I think this green line has to be the longest cosmic ray I've ever seen (not a satellite trail)

Interesting things
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https://www.legacysurvey.org//viewer/?ra=203.9534&dec=-1.0042&layer=ls-dr9&zoom=13

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image
image1190×780 69 KB

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So why is it bending or being deflected? Could the Earth’s magnetic field cause it to do this across the CCD? Or is there a strong magnet in the camera itself :sweat_smile:

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They can bounce around by hitting atoms in the CCD

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Makes sense :grin:

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Does the color hint at its wavelength or is that an artifact of the instrumentation?

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In these images, we get color information by taking separate exposures with different filters in front of the sensors. (And usually multiple exposures per filter, often years apart). Cosmic rays hit the sensor directly - they don’t go through the filters - so the color just tells you which exposure it hit – if it’s an exposure that we map to Green when making color images, then it’s green!
cheers,
dustin