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Is it a Plane? a Satellite?


ChrisLX200

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No! it's a mega cosmic ray hit :)   Whilst taking a set of darks I got this beauty (?), now I've seen a lot of cosmic ray hits - dim, short traces but nothing like this before. Maybe it just happened to hit exactly along the plane of the sensor but the energy in this thing is phenomenal.

DARKS_600sec_2x2_DARK10_frame23_zps5c290

ChrisH

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looks like a satellite

If it was on a "light" exposure, yes most probably  - though a plane at high altitude, reflecting sunlight could, I suppose, look like that.

Generally whenever I've had planes fly into my FoV, they have been at low level and the track they leave is from their lights. Since there are usually high-intensity flashing lights on the wingtips, the track appears as dotted lines.

However, to get that on a dark frame? Spooky!

Can you track-back from the orientation of the camera to wotk out where the "hit" originated?

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Cool! I bet you can't catch another!

No way :) I've been taking darks now for 2 days solid, updating my library of calibration files, I've seen nothing like that. That particle went through 40miles of atmosphere, my shed roof, the metal casing on the camera, and half the width of the sensor (and for all I know didn't stop there - it might just have not lined up exactly).

ChrisH

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Not a plane because there are no aviation lights showing. Its a satellite for sure. I'm wondering if it may even be the ISS.

Would have been a remarkable capture what with the scope being in my shed, with the lens caps on, and with the Dark filter selected just in case any stray light can get in past the lens cap.... :)

ChrisH

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