had a rare warm summer night with clear skies and decent seeing. unfortunately my mount is on the fritz, so i was unable to get out the big scope, but had a nice session with my C8 cruising the summer sky, then finished off imaging saturn and jupiter which just happen to have the GRS in view:
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| Jupiter 9/4/22 07:00 UTC click image for large size |
It's been a while since i've imaged saturn, the ring tilt is really decreasing. better view of the globe, north pole difficult:
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| Saturn 9/4/22 07:15 UTC |
some models predict all the colors of the rainbow can be detected at the edges of an eclipsed moon. here's an image at the end of the total eclipse with the color saturation boosted to bring out the color:
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| 5/15/22 lunar eclipse color saturation boosted |
A discussion on the cloudy nights forum covers it. There are 3 phenomenon leading to color on the eclipsed moon:
1. preferential scattering of shorter wavelength light as it passes through the earth's atmosphere (red sunset effect).
2. atmospheric refraction of light (prism effect).
3. preferential absorption of red light by ozone in the upper atmosphere (blue filter effect).
