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Mars - a smoky bonus, September 17, C9.25

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#1 KiwiRay

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Posted 18 September 2020 - 12:55 AM

I wasn't expecting any new Mars images until the wildfire smoke cleared, so I consider these images to be a real bonus.  I had seen Mars around 10 pm, so I knew the smoke had thinned somewhat compared with the last few days, but when I got up at 3 am, the planet was obscured by clouds.  I re-set my alarm for 4 am, snoozed a little, and then got up to find a "clear" sky of orange haze, but no obvious clouds.  No stars either - forget about trying to check collimation. The smoke seemed to increase contrast and made it easier than usual to observe Mars in the eyepiece.  Seeing was very steady and I was able to use Sinus Gomer for focus, but I had to quadruple exposure time and increase gain to even get close to my usual histogram, meaning far fewer frames than usual. I'm quite happy with the results, though. They may be constrasty and the colour might be a little off - processing smoke-affected images to resemble my usual images is quite challenging - but they're images I didn't think I'd get at all, and may well end up as my best view of this face of Mars.

 

September 17, 11:24 UT

 

2020-09-17-1124_3b.png

 

September 17, 11:48 UT

 

2020-09-17-1147_6d.png

 

Nexstar Evolution 9.25 with 2x Barlow and ADC.  ZWO ASI224MC camera.


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#2 The_8_Bit_Zombie

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Posted 18 September 2020 - 03:45 AM

Lovely shots! Glad the smoke cleared enough for you to get some images.


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#3 KiwiRay

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Posted 18 September 2020 - 08:27 AM

Thanks, Zombie.  I used your much more detailed image from two nights earlier as a guide to what I should be seeing in this view!



#4 Kokatha man

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Posted 18 September 2020 - 09:09 PM

Nice pair Ray - Gomer Sinus comes out clearly in both of them! waytogo.gif waytogo.gif


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#5 sunnyday

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Posted 18 September 2020 - 09:27 PM

very nice details , sharp to , thanks .



#6 KiwiRay

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Posted 18 September 2020 - 09:31 PM

Thanks, Darryl!  Is it Sinus Gomer or Gomer Sinus?  I've seen both.  I suppose it depends on which order makes most sense in Latin, and I'm not a Latin scholar.


Edited by KiwiRay, 18 September 2020 - 10:21 PM.


#7 Kokatha man

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Posted 18 September 2020 - 10:01 PM

...your question has some relationship to my endeavours to create annotated disk images of Mars in my current thread Ray - whichever way is more correct, I prefer Kevin's response where he stated he had just recovered from a nasty case of this affliction..! rofl2.gif


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#8 Az Frank

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Posted 18 September 2020 - 10:30 PM

Excellent outcome Ray!
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#9 lynnelkriver

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Posted 18 September 2020 - 11:24 PM

Really well done!  I hope I can get some images like this in Minnesota!  Scott


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#10 Peregrinatum

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Posted 19 September 2020 - 09:33 AM

Nice image Ray!

 

I have the same scope and I'm getting ready to start my Mars quest for this opposition, what exp length and histogram % did you capture this with?


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#11 KiwiRay

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Posted 19 September 2020 - 09:51 AM

Nice image Ray!

 

I have the same scope and I'm getting ready to start my Mars quest for this opposition, what exp length and histogram % did you capture this with?

Prior to the smoke, I had been using just 2 ms for exposure time (Mars is really bright!) with a 30-35% histogram. With these images, I used 8 ms and had a around a 25% histogram.

 

Good luck with your imagining.



#12 GSBass

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Posted 19 September 2020 - 11:35 AM

Look great, we are still clouded in down south from sally remnants and seeing is predicted below average a couple of days out so in a holding pattern


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