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Jupiter - 21st December 2013

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#1 dweller25

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Posted 22 December 2013 - 05:34 AM

Went out at 21:30UT and seeing was quite good (AII) with nice detail on Jupiter, including lots of blue festoons on the NEB. Decided to wait until 23:30UT to do a drawing as the GRS and an Io transit would be visible and Jupiter would be even higher - so more detail to see..........

Wrong !! - at 23:30UT seeing had reduced to AIII !!!

The GRS was visible - which now looks Orange and Io was just about to start crossing the surface of Jupiter.

Here is the drawing I did at 23:50UT using an IM 715 Maksutov at x152, Jupiter was 57' high and the temperature was 4'C, CM1=274.7' and CM2=191.4'

Io is now just on the limb of Jupiter and it's shadow is preceding it.

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#2 Asbytec

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Posted 22 December 2013 - 07:22 AM

David, I cringe at the idea you have such a nice telescope and are limited by the atmosphere as winter sets in. We all are limited to some degree. But, I just cringe because I know what your scope can do, as are you surely, and I can only wish for better skies for you to allow it to perform as advertised.

That being said, you're noticing some things. Yes, the GRS is notable in it's strong hue and a transit is always nice. You noticed some darker clouds in the north and really see the southern region pretty well. And you got out in the cold and did the observation. As Ken said in another thread, that's what this is all about. And at least you can do so, here it's senseless to even consider setting up under warm overcast skies from May to December.

You know, we are just coming out of 6 months of perpetual cloudiness during the tropical rainy season and are fortunate to have the observing season ahead of us, which includes Jupiter and Mars this time of year. Again, a stroke of good fortune and timing.

Surely the winter in the north temperate latitudes seems to be ending the good seeing and bringing with it chilly temperatures. Effectively, it's thwarting the north's good observing weather. The situations will reverse in Spring when your conditions improve and our's deteriorates. We hardly ever get to view the Sagittarius region and the summer Milky Way.

So, take it from one who lives vicariously for 6 months, I understand the frustration. Got it, again tonight, as some unseasonable cloud cover lingers. Jupiter is in full bloom and it's very likely we just can't see it. Maybe in a few days.

#3 Chopin

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Posted 22 December 2013 - 07:23 AM

That's a really beautifully scaled image, David. The representation of the GRS and the shadow of Io are both very nicely drawn.

#4 azure1961p

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Posted 22 December 2013 - 08:51 AM

That's about what I see in Pickering 3-4. Nice observation and rendering tho all things considered.

Pete

#5 Special Ed

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Posted 22 December 2013 - 09:13 AM

Went out at 21:30UT and seeing was quite good (AII) with nice detail on Jupiter, including lots of blue festoons on the NEB. Decided to wait until 23:30UT to do a drawing as the GRS and an Io transit would be visible and Jupiter would be even higher - so more detail to see..........

Wrong !! - at 23:30UT seeing had reduced to AIII !!!


Ouch!

You pulled a sketch out anyway--good for you. Io looks great on the limb--nicely done. The moons always look 3-D to me right after they ingress the limb. The GRS is also nicely rendered.

We who are having winter now need the companionship of the forums--I tthink it helps us get out there and do what needs to be done. :)

#6 dweller25

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Posted 22 December 2013 - 10:11 AM

Thanks guys - I hope to go out this evening and catch the GRS again......

#7 frank5817

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Posted 22 December 2013 - 04:32 PM

David,

Regardless, a very fine sketch.
I can recall stopping and abandoning sketches
with the seeing going to horrible.
It is good you pushed to the end.

Frank :)

#8 kenrenard

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Posted 23 December 2013 - 06:54 AM

David,
Good work you captured your seeing albeit bad. I waited one night to observe since it was so clear and beautiful until after we gave the kids a bath. In less than 1 hour it went from clear to clouds.


The observer always waits on mother nature.


Ken

#9 dweller25

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Posted 23 December 2013 - 07:52 AM

Thanks guys.

Ken you are right - this hobby is all about patience....

#10 kraterkid

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Posted 23 December 2013 - 02:32 PM

David, despite the seeing you pushed ahead to produce a great sketch. Well done!

#11 dweller25

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Posted 23 December 2013 - 05:04 PM

Thanks Rich

#12 niteskystargazer

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Posted 23 December 2013 - 05:07 PM

David,

Good sketch of Jupiter :).

CS,KLU,

:thanx:,

Tom






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