Jupiter, transit IO and shadow transit 09-06-2021

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John Baars Netherlands
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Jupiter, transit IO and shadow transit 09-06-2021

#1

Post by John Baars »


On Sunday I had already thoroughly enjoyed the good seeing and transparency when I looked at Jupiter with the 120mm Evostar. Last Monday it was clear again. Still saturated from the previous day, I thought I could play with the two large planets and my 102 mm Makje for half an hour. The seeing was less as well as the transparency. You see, I thought.
But wait a minute ....... what kind of dark spot is that? I soon recognized a shadow transit. And there was still some more "rubble" visible on the planet. To my delight it turned out that the Great Red Spot actually made an appearance. I enjoyed the image, until I realized that where there are shadow transitions, there are often moon transits too; just check in SkySafari and yes IO was less than half an hour away from the edge. This time I wanted to experience the slow appearance of the light spot of IO. Never once I thought about the possibility of setting up a bigger telescope. Painfully slowly, the bright wick of IO glowed very gradually. A magnificent sight. And so I thought of making a sketch of that. Finished right in. And it became quite a bit later.... :D

Magnifications used were 120X and 93X with an 11mm Nagler and a 14mm Morpheus, respectively. The instrument as mentioned, a 102mm Maksutov on Alt/Az mount. Time approximately 20:22 UTC. I put some details on a bit more heavily than the faded sketch from last time.. for example, the red spot could hardly be called orange.
Enjoy watching!
Jupiter September 06 -2021 final.jpg
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX.
GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets).
Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5.
Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS, *Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40
Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt.
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Bigzmey United States of America
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Re: Jupiter, transition IO and shadow transition 09-06-2021

#2

Post by Bigzmey »


Your Jupiter is up side down. JK :D Great sketch John!

Interesting that Io appeared to you as a white dot. When I see moon transits, they are typically beige or brown.
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
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Re: Jupiter, transition IO and shadow transition 09-06-2021

#3

Post by WilliamPaolini »


Absolutely LOVE that sketch!! :Clap:
-Bill

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Re: Jupiter, transition IO and shadow transition 09-06-2021

#4

Post by Lady Fraktor »


Agreed! A great sketch John.
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Re: Jupiter, transition IO and shadow transition 09-06-2021

#5

Post by John Donne »


Beautiful John !
We have shared a similar moment I see.
These are wonderful events to witness.
Your sketch is wonderful, much more than I have done with my schematics.
When ganymede finished its transit it looked like a tiny white pimple growing out of Jupiter, then it seemed to "pop" off and separate. Quite a show !
Thank you John.
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Re: Jupiter, transition IO and shadow transition 09-06-2021

#6

Post by Makuser »


Hello John. A great Jupiter and Io transit and shadow sketch using the 102 mm Makje telescope. Your artistic rendition shows the equatorial belting and the GRS nicely. Thanks for sharing your work with us on here John, and the best of wishes for many clear skies.
Marshall
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John Baars Netherlands
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Re: Jupiter, transition IO and shadow transition 09-06-2021

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Post by John Baars »


Bigzmey wrote: Tue Sep 07, 2021 4:29 pm Your Jupiter is up side down. JK :D Great sketch John!

Interesting that Io appeared to you as a wide dot. When I see moon transits, they are typically beige or brown.
Thanks! It is the optics doing the upside down trick :lol: Looking into a 90 degrees turned diagonal.
The small aperture is responsible for a temporary invisibility of IO during transit in this observation. With IO halfway the planet she becomes invisible for the background is too bright. When she arrives at the darker limb she becomes visible again as a bright yellow dot.

It is quite a nice sight. One moment you see the plain bright background, next moment you realize you observe a somewhat brighter spot. It disappears again and a few moments later it reappears. This is repeated until a permanent bright spot is observed. Like a dying candle, but reversed and slower.

For sake of visibility in the sketch I made IO white. Dark Callisto is the only moon that stays visible in this telescope during the whole transit. I have seen transits of other moons with bigger telescopes, they matched the description you made.
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX.
GrabnGo on Alt/AZ : *SW Startravel 102 F/5 refractor( widefield, Sun, push-to), *OMC140 Maksutov F/14.3 ( planets).
Most used Eyepieces: *Panoptic 24, *Morpheus 14, *Leica ASPH zoom, *Zeiss barlow, *Pentax XO5.
Commonly used bino's : *Jena 10X50 , * Canon 10X30 IS, *Swarovski Habicht 7X42, * Celestron 15X70, *Kasai 2.3X40
Rijswijk Public Observatory: * Astro-Physics Starfire 130 f/8, * 6 inch Newton, * C9.25, * Meade 14 inch LX600 ACF, *Lunt.
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Re: Jupiter, transit IO and shadow transit 09-06-2021

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Post by AstroBee »


Great sketch John. Such dedication at the eyepiece to draw like this.
Me, I just start the imaging sequence and sleep in the back of my SUV till it's done.
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#9

Post by mariosi »


Beautiful drawing! You captured the details very well...excellent work.
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#10

Post by Graeme1858 »


John Baars wrote: Tue Sep 07, 2021 3:37 pm ....just check in SkySafari and yes IO was less than half an hour away from the edge.

Alternatively, you could check the Forum Portal Calendar! The next one listed is Callisto on the 17th.

That's a great sketch John.

Regards

Graeme
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#11

Post by SparWeb »


John,
I think this is the best sketch of Jupiter I have seen.
How do I click the like button twice?
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#12

Post by messier 111 »


superb work , thx .
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#13

Post by Mirrorgirl »


Hi John

Brilliant image thank you
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#14

Post by Richard »


Nice sketch and nice with a small Mac , I normally only see that detail with a bigger scope
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Re: Jupiter, transit IO and shadow transit 09-06-2021

#15

Post by Greenman »


Very nice John, when I first saw the vertically squashed appearance of Jupiter I though my optics were odd, you have captured the whole appearance and geometry with great style. I hope to see one of these transits one day, shadow’s yes, but no transits so far, thanks for the clear sketch of one.
Cheers,

Tony.

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