Observation by Derek Robson: Asteroid Florence
Uploaded by
Derek Robson
Observer
Derek Robson
Observed
2017 Sep 02 - 23:00
Uploaded
2018 Sep 22 - 16:59
Planetarium overlay
Constellation
Delphinus
Field centre
RA: 20h44m
Dec: +15°53'
Position angle: +22°37'
Field size
0°45' × 0°56'
Equipment
- Canon 1100d/Tamron 70-300 mm lens
Location
Loughborough
Target name
Florence
Title
Asteroid Florence
About this image
Stack of 36 exposures, and final crop of stack, inverted to negative. Direction of motion of Florence shown by red arrow.
Files associated with this observation
Like this image
Comments
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?
Grant. I need to look up the conditions used.
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.
Copyright of all images and other observations submitted to the BAA remains with the owner of the work.
Reproduction of work by third parties is expressly forbidden without the consent of the copyright
holder. By submitting images to this online gallery, you grant the BAA permission to reproduce them in any
of our publications.