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High resolution imaging of mutual events
of the Galilean moons 2014/2015 John Sussenbach en Willem Kivits
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1. Potentials of amateur high resolution imaging
Willem Kivits: 20 inch Newtonian John Sussenbach: C14
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High resolution imaging today
” WK JS Imaging with the C14 and ASI224MC camera
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Comparing the big Jovian moons with the Earth-Moon system
1.15” ” ” ” Io Europa Ganymede Callisto
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Triple shadow transit 12 October 2013
Ganymede Io Europa
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Procedures 1.Capturing the avi’s
-Telescopes: C14 f/25 - f/40 (JS and WK) Newtonian inch (WK) - Camera’s: QHY5LII (CMOS) DMK618 (Sony ICX618 chip) - Filters: , 685 and 807 LP nm - Capturing: frames (60 sec at 100 fps)
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2. Processing of the avi’s
- centering with PIPP ( sites.google.com/site/astropipp ) - preprocessing with Photoshop - (hand selection) - final processing with Autostakkert or Registax
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High resolution imaging of Ganymedes
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2. Mutual events of the Jovian moons
a. Occultations
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Close conjunction of Ganymede and Europa 1 January 2015 UT Minimal separation 0.03”
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Occultation of Io by Callisto 7 January 2015
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Occultation of Ganymede by Io 12 February 2015
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2. Mutual events of the Jovian moons
b. Eclipses
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Umbra and Penumbra
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Selection procedure Eclipse of Callisto by Ganymede 25 November 2014
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Stacking 100 best frames (hand selection)
25 November 2014
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Masterframes
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Stacking best frames with 35% master frame
25 November 2014
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Ganymede eclpses Callisto 25 November 2014 (C14)
03.06 UT – UT
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Eclipse of Callisto by Ganymede
25 November 2014 Willem Kivits
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3. Special effects around opposition
(6 February h UT)
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Scattered light on Ganymede
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Europa occults and eclipses Io 7 February 2015
Opposition 6 February h UT
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4. Different types of eclipses
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Europa occults and eclipses Io 7 February 2015
AS2! stack 100 best handpicked 100 best + 35% master
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4. Different types of eclipses
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4. Different types of eclipses
Winjupos 4. Different types of eclipses
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Europa eclipses Io 22 February 2015
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Io eclipses Europa 22 February 2015
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Io eclipses Europa 22 February 2015
Measured with Aperture Photometry Tool
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Ganymede eclipses Callisto 2 February 2015 (1)
WK
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Ganymede eclipses Callisto 2 February 2015(2)
Distance 2.9 million km apart
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Europa eclipses Io 11-3-2015 WK
Io eclipses Ganymede WK
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Io eclipses Ganymede 13 March 2015
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Io eclipses Ganymede 13 March 2015 WK
UT
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Io eclipses Ganymede 13 March 2015 WK
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Next opportunity in 2021! Io eclipses Europa
23 May UT Unfortunately Jupiter is then in Sagitarius: In Holland only 20 degrees above the horizon!
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