Dobsonian on Eq Platform

 

ZWO ASI294MC

 

Minkowski 1-64 (PK 064) in Lyra Stack_56frames_166s.jpg

 

Ring nebula in Lyra

 

26x5s

 

Ring in Lyra Stack_26frames_130s.jpg

 

Dumbbell nebula in Vulpecula

 

36x5s

 

cc.jpg


Edited by Tiago Ferreira, 03 August 2021 - 06:46 AM.

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#13 bmcclana

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Posted 03 August 2021 - 10:32 AM

Got a good start to August!

 

changed my setup again and removed the starsweeper reducer to get some added focal length to help with this months tiny targets (Solved focal length of 892 for right around f/7).  cleaned up my collimation under the stars, not perfect, but much improved. 

 

C5, 0.63R/C, Mars-C, camera, no filters, no flats or darks. 

 

I hit two of the targets in the south while waiting for a shot at Saturn and Jupiter.

 

Little Gem NGC6818.  38x8s Gain 100  saved as seen and cropped. Nice bright green, shape and texture makes me think of an emerald

 

Little Gem_ 38frames_304s_DS_Crop.jpg

 

 

NGC6781 68x8s, Gain 100  saved as seen and cropped.  This one is definitely dim, but was able to find it and even get a hint of a red rim.  I will probably revisit this one with a filter at some point. 

 

NGC6781_68frames_544s_crop.jpg


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#14 GazingOli

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Posted 03 August 2021 - 08:07 PM

I am in Spain right now and we are setting up a remote telescope for a friend of mine. So I could only bring a small rigg and scope. Not really made for small PNs...

 

scope 80/480 triplet apo custom made "Olifraktor"

mount Skywatcher AZ-Gti

camera ZWO ASI 294 MC uncooled

filter Baader UV/IR cut filter

darks and flats applied but not really well done

location Castillejar, Spain

 

M27 20 frames x 8 s gain 300 crop

M27 Olif6ASI294UVIR_20frames_160s_crop.jpg

 

M97 29 frames x 8 s gain 400 crop

M97 Olif6ASI294UVIR_29frames_232s_crop.jpg

 

Most of the rest I did in July already (see my gallery - link in my signature), we will see if I get the chance to do them again.

 

CS.Oli


Edited by GazingOli, 03 August 2021 - 08:08 PM.

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#15 drprs8181

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Posted 04 August 2021 - 04:32 PM

Only had about an hour last night, but wanted to test how the 294MC would work on the Z130 OTA.  I think the weight is a bit much for the plastic focuser.

 

Equipment:

  • Z130 OTA
  • ZWO ASI294MC
  • AZ-GTe Mount with SkyWatcher Wedge in EQ Mode
  • UHC filter where noted

Details:

  • Images live stacked in Sharpcap, darks applied, histogram adjusted then "Save as seen"
  • Bortle 6

 

M57 - 22x15s | Gain 250 - Slight crop for framing
M57 Crop
 
M57 - 3x Barlow - 9 x 30s | Gain 350
M57 3x Barlow
 
M27 - 19x15s | Gain 350
M27 Crop Z130
 
 

 


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#16 YossiZ

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Posted 05 August 2021 - 12:00 AM

Two more from last night, 26°C outside but good conditions otherwise. The relative success with the Little Gem encourages me to try some more moderate targets in the next sessions.

 

M27, 21x30s, high gain:

Light_Stack_21frames_ASILive_30sec_Bin1_33.8C_gain270_2021-08-05_011702.jpg

 

NGC6818, 11x10s, low gain:

Light_Stack_11frames_ASILive_10sec_Bin1_33.8C_gain0_2021-08-05_003723.jpg

 

Cropped:

20210805_074057.jpg


Edited by YossiZ, 05 August 2021 - 12:03 AM.

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#17 GazingOli

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Posted 05 August 2021 - 01:58 AM

as I said above, my setup is not ideal for small objects

 

Olifraktor20210804_204151k.jpg

 

just my selfmade 80/480 triplet apo with ASI 294 MC and Baader UV/IR cut filter on an AZ-Gti

but I did my best to capture some more of the PNs from this month's challenge from Castillejar in Spain, all captured with gain 400

 

tiny little M 57: 15 frames x 8 s resized plus 1:1 crop

M57 Olif6ASI294UVIR_15frames_120s_resized+crop.jpg

 

M 76: 34 frames x 8 s resized + 1:1 crop

M76 Olif6ASI294UVIR_34frames_272s_resized+crop.jpg

 

M 97: 53 frames x 8 s resized + 1:1 crop

M97 Olif6ASI294UVIR_53frames_424s_resized+crop.jpg

 

...


Edited by GazingOli, 05 August 2021 - 07:16 AM.

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#18 GazingOli

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Posted 05 August 2021 - 02:08 AM

NGC 6781: 35 frames x 8 s resized plus 1:1 crop

NGC6781 Olif6ASI294UVIR_35frames_280s_resized+crop.jpg

 

NGC 7008: 13 frames x 8 s resized plus 1:1 crop

NGC7008 Olif6ASI294UVIR_13frames_104s_resized+crop.jpg

 

CS.Oli


Edited by GazingOli, 05 August 2021 - 07:15 AM.

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#19 Mikehuerto

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Posted 05 August 2021 - 07:12 AM

A great selection of PNes, many of which were first time targets for me. All were imaged with an ASI224MC on a 14¨ Dobson, which gives me a nice tight FOV. M27 barely fit!  

The remote GOTO set up behaved nicely to cruise around the sky.

 

My favorite is the Blinking Planetary (NGC 6826) and the Fetus Nebula (NGC 7008) - I could just about make out the fetus, but couldn´t determine the ****!

 

I´ll be back tonight to get M97, NGC 7009 and Abel 39 all  too low by the time I got to them. 

 

The  bug nebula is hidden behind the hill to my south- blocks 30 deg and lower frown.gif . Cant see myself lugging the Dob up the hill!

 

All shot early hours of August 5th, Valencia, Spain

 

Filter- Omegon City Lights LP

1 sec

300 gain

flats x 25

dark x 25

pre-processed in Sharpcap

resized, cropped and labeled with Windows Edit - 

Frames:

M57 x 89

M27 x 304

M76 x 365

NGC 6826 x 225

NGC 6818 x 41

Min 1-64 x 17

NGC 6781 x 152 

NGC 7008 x 301

NGC 6894 x 158

Attached Thumbnails

  • M57Stack_89frames_89s_WithDisplayStretch.jpg
  • M27Stack_304frames_304s_WithDisplayStretch.jpg
  • M76Stack_365frames_365s_WithDisplayStretch.jpg
  • NGC6826 Stack_225frames_225s_WithDisplayStretch.jpg
  • NGC 6818 Stack_41frames_41s_WithDisplayStretch.jpg
  • M1-64Stack_118frames_118s_WithDisplayStretch.jpg
  • NGC6781 Stack_152frames_152s.jpg
  • NGC 7008 Stack_301frames_301s_WithDisplayStretch.jpg
  • NGC 6894 Stack_158frames_158s.jpg

Edited by Mikehuerto, 05 August 2021 - 09:34 AM.

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#20 Bob_Stan

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Posted 05 August 2021 - 11:36 AM

NGC 7008 Fetus Nebula

C11 f/10 Paramount MyT mount

ASI294Pro 10x30secs bin 2x2

Images reduced in size for posting

 

C11_NGC 7008_10x30.000secs_2x2_-10.00C_modified2.png


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#21 Bob_Stan

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Posted 05 August 2021 - 11:45 AM

NGC 6894
C11 f/10 Paramount MyT mount
ASI294Pro 10x30secs bin 2x2
Images reduced in size for posting

 

C11_NGC 6894_10x30.000secs_2x2_0.00C_modified2.png


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#22 Cey42

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Posted 05 August 2021 - 10:50 PM

Great selection of planetary nebulae. I just love the colors. Some real challenges.

 

 

Equipment

  • Celestron 8” SCT on Celestron Advanced VX mount
  • Celestron F6.3 focal reducer
  • Darks/Flats applied
  • Offset 10, binning of 1 for all images
  • Bortle 7 (red zone).  Seeing OK.
  • Live Stacked.  Screen Saved (Cropped and Resized)
  • ZWO ASI294MC w/ Optolong LPro filter

 

 

M57
38x12s. 300 gain
This was the first EAA object that I saw 11 months ago and it got me hooked. I still love it.

M57-8_4_2021-38x12s.jpg

 

M27
3x12s. 300 gain

M27-8_4_2021-33x12s.jpg

 

NGC6826
25x12s. 300 gain
This was a challenge to get the interior structure. I really had to play with the histogram.

NGC6826-8_4_2021-27x12s.jpg

 

NGC7008
30x12s. 300 gain

NGC7008-8_4_2021-30x12s.jpg

 

NGC 6894
25x12s. 300 gain
Could barely make this out

NGC6894-8_4_2021-25x12s.jpg

 

 

 

NGC6781
33x12s. 300 gain

NGC6781-8_4_2021-33x12s.jpg

 

 

M1-64 (ARO82)
25x12s. 300 gain
This was tough given how small it is.

ARO82-8_4_2021-25x12s.jpg

 

M4-17 (ARO346)
26x12s. 300 gain
When first saw this , I thought I had made a mistake given how close it resembles M1-64

ARO346-8_4_2021-26x12s.jpg

 

NGC6818
28x12s. 300 gain
I could not get the details in the center. It simply was too bright.

NGC6818-8_4_2021-28x12s.jpg

 

NGC7009
26x12s. 200 gain
I dropped the gain to 200 in order to try and not have the nebula blown out but to no avail. I was happy to be able to see the “wings.”

NGC7009-8_4_2021-26x12s.jpg

 


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#23 GazingOli

GazingOli

    Viking 1

  • -----
  • Posts: 668
  • Joined: 13 Oct 2019
  • Loc: Stuttgart GERMANY

Posted 08 August 2021 - 01:32 AM

two more from me from last night:

 

scope CPC800 on wedge

camera ZWO ASI 294 MC non cooled

filter Explore Scientific broadband UHC

location Stuttgart, Germany

 

NGC 6818 - 31 x 16 s 100 % crop

NGC6818 C8f10ASI294UHC_31frames_496s_crop.jpg

 

 

NGC 7009 -13 x 16 s 100 % crop

NGC7009 C8f10ASI294UHC_13frames_208s_crop.jpg

 

CS.Oli


Edited by GazingOli, 08 August 2021 - 01:36 AM.

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#24 PeterAB

PeterAB

    Explorer 1

  • *****
  • Posts: 98
  • Joined: 20 Nov 2019
  • Loc: Southern Wisconsin, USA

Posted 08 August 2021 - 05:43 PM

There has been lots of wildfire smoke in south central Wisconsin.       I got a little break the night of the 6'th with just moderate smoke (30mg/m2 vertically integrated).   

 

Got a view of the ring nebula.    8" Meade 2080 SCT reduced to f4.9 (too much).   On a wedge with tracking without goto.   ZWO ASI294mc bin 1 2112x2116 pixel view.    Gain 130.   668 second exposure (4x168).    Inage saved as viewed in SharpCap.     I had a good live view after two minutes.    I ran the exposure longer to try to pick up a little more detail in the core.    It may have help.

 

Normally I can see the ring nebula visually as a greenish ring.    With the smoke, it appeared as a small gray blur.   Much nicer view with the help of my camera. 

 

Ring Nebula (m57) Stack 167frames 668s
 
Peter

Edited by PeterAB, 08 August 2021 - 11:20 PM.

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#25 PeterAB

PeterAB

    Explorer 1

  • *****
  • Posts: 98
  • Joined: 20 Nov 2019
  • Loc: Southern Wisconsin, USA

Posted 10 August 2021 - 03:32 PM

There was a little less wildfire smoke last night than there has been at my house (20mg/m2 vertically integrated).   Still, the smoke drops my visual limiting magnitude by one.

 

I got a look a look at M27.    Visually, it is a good sized gray patch.        

 

I used the same setup as above.   720 second exposure (90x8seconds).    Bin 2.   Cropped the saved as viewed image.

 

M27-dumbell nebula Stack 90frames 720s.png
 
Peter

Edited by PeterAB, 10 August 2021 - 03:37 PM.

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