META TOPICPARENT |
name="LogBookAstronomy" |
Log Book Entry No.159
Created: 16 Jan 2018 13:18:34 |
Last Revised: 16 Jan 2018 13:18:34 |
JacobChambers |
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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META FORM |
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FORM FIELD Subject |
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PH3010 Solar Limb Darkening SB JC SH CM AS |
FORM FIELD Status |
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FORM FIELD Author |
Author |
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META FILEATTACHMENT |
attachment="20180116_sld.zip" attr="" comment="" date="1516107708" name="20180116_sld.zip" path="20180116_sld.zip" size="80191908" user="zbvd104" version="1" |
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