Log Book Entry No.143

Days, Calendar Created: 20 Mar 2017 19:32:16 Days, Calendar Last Revised: 20 Mar 2017 23:28:28 Person LaurieNevay Text H-Alpha 2

H-Alpha Observation 2

  • JC, LN, LW, ZCW

  • Seeing quite good. Few intermittent clouds, but clearing up.
  • Coolers on around 3pm and biases and darks taken. 60 biases, 7 darks at 20mins
  • Aligned to Sirius at 7pm
* nova.astrometry.net/user_images/1545205#annotated

  • Bright star in field of view on main scope - Alnitak

  • Pixel coods 573,384
  • Agressiveness 8,4
  • touched up focus
  • 1st try at 600s with h alpha at 7:32
  • 10minute exposure quite clear but alnitak just about saturated
  • 20 minutes exposure clearer nebulosity but not excessive distortion on alnitak
  • settled on 10 minute exposures as we have some already
  • auto save for 15 (can cancel)
  • did 9 exposures at 10 min, so 11 in total with earlier ones

  • 50 flats on smaller scope with electro-luminescent panel - 6s each
  • Dome shut and cameras warmed up at 11:25

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Subject H-Alpha 2
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Topic revision: r3 - 20 Mar 2017 - LaurieNevay

 
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