Why is there a black blob/circle in DSS images?
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by Zooniverse99
on frame 3 there is a black line with a blob on the end of it. As it does not go right across the page am I correct in thinking this would not be a trail?
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by TED91 moderator
This is most likely dust on the original photographic plate. More here: http://talk.diskdetective.org/#/boards/BWI0000002/discussions/DWI00000ot
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by Zooniverse99
Thank you
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by marckuchner scientist, admin
@TED91 is right! Asteroid trails will show up as positive (white,blue) signal (not black).
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