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Jupiter Ganymede Mars & Very Damp!

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#1 David Gray

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Posted 27 September 2013 - 04:47 AM

The seeing was getting better and better as the dewing of the D-K optical window got more and more frequent. A lot of climbing the stepladder with the hair dryer!

Cloud put an end to things but I grabbed a look at the moon (x665) when seeing must have been near-perfect with just enough cloud-dimming to let me catch many small craters/craterlets in Plato & Archimedes – the Alpine Valley rille not just a hairline but a jagged ‘crack’ – wow!!

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#2 Rich (RLTYS)

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Posted 27 September 2013 - 05:27 AM

WOW!!!!!!!! :bow: :bow: :bow: :ooo: :ooo: :ooo:

Rich (RLTYS)

#3 David Gray

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Posted 27 September 2013 - 05:58 AM

Much appreciated Rich.

A bit of a grueling session yesterday and the internet would not let me send the results to CN nor ALPO-Japan! :mad:

Cheers,
David

#4 dyslexic nam

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Posted 28 September 2013 - 09:30 AM

Amazing sketches.

#5 azure1961p

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Posted 28 September 2013 - 10:06 AM

Dave, the long lived dark spot here on the CM seems to have a two tone aspect that seems curious. Its amazing how far this has migrated in a year. I like the chambered trail following the GRS in the SEB as well as Mars of course. The large polar cap is quite the feature now. I'm hoping to glimpse it before it thaws out into a tiny ellipse - again.

Pete

#6 Asbytec

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Posted 28 September 2013 - 10:37 PM

David, you should be posting these in the imaging forum. :grin:

#7 David Gray

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Posted 29 September 2013 - 05:18 AM

Many thanks all.

Norme - Imaging Forum: had I got all the detail I could see might have been tempted! Not really - unless assistance of the hair-dryer counts! UK observer J.B. Murray once said with regard to a stunning view of Jupiter with the Mill Hill (London) 18" refractor that this was about the maximum aperture for the planet (visual). Not because larger would not show more but that it becomes impossible to draw it all! J.B. a far more accomplished draughtsman/artist than me - most certainly back then (60s/70s).

Cheers,
David.

#8 David Gray

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Posted 29 September 2013 - 05:25 AM

Dave, the long lived dark spot here on the CM seems to have a two tone aspect that seems curious.


Pete: I'm not clear if you mean Jupiter but two tone spot you mention - is it not Ganymede (in transit)?

Cheers,
Dave

#9 azure1961p

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Posted 29 September 2013 - 07:21 AM

Well that would explain things wouldn't it? My oversight.

Pete

#10 Asbytec

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Posted 29 September 2013 - 08:05 AM

Dave, nice thing about a 6" aperture, it's just right for the amount of detail before it rotates out of view. Yea, I bet, larger aperture would be a real task.

#11 David Gray

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Posted 29 September 2013 - 08:54 AM

Yes fine Jovian detail is undeniably the province of the imager for recording; but it's still great when seen with relative ease :).

I have just had a look on ALPO-Japan for the images on that date/time and I can see that I was off position-wise here and there. In particular Ganymede in relation to the three small SST ovals: I recall making it north of the midway twixt two of them but got the wrong pairing it seems!

I will give blame the dew conditions and the hair-dryer stepladder-gymnastics for some of it....!!

That was a rough session and some 'burnout' was hanging over me the rest of that day and when our internet went haywire that put the cap on it :mad:. I relish the drawing challenge; but heavy dewing associated with very good seeing is usually the norm with this season.

Cheers,
David.

#12 ericj

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Posted 03 October 2013 - 08:38 AM

Wonderful sketches as always David :bow:.

Best,

Eric

#13 David Gray

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Posted 03 October 2013 - 10:13 AM

Thanks Eric: hoping for one (or two - or more!) of that triple-shadow event.

Cheers,
David

#14 highfnum

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Posted 04 October 2013 - 08:07 AM

nice drawings

#15 David Gray

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Posted 04 October 2013 - 11:30 AM

Thanks - much appreciated.






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