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Asteroid Florence


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About this observation
Derek Robson
Time of observation
03/09/2017 - 00:00
Observing location
Canon 1100d/Tamron 70-300 mm lens
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Stack of 36 exposures, and final crop of stack, inverted to negative. Direction of motion of Florence shown by red arrow.


Derek Robson's picture


Grant Privett's picture

Were there any missed exposures or are the gaps in the trail due to real brightness variations? How long are the exposures and are they all evenly spaced?

Derek Robson's picture

Grant. I need to look up the conditions used.

Derek Robson's picture

Gaps are not due to change in brightness, but rather, due to deliberately taking longer exposures (3.2-20s) at certain times in the period and also frames which had drifted too far outside the target area (undriven mount, just a tripod); both were excluded from the stack.

Exposure 2s, f5.6, ISO 6400.  Not all evenly spaced, but most were aimed at every 1 min.

Period 1hr 8m.  00:41-01:49hr 3/9/17.  Total images taken 49. 36 used to stack.  5 darks taken.

Focused on Altair for lens focus prior to use.

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