Jupiter sketch versus photo.

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John Baars Netherlands
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Jupiter sketch versus photo.

#1

Post by John Baars »


On 12 november 2022 I sketched Jupiter. As a sketcher it is always interesting to know what one has missed. Luckily one of the members of the Dutch Astroforum made a photograph around the same time through a C11 at f/20. He was not amused by the rather severe seeing, neither was I for that matter.
He gave permission to use his photograph for comparison with the sketch.

Hereby the result:
Foto MarioM-Schets JB.png

Photo with consent of MarioM, Astroforum.nl

It is obvious which details were missed while sketching, which I had trouble with, and which are the same. Overall, the similarities are quite decent anyway.
Refractors in frequency of use : *SW Evostar 120ED F/7.5 (all round ), * Vixen 102ED F/9 (vintage), both on Vixen GPDX.
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Re: Jupiter sketch versus photo.

#2

Post by Unitron48 »


Great similarity, I'd say. Well done, John.

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Re: Jupiter sketch versus photo.

#3

Post by Butterfly Maiden »


Yes, as you said John there are some differences, but still pretty good rendition from you :smile:

Not bad at all ;)
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Re: Jupiter sketch versus photo.

#4

Post by Juno16 »


John,

That is an absolutely fantastic sketch! The details that you captured in your sketch are fabulous! Great work!
Jim

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Re: Jupiter sketch versus photo.

#5

Post by messier 111 »


fine work , thx .
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Re: Jupiter sketch versus photo.

#6

Post by helicon »


Very close to what is seen in the photo....!
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Re: Jupiter sketch versus photo.

#7

Post by Makuser »


Hi John. Well you did a great job of transferring your eyepiece view onto the sketch paper. Your perception was very much like the image from MarioM. Very nice art work John so keep at it.
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Re: Jupiter sketch versus photo.

#8

Post by Bigzmey »


These is great comparison. Thanks for posting it John! I believe observing planets is an acquired skill like galaxy hunting or double splitting. The more you focus the more details one can resolve.
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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Re: Jupiter sketch versus photo.

#9

Post by John Baars »


Unitron48 wrote: Mon Nov 14, 2022 10:56 am Great similarity, I'd say. Well done, John.

Dave
Thanks Dave.
Butterfly Maiden wrote: Mon Nov 14, 2022 11:50 am Yes, as you said John there are some differences, but still pretty good rendition from you :smile:

Not bad at all ;)
Thanks Vanessa. Yes, I thought as much.
Juno16 wrote: Mon Nov 14, 2022 12:31 pm John,

That is an absolutely fantastic sketch! The details that you captured in your sketch are fabulous! Great work!
Thanks, The seeing didn't make it easier. I think with better seeing the turbulent area near the GRS would have been more precise.

messier 111 wrote: Mon Nov 14, 2022 1:43 pm fine work , thx .
Thank you!
helicon wrote: Mon Nov 14, 2022 2:34 pm Very close to what is seen in the photo....!
Thanks, it is clear that some details should have been more exaggerated.
Makuser wrote: Mon Nov 14, 2022 2:43 pm Hi John. Well you did a great job of transferring your eyepiece view onto the sketch paper. Your perception was very much like the image from MarioM. Very nice art work John so keep at it.
Thanks, I'll keep to it.
Bigzmey wrote: Mon Nov 14, 2022 4:54 pm These is great comparison. Thanks for posting it John! I believe observing planets is an acquired skill like galaxy hunting or double splitting. The more you focus the more details one can resolve.
Observing planets, i.e. noticing minuscule details and contrasts on a tiny ball is indeed a skill in itself. Just magnifying the sphere doesn't help.
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.
Amateur astronomer since 1970.
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Re: Jupiter sketch versus photo.

#10

Post by Richard »


I thing its pretty good certainly 100% better than I could ever do
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Re: Jupiter sketch versus photo.

#11

Post by PeterD »


John, that is an excellent sketch. Just wondering, what was the scope/eyepiece you used for this one?
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Re: Jupiter sketch versus photo.

#12

Post by John Baars »


PeterD wrote: Tue Nov 15, 2022 8:43 am John, that is an excellent sketch. Just wondering, what was the scope/eyepiece you used for this one?
Thanks.
What I used:
The telescope was a 120 mm f/7.5 SW Evostar.
Diagonal, a Baader BBHS mirror.
Eyepiece, a Leica ASPH 17.8- 8.9 mm zoom.
A Vixen DX barlow 2X.
I used an Atmospheric Dispersion Corrector as well.
Last but certainly not least, an experienced eye.
Each in its own makes only a very slight difference, but the team as a whole does the job.
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.
Amateur astronomer since 1970.
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Re: Jupiter sketch versus photo.

#13

Post by Lady Fraktor »


Another excellent observation and sketch John.
You have managed to capture the details nicely on the comparison.
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Re: Jupiter sketch versus photo.

#14

Post by Bigzmey »


John Baars wrote: Tue Nov 15, 2022 7:01 pm
PeterD wrote: Tue Nov 15, 2022 8:43 am John, that is an excellent sketch. Just wondering, what was the scope/eyepiece you used for this one?
Thanks.
What I used:
The telescope was a 120 f/7.5 mm SW Evostar.
Diagonal, a Baader BBHS mirror.
Eyepiece, a Leica ASPH 17.8- 8.9 mm zoom.
A Vixen DX barlow 2X.
I used an Atmospheric Dispersion Corrector as well.
Last but certainly not least, an experienced eye.
Each in its own makes only a very slight difference, but the team as a whole does the job.
Hi John. To follow up on the Atmospheric Dispersion Corrector. Do you always use it, or only when the dispersion is easily detectable by eye?
Scopes: Stellarvue: SV102ED; Celestron: 9.25" EdgeHD, 8" SCT, 150ST, Onyx 80ED; iOptron: Hankmeister 6" Mak; SW: 7" Mak; Meade: 80ST.
Mounts: SW: SkyTee2, AzGTi; iOptron: AZMP; ES: Twilight I; Bresser: EXOS2; UA: MicroStar.
Binos: APM: 100-90 APO; Canon: IS 15x50; Orion: Binoviewer, LG II 15x70, WV 10x50, Nikon: AE 16x50, 10x50, 8x40.
EPs: Pentax: XWs & XFs; TeleVue: Delites, Panoptic & Plossls; ES: 68, 62; Vixen: SLVs; Baader: BCOs, Aspherics, Mark IV.
Diagonals: Baader: BBHS mirror, Zeiss Spec T2 prism, Clicklock dielectric; TeleVue: Evebrite dielectric; AltairAstro: 2" prism.
Filters: Lumicon: DeepSky, UHC, OIII, H-beta; Baader: Moon & SkyGlow, Contrast Booster, UHC-S, 6-color set; Astronomik: UHC.

Observing: DSOs: 3106 (Completed: Messier, Herschel 1, 2, 3. In progress: H2,500: 2180, S110: 77). Doubles: 2382, Comets: 34, Asteroids: 255
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Re: Jupiter sketch versus photo.

#15

Post by John Baars »


Bigzmey wrote: Tue Nov 15, 2022 7:56 pm To follow up on the Atmospheric Dispersion Corrector. Do you always use it, or only when the dispersion is easily detectable by eye?
Hi, I only use it when dispersion is apparent. It really makes some difference, it puts blue and red waves back to where they belong. As a result details become a bit easier to spot. I always describe it as if a very thin veil is pulled away.
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.
Amateur astronomer since 1970.
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Re: Jupiter sketch versus photo.

#16

Post by mariosi »


S-U-P-E-R-B !
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Re: Jupiter sketch versus photo.

#17

Post by Falcon 63 »


Excellent work John.
Telescopes Saxon 10" x 1200 Dobsonian, Bresser 114 x 500 Dobsonian, Saxon 70 x 400 Refractor.
Eyepieces ES 82* 2" 18mm, 1.25" 11mm, GSO 2" 30mm superview, Seben mzt 8-24, Sky Watcher 58* 4mm and various Plossls.
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Other Skywatcher Solar System Imager
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