Log Book Entry No.59

Created: 08 Dec 2014 18:54:23

Last Revised: 09 Dec 2014 13:27:05

SimonWoeginger

8/12/2014 SW/LN Observations

8th December Observatins

Start time 18:00

Conditions: Varied from good and clear to a little hazy which had an effect on exposures.

Observations:

Deneb (alpha cyg):

Used for alignment and tracking purposes

Magnitude - 1.25

CCD cooler hadn't been running long so visible ring present.

M39 open cluster:

Magnitude - 4.60

Worked with Focuser Max to explore the effects of being out of focus. Varied focus by +-5000 of origional position to see effects of being too out of focus (stars take on donut like shape). Fine tuning steps of 500 were taken in and out of focus to produce a sharper image. Took multiple exposures (attatched to this post).

Observation showing out of focus and in focus m39 are attatched to this log.

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• m39_15s_exposure:
  

• 20141208_SW_LN.zip: 20141208_SW_LN.zip