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End of gas giant season for me, how was it for you?

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#1 kevinbreen

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Posted 13 September 2019 - 11:54 AM

Jupiter is now a distant memory and the weather isn't favouring good Saturn captures at all lately (despite clear skies). Here are the results from the last two nights

 

2019-09-11-2004_0-KB-L_lapl6_ap11_23.jpg 2019-09-12-2006_4-KB-L_lapl6_ap11.jpg

 

Jet stream was roaring away overhead.

 

I had my best season so far out of three this year though - I caught a total lunar eclipse in January, some good lunar shots in March, an excellent (for me) Saturn in July and a few decent Jupiters (although not as good as last year's).

 

How was (is) it for you?

 

 


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#2 RedLionNJ

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Posted 13 September 2019 - 12:05 PM

Definitely my worst season since I started taking this seriously (2012).

 

Nary a good Jupiter and only a couple good Saturns (so far). Neither is invisible to me, yet, though.

 

 

Roll on Mars.


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#3 descott12

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Posted 13 September 2019 - 12:29 PM

Thanks to Celestron, my Evolution mount has been out of commission for much of the last 3 months. On it's way back to California for the THIRD time.

But I did get in a few good nights and captured Neptune for the first time.

I finally got a ZWO ADC but haven't had a chance to try it yet.



#4 fcathell

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Posted 13 September 2019 - 12:32 PM

Not really a good year for Jupiter and Saturn due to their location in the southern sky where the ecliptic is so low. I'm not so sure next year will be much better because of their slow movement.

 

Frank



#5 AstroEthan

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Posted 13 September 2019 - 12:45 PM

I consider it a pretty impactful year. Wind held us back from using the CGEM DX/C14 on most nights this summer, but I was still able to use the AVX/C8 on those nights. Now I'm back to imaging from my university with the C8 on weeknights and the C14 at home on weekends.


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#6 Richard O'Neill

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Posted 13 September 2019 - 12:56 PM

How was it for me? OK I guess but I did feed more than a few skeeters. Observing Jupiter will be more to my liking in a few years when it peaks during Autumn weather.


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#7 Tulloch

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Posted 13 September 2019 - 05:42 PM

Brilliant! Ihavenojoints.gif  snoopy2.gif  yay.gif
My first 6 months of imaging the planets, and I still can't believe the images I was able to get out of a 2nd hand 6" SCT off eBay and my old DSLR! Of course it helps being in Australia and having the planets high in the sky, and being part of this community where everyone is so keen to help out a newbie, so thanks to everyone who provided advice to me along the way flowerred.gif .
 
Unfortunately I now have a case of aperture fever, anyone got the cure?

 

Andrew

 

P.S. My best shots below from my DSLR

 

Jupiter July 3 2019, re-coloured

Saturn 30 July 2019

 

And my best shots from my new ASI224MC

Animated Jupiter 29 August 2019
Saturn 29 August 2019

 


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#8 descott12

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Posted 13 September 2019 - 06:56 PM

Fantastic shots. I hope I can get half as good as that next year!



#9 DMach

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Posted 13 September 2019 - 10:53 PM

I consider it a pretty impactful year.


I see what you did there ... nice one!
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#10 DMach

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Posted 13 September 2019 - 10:58 PM

Unfortunately I now have a case of aperture fever, anyone got the cure?


Unfortunately there is of course only one cure ... you know you want to!! ;)
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#11 BQ Octantis

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Posted 14 September 2019 - 01:30 AM

I can't complain. Jupiter and Saturn are still near zenith at sunset, so I've still got a couple of months left to shoot them without heroics. And Neptune is just past opposition (9 Sep), so I'm eager to shoot it, too! Nonetheless, I had some major leaps forward in processing this season…and in capture, my rubber band shims are paying dividends—I got my first Saturn moon captures just this week!

 

Here a my lessons learned for this season (from aperture to output):

  • Two rubber band shims on the 18mm ortho give Saturn the same SNR as Jupiter through the 12.5mm.
  • Canon EOS cameras have a fixed shutter speed of 1/30sec in LiveView.
  • The best frame rate I can hope for out of AstroDSLR 1.3 is 8.6 fps.
  • The best frame rate I can hope for out of AstroDSLR 3.x is 5.2 fps.
  • I target a capture histogram maximum at ~45,000 (out of 65,536).
  • Lynkeos v2.10 is about 2× faster at opening .mp4s and stacking than v3.1.
  • I get a huge alignment speed increase in Lynkeos if I turn off image updating during align.
  • I can stack 200 seconds of Jupiter captures without rotation smudging.
  • I can stack 400 seconds of Saturn captures without rotation smudging.
  • I now do channel sharpness equalization in Photoshop before using wavelets in Lynkeos.
  • In Lynkeos I use a set of 8 wavelets spaced at intervals of 1.5x.
  • I use fractional wavelet values at the low end.
  • I need at least 1024 frames to form an image at 5.93ppAd.
  • Animated PNG is a far superior format to Animated GIF.
  • Microsoft browsers do not support APNG.

That is all.

 

EDIT: Whoops, no…there was also the find that PEC playback makes my tracking much simpler…in calm winds, it makes my tracking almost hands-free.

 

Cheers,

 

BQ


Edited by BQ Octantis, 14 September 2019 - 06:05 AM.

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#12 yock1960

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Posted 15 September 2019 - 03:25 PM

I'll echo Grant. After next year, we won't be here again until I'm 70 (pushing 71) and Saturn will be at 70 degrees elevation, so it really won't be that bad...assuming I'm still....interested.

 

Steve


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#13 kevinbreen

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Posted 18 September 2019 - 01:58 PM

My 11” has been like this all year.

 

D9FE4EBF-772D-47BC-87FB-15522E647E05.jpeg

 

Cue hilarious double-entendres...


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#14 descott12

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Posted 18 September 2019 - 02:06 PM

Hey, I am curious about the crayford focuser. I am assuming you swapped that out for the original SCT focuser?

Is there some advantage to doing so?

And how do you know were to permanently set the mirror?

Thanks



#15 aeroman4907

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Posted 18 September 2019 - 04:32 PM

Is that level or even pointing downward Kevin?
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#16 BQ Octantis

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Posted 19 September 2019 - 04:04 AM

My 11” has been like this all year.

 

Cue hilarious double-entendres...

That's a real bugger of an angle there, mate! My 7-inch has been like this all season (technically on the other side of the meridian):

 

IMG_20190919_182615s.jpg

Skywatcher 180 with Jupiter in sight, 2019-09-19 18:26 ACST

Outback Northern Territory, Australia

 

If it weren't for my right-angle finder scope and my star diagonal, my neck would be broken after three years of this!

 

BQ


Edited by BQ Octantis, 19 September 2019 - 05:42 AM.

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#17 DMach

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Posted 19 September 2019 - 04:58 AM

Mine spends the vast majority of its time like this, to combat the 24/7 70-80% humidity here:

 

C11_Dehumidi_small.jpg

 

I'm not having a repeat of the fungal growth I got on my 6SE OTA, if I can help it!

 

A very enjoyable season for me, being the "honeymoon" period with 11 inches. (Adding to the double-entendres there ...)

 

My favourite shots of the season would probably be this:

 

Jupiter 2019-05-25 00-26 v1 9 stacks 30pc.png

 

and this:

 

Saturn 2019-05-20 19-22 v2 rotated 33pc pd.png


Edited by DMach, 19 September 2019 - 05:00 AM.

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#18 kevinbreen

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Posted 19 September 2019 - 04:09 PM

Is that level or even pointing downward Kevin?


Not quite down Steve, so no need to install the HB2, yet, anyway!

#19 kevinbreen

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Posted 19 September 2019 - 04:12 PM

Mine spends the vast majority of its time like this, to combat the 24/7 70-80% humidity here:

C11_Dehumidi_small.jpg

I'm not having a repeat of the fungal growth I got on my 6SE OTA, if I can help it!

A very enjoyable season for me, being the "honeymoon" period with 11 inches. (Adding to the double-entendres there ...)

My favourite shots of the season would probably be this:

Jupiter 2019-05-25 00-26 v1 9 stacks 30pc.png

and this:

Saturn 2019-05-20 19-22 v2 rotated 33pc pd.png


Great images!

#20 kevinbreen

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Posted 19 September 2019 - 04:18 PM

Hey, I am curious about the crayford focuser. I am assuming you swapped that out for the original SCT focuser?
Is there some advantage to doing so?
And how do you know were to permanently set the mirror?
Thanks


Hey yourself.
No, it goes between the visual back and the image train.
Just get rough focus with your stock knob and use the motorised Crawford for fine focus, hands free.
No need to play with your knob so your mirror remains motionless.

#21 Jenz114

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Posted 20 September 2019 - 08:39 PM

Mine spends the vast majority of its time like this, to combat the 24/7 70-80% humidity here:

 

attachicon.gif C11_Dehumidi_small.jpg

 

I'm not having a repeat of the fungal growth I got on my 6SE OTA, if I can help it!

 

A very enjoyable season for me, being the "honeymoon" period with 11 inches. (Adding to the double-entendres there ...)

 

My favourite shots of the season would probably be this:

 

attachicon.gif Jupiter 2019-05-25 00-26 v1 9 stacks 30pc.png

 

and this:

 

attachicon.gif Saturn 2019-05-20 19-22 v2 rotated 33pc pd.png

Impressive results for the season!



#22 DMach

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Posted 20 September 2019 - 09:14 PM

Impressive results for the season!

Thank you Anthony!  :)


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#23 BQ Octantis

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Posted 20 September 2019 - 10:50 PM

I hadn't yet considered my best of the season. I didn't get a single session with "still as glass" seeing this year, but in mid-August I had two good nights that produced my best moon outcomes for Saturn and Jupiter:

 

20190811_007-009_w_moons_5.93ppAd.jpg

Saturn w/Rhea, Tethys & Dione, 2019-08-11

 

2019-08-15_001-003_derotated_w_ganymede_5.93ppAd.jpg

Jupiter w/Ganymede, 2019-08-15

 

 

My other highlight was animating a month of GRS progression back when it was interesting (click for full size 24-bit):

 

gallery_273658_9624_1907.gif

https://www.cloudyni...7586_214809.png

Jupiter GRS Progression 25 May - 28 June 2019

 

 

But the cat's meow was learning to create and host 24-bit stereo pair animations (click on each for full size 24-bit):

 

sml_gallery_273658_7586_496524.gif

https://www.cloudyni...586_5613657.png

Jupiter w/Oval BA & Io 2019-08-02

 

sml_gallery_273658_7586_412518.gif

https://www.cloudyni...586_1626377.png

Jupiter w/ GRS, Ganymede & Ethan's Impact 2019-08-08

 

post-273658-0-87482600-1565905757.gif

https://www.cloudyni...586_5151386.png

Jupiter w/GRS & Ganymede 2019-08-15

 

Cheers,

 

BQ


Edited by BQ Octantis, 20 September 2019 - 11:27 PM.

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#24 kevinbreen

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Posted Yesterday, 06:32 AM

Those animations are SWEET, BQ.

 

I really think the Jupiter/Saturn season is over for me now. But I'm really looking forward to Mars next year.

 

2019 2020.jpg

 

Left:      My scope's maximum angle all this year for Jupiter and Saturn

Right:    My scope's angle for Mars in 2020

 

Time to invest in a RACI illuminated finderscope! Maybe I'll get one from Santa.


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#25 BQ Octantis

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Posted Yesterday, 07:15 AM

Those animations are SWEET, BQ.

 

I really think the Jupiter/Saturn season is over for me now. But I'm really looking forward to Mars next year.

 

Left:      My scope's maximum angle all this year for Jupiter and Saturn

Right:    My scope's angle for Mars in 2020

 

Time to invest in a RACI illuminated finderscope! Maybe I'll get one from Santa.

Thanks, Kevin! The 200-second Jupiter capture lesson really stepped up my image quality, and for the first time the animated GIF format was the limiting factor. Hopefully user adoption will drive better CN support for APNG and other 24-bit animation formats.

 

I was just looking at the RACI finderscope a few days ago. But my wife and older son kicked off a new initiative on 1 September to save the world: no purchases of new items without serious consultation and debate with The Committee. And seeing as I already have the Orion 6×30 right-angle finderscope (as part of the set I got past The Committee three years ago), it's too tough a sell. Not sure if you have the same embuggerances…

 

BQ




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