SC-4C not picking up star when tracking

Discussion in 'Guiding and Adaptive Optics - StarChaser and AO' started by Michael Rodruck, Aug 30, 2025.

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  1. Colin Haig

    Colin Haig Staff Member

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    Confirmed shutter is not sticking. What was the ambient temperature at the start and end?
     
    Colin Haig, Oct 16, 2025
    #21
  2. Doug

    Doug Staff Member

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    The dark current in silicon sensors doubles every 4-6 degrees C. The temperature can easily drop by double that overnight.

    It is always recommended to periodically take new guider darks through the night. That's why the SC-4C has a shutter!

    The alternating lights and darks look good. There's a moderate amount of vignetting, which is not unusual for an off-axis guide camera.
     
    Doug, Oct 16, 2025
    #22
  3. Michael Rodruck

    Michael Rodruck Cyanogen Customer

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    I had not thought about that, thanks! I don't have the temperature, but it likely dropped by 5 - 10 degrees F. We'll re-take our darks later in the night.
     
    Michael Rodruck, Oct 19, 2025
    #23
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