Difference: LogBookAstronomyEntry0159 ( vs. 1)

Revision 116 Jan 2018 - JacobChambers

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Log Book Entry No.159

Days, Calendar Created: 16 Jan 2018 13:18:34 Days, Calendar Last Revised: 16 Jan 2018 13:18:34 Person JacobChambers Text PH3010 Solar Limb Darkening SB JC SH CM AS

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11am start

Setup unchanged from previous SLD

  • Camera firewire connected to main telescope with solar filters attached
  • Telescope turned on and GPS fix taken
  • dome doors opened and dome moved to locate position of sun
  • once shadow aligned with dome, position of telescope adjusted to align with sun by observing its shadow on dome wall
  • position then made more accurate by viewing sun through finder scope and adjusting to centre sun on cross-hairs
  • focus corrected by moving cross-hairs to edge of sun where the contrast gradient is greatest
  • manual focus by unlocking and rotating focus knob
  • exposure 1/5000s, gain 1023 ?
  • approx. tracking time made using speed 3 (~20s)
  • approx. tracking time then made in terrestrial mode (~2min15s)
  • ratio: 0.148
  • tracking back to astronomical and focussed back on edge of sun on speed 3, moved 20 seconds into background
  • set sequence timer up to 405 seconds (3 times the non-tracking width of the sun), start at same time as tracking stopped
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FORM FIELD Subject Subject PH3010 Solar Limb Darkening SB JC SH CM AS
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