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Jupiter and Io - 30th December 2013

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#1 dweller25

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Posted 31 December 2013 - 08:06 AM

Used SAT24 and saw a 4 hour gap in the clouds/rain so set up as soon as the rain stopped and gradually the sky cleared :)

I was waiting for Io to start crossing Jupiter - this began just before 20:00UT.

Seeing was quite good - AII most of the time and I got some great views with the new Binoviewers - It's definitely easier to see more detail with them.

For the first time ever I saw the South Polar region was blotchy/mottled - tried to show this in the drawing.

Did this drawing at 20:05 - Takahashi FS-128, Binoviewer plus 18mm Orthoscopics giving approx x170. seeing AII, temp 5'C, altitude 32'. CM1=119, CM2=328

I had hoped that as Jupiter climbed to around 60' high it would show more detail but by 2230UT seeing had deteriorate to AIV !! and the clouds were coming back so it was time to pack up.

Happy New Year to all :) :)

** I have updated this drawing to highlight Io and added a bright area by the central blue festoon that I missed off **

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#2 PeterDob

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Posted 31 December 2013 - 08:11 AM

That's so lovely, David! Well done, and my best wishes for 2014! :D

Peter

#3 dweller25

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Posted 31 December 2013 - 08:12 AM

Thanks Peter - Happy New Year to you and all here on CN.

#4 kenrenard

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Posted 31 December 2013 - 08:21 AM

Nice work even in downhill conditions.

You caught some fine details.

Nice festoons.

Ken

#5 mike73

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Posted 31 December 2013 - 08:50 AM

Very nice David.
I also noticed the slightly darkening of the SPR compared to the white out on the NPR the other night.

I've missed a lot of decent observing sessions this winter from not setting up when there has been a 50/50 chance of clear skies, same goes for nights with patchy low cloud but great transparency and seeing above.
I've ordered a 'scope coat' to keep my new scope set up and ready to make the most of 2014.

Happy New year to you and everyone on CN. :)

#6 mike73

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Posted 31 December 2013 - 08:52 AM

Oh and one other thing...What does the CM1 and CM2 mean??

#7 dweller25

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Posted 31 December 2013 - 08:59 AM

Ken, Mike - thanks.

@Mike - The scope coat is a good idea - I had to rush all my gear back in the other night when it started raining very heavily - even though I was drawing Jupiter in a perfectly clear sky !!!

CM1 and CM2 are the central meridian longitude cooordinates - I find then useful so I can compare my drawings to others at the same revolution point.

Have you got the Mak yet ??

#8 mike73

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Posted 31 December 2013 - 09:30 AM

I'm hoping to pick the Mak/binoviewrers up from FLO when they open on Thursday.

Something struck me last night, I have a secondary heater on my 16", now for DSO's where transparency is the key I'm pretty sure the very small amount of heat it gives off will make little difference but for planets I have a feeling that it could be part of the problem of the poor views I was getting??!
Bad forecast here for the next week so no chance to see if I'm right about that but I just wish I thought of it before!

#9 dweller25

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Posted 31 December 2013 - 09:42 AM

Mike - I'm certain the heat from the heater will affect planetary views......Do your 8 and 12" scopes have heaters ???

#10 mike73

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Posted 31 December 2013 - 09:56 AM

I only have the 16" at the moment, my old 8" and 12" didn't have secondary heating.
I've read quite a lot of comments about Mak's being dew magnets(?!) but already decided not to use any heater tapes on mine, I'm just going to stick with a camping matt dew shield and if really necessary a quick blast with a hairdryer but this was when the penny dropped about my secondary heating on the 16"!

#11 dweller25

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Posted 31 December 2013 - 10:26 AM

Mike - I do not use heater bands on the Mak, just a long camping mat dewshield and a quick blast from the 12V hairdrier if required.

#12 Chopin

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Posted 31 December 2013 - 01:27 PM

David, this sketch is fantastic, especially for the sky conditions you had. Grabbing Io inside the Jupiter disk edge was quality observing on your part. Io typically sneaks over the limb and hides from me until well past the edge. Shadow transits are my favorite events to watch an Jove. Nicely done, bro.

#13 Asbytec

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Posted 31 December 2013 - 02:34 PM

{quote]I got some great views with the new Binoviewers - It's definitely easier to see more detail with them. [/quote]
You and Jason wanna take this to the bino forum, I'm becoming green with envy. :grin: (<---note the grin indicating an attempt at humor.) :lol:

Hey, yes, the SPR has some faint stuff down there that gives it a molted appearance sometimes. Let me repeat, "sometimes." You have peered into a difficult, low contrast realm and came out smelling like roses. Seeing anything down there is impressive, David. Great catch. I can't see it in your sketch, but that's just fine.

You stumbled onto a CM with some nice festoons. David, I am sorry you're session was cut short. I bet your Tak 128 wanted to eat Jupiter alive.

Hey, happy new year. (Okay, I think I got everybody. :) )

#14 dweller25

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Posted 31 December 2013 - 04:10 PM

Thanks Jason - to be honest Io was easy right on the limb as it stood out well against the darker edge, as it moved into Jupiters disk it disappeared.

Norme - it would take days to finish your drawings if you used binos :grin:

#15 niteskystargazer

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Posted 31 December 2013 - 04:53 PM

David,

Nice sketch of Dec. 30th Sun :cool:.

CS,KLU,

:thanx:,

Tom

#16 dweller25

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Posted 31 December 2013 - 06:08 PM

Tom

HNY

#17 dweller25

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Posted 01 January 2014 - 03:33 PM

I Found these photos on ALPO (Japan) taken by Mr Rizatto through a C11 at exactly the same time as I was drawing Jupiter. It looks like I got most things right but my south polar region is a bit off. Still quite pleased though.

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#18 Chopin

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Posted 01 January 2014 - 06:28 PM

Still a very accurate overall impression, David. Nice. You even caught that bright white area inside the midline festoon. Good eyes.

#19 Asbytec

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Posted 01 January 2014 - 08:47 PM

David, I don't think it's "off" entirely, if at all. It's pretty much right with BA's cloud drooping down and the darker SSTeB south and preceding it. And the trio of ovals on the preceding limb. It's very possible the two faint, low contrast light grey zones were very elusive. Because they are.

Oh, sweet. I caught one moon exactly like that on the preceding limb last night. Yea, that was a sweet view.

#20 Uwe Pilz

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Posted 02 January 2014 - 12:22 AM

Accurate and nice sketch, thank you.

#21 Dean Norris

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Posted 02 January 2014 - 03:54 PM

David,

Excellent sketch of Jupiter. It matches up well with the images you've included. That brilliant white oval in the EQZ next to the festoon is a great catch.

Dean

#22 dweller25

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Posted 02 January 2014 - 04:23 PM

Jason, Norme, Uwe and Dean - thanks very much for your kind comments






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