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David Gray
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Reged: 08/06/12

Loc: Co. Durham UK
Jupiter Ganymede Mars & Very Damp! new
      #6103529 - 09/27/13 05:47 AM Attachment (72 downloads)

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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Rich (RLTYS)Moderator
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Reged: 12/18/04

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Re: Jupiter Ganymede Mars & Very Damp! new [Re: David Gray]
      #6103556 - 09/27/13 06:27 AM

WOW!!!!!!!!

Rich (RLTYS)


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David Gray
sage
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Reged: 08/06/12

Loc: Co. Durham UK
Re: Jupiter Ganymede Mars & Very Damp! new [Re: Rich (RLTYS)]
      #6103573 - 09/27/13 06:58 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!

Cheers,
David


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dyslexic nam
Carpal Tunnel
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Reged: 01/28/08

Loc: PEI, Canada
Re: Jupiter Ganymede Mars & Very Damp! new [Re: David Gray]
      #6105652 - 09/28/13 10:30 AM

Amazing sketches.

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azure1961p
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Reged: 01/17/09

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Re: Jupiter Ganymede Mars & Very Damp! new [Re: dyslexic nam]
      #6105720 - 09/28/13 11:06 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

Edited by azure1961p (09/28/13 11:06 AM)


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Asbytec
Guy in a furry hat
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Reged: 08/08/07

Loc: La Union, PI
Re: Jupiter Ganymede Mars & Very Damp! new [Re: azure1961p]
      #6106771 - 09/28/13 11:37 PM

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

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David Gray
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Reged: 08/06/12

Loc: Co. Durham UK
Re: Jupiter Ganymede Mars & Very Damp! new [Re: dyslexic nam]
      #6106981 - 09/29/13 06:18 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.


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David Gray
sage
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Reged: 08/06/12

Loc: Co. Durham UK
Re: Jupiter Ganymede Mars & Very Damp! new [Re: azure1961p]
      #6106984 - 09/29/13 06:25 AM

Quote:

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


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azure1961p
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Reged: 01/17/09

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Re: Jupiter Ganymede Mars & Very Damp! new [Re: David Gray]
      #6107051 - 09/29/13 08:21 AM

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

Pete


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Asbytec
Guy in a furry hat
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Reged: 08/08/07

Loc: La Union, PI
Re: Jupiter Ganymede Mars & Very Damp! new [Re: azure1961p]
      #6107081 - 09/29/13 09:05 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.

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David Gray
sage
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Reged: 08/06/12

Loc: Co. Durham UK
Re: Jupiter Ganymede Mars & Very Damp! new [Re: Asbytec]
      #6107118 - 09/29/13 09:54 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 . I relish the drawing challenge; but heavy dewing associated with very good seeing is usually the norm with this season.

Cheers,
David.

Edited by David Gray (09/29/13 04:49 PM)


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ericj
professor emeritus


Reged: 02/17/05

Re: Jupiter Ganymede Mars & Very Damp! new [Re: David Gray]
      #6114785 - 10/03/13 09:38 AM

Wonderful sketches as always David .

Best,

Eric


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David Gray
sage
*****

Reged: 08/06/12

Loc: Co. Durham UK
Re: Jupiter Ganymede Mars & Very Damp! new [Re: ericj]
      #6114936 - 10/03/13 11:13 AM

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

Cheers,
David


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highfnum
Carpal Tunnel
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Reged: 09/06/06

Loc: NE USA
Re: Jupiter Ganymede Mars & Very Damp! new [Re: David Gray]
      #6116781 - 10/04/13 09:07 AM

nice drawings

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David Gray
sage
*****

Reged: 08/06/12

Loc: Co. Durham UK
Re: Jupiter Ganymede Mars & Very Damp! [Re: highfnum]
      #6117181 - 10/04/13 12:30 PM

Thanks - much appreciated.

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