Here's Ganymede's shadow transiting Jupiter on 11/10/24:
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| Jupiter 2024-11-10 08:41.5 UTC |
My goals for the evening were quick test shots of saturn and jupiter
saturn was disappointing with mediocre seeing at low altitude,
but when i turned to jupiter the seeing improved dramatically
this combined with the GRS and a Ganymede shadow transit led to sleep deprivation.
Here's an animation of a portion of the shadow transit:
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| Jupiter 2024-11-10 08:24.8 to 08:48.6 UTC |
wide view:
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| Jupiter and moons 2024-11-10 08:19.9 UTC |
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| Saturn and a few moons 2024-11-10 07:09 UTC |
Imaging details:
ZWO ASI664MC
sunobserver eADC from astro hutech
celestron 11" Edge HD, no barlow
East Bluff, CA
East Bluff, CA
11/10/24
90 second captures
Shutter=1.000 ms
Histogram=61%
gain 431
245 fps
captured with firecapture
stacked in autostakkert (upsampled 3x)
combined in winjupos
processed in registax and photoshop
stacked in autostakkert (upsampled 3x)
combined in winjupos
processed in registax and photoshop
down sampled 50% for a final 1.5x for the first shot
1x for the animation
.5x for the wide field.
saturn was imaged low in the sky earlier that evening
the seeing was mush down low, but the eADC did well.
This was my third night out with the eADC
the first required a bit of fiddling learning the controls/modes
the numbers on the readout are comically small.
i had to magnify it with my cell phone
the alignment was good, but not perfect.
the second night i dialed in the alignment perfectly, but the seeing degraded.
the third night, i just plugged the thing in,
didn't touch the controls
the correction was perfect all across the sky.
very impressive.
The ADC tuning tab in firecapture helped align the ADC:
winjupos continues to show it's value:
the image derotation section has an option to correct the position of planetary moons and their shadows.
this allows you to stack individual moon images in one fell swoop with image derotation.
hence more apparent detail on ganymede than i've ever captured before.
the shadow stacking didn't work out as well, leaving some artifacts (removed in photoshop), but it did mask the shadow out from all the images not at the reference time, so a help there.
here's a winjupos screen shot accurately showing distortion of the shadow on the edge of jupiter and even the penumbral halo:
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| winjupos screen shot showing ganymede and shadow positions |
