Come join the friendliest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors.
Come join the friendliest, most engaging and inclusive astronomy forum geared for beginners and advanced telescope users, astrophotography devotees, plus check out our "Astro" goods vendors.
Forum rules
"We love seeing your work and welcome any and all sketches on this forum, but please note whether your sketch is a through-the-eyepiece sketch or your rendition from an existing image / painting."
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....
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!
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.
See Far Sticks: Antares Elita 103/1575, AOM FLT 105/1000, Bresser BV 127/1200, Nočný stopár 152/1200, Vyrobené doma 70/700, Stellarvue NHNG DX 80/552, TAL RS100/1000, Vixen SD115s/885 EQ: TAL MT-1, Vixen SXP, AXJ, AXD Az/Alt: AYO Digi II/ Argo Navis, Stellarvue M2C/ Argo Navis Tripods: Berlebach Planet (2), Uni 28 Astro, Report 372, TAL factory maple, Vixen ASG-CB90, Vixen AXD-TR102 Diagonals: Astro-Physics, Baader Amici, Baader Herschel, iStar Blue, Stellarvue DX, Takahashi prism, TAL, Vixen flip mirror Eyepieces: Antares to Zeiss The only culture I have is from yogurt My day was going well until... people
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.
"I am more than a sum of molecules.
I am more than a sum of memories or events.
I do not one day suddenly cease to be.
I am, before memory.
I am, before event.
I am"
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
Sky-Watcher 90mm f/13.8 Maksutov-Cassegrain on motorized Multimount
Orion Astroview 120ST f/5 Refractor on EQ3 mount
Celestron Comet Catcher 140mm f/3.64 Schmidt-Newtonian on alt-az mount
Celestron Omni XLT150R f/5 Refractor on CG4 mount with dual axis drives.
Orion 180mm f/15 Maksutov-Cassegrain on CG5-GT Goto mount.
Orion XT12i 12" f/4.9 Dobsonian Intelliscope.
Kamakura 7x35 Binoculars and Celestron SkyMaster 15x70 Binoculars. ZWO ASI 120MC camera.
>)))))*>
Bigzmey wrote: ↑Tue Sep 07, 2021 4:29 pm
Your Jupiter is up side down. JK 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 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. Amateur astronomer since 1970.
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.
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.