Possible retrograde
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by
scibuff
Possible retrograde motion between frames #3 and #4. The jump is much smaller than the distance typical artifacts move between #3 and #4 and probably not fast enough to trail. Furthermore, it does not appear to be "favorably" aligned hot pixels as FWHM appears similar to that of stellar objects with similar brightness (although impossible to be sure without measuring the PSF) and the edges are a litter dimmer than the center (just like stars/asteroids appear to have). It would be very useful to see the adjacent field for frames #1 and #2
Posted