Lunar crater Atlas, 2012 December 30

I used here the same setup on the C-14 that I’ve been using for imaging Jupiter (as it is easier not to change it): the 3x Barlow and Flea 3. Seeing was not good. This is through an IR filter.

The crater Atlas is 87km in diameter, which makes the smallest craterlets in this image, and the width of the fractures on Atlas’s floor, about 1km or less.


Lunar crater Atlas, 2012 December 30 — 2 Comments

  1. Congrats for yr website and observation log.

    I have a question for you. What’s the usual orientation of your c14 ota when you finish and store the scope in your observatory. My concern is about the focussing and mirror bracketting system while not in use.

    Tnanks in advance.

    • The C-14 can only be parked in one position when the observatory is closed, which is with the tube horizontal, and the east side of the meridian, and pointing south, or slightly east of south. I actually often store it with the scope slightly lower than the counterweight, i.e. just east of south, if I drive it to the park position manually. If I drive it automatically, using ASCOM, it ends up on the meridian. Typically I always observe with the scope east of the mounting, as my eastern horizon is poor, so from about 3 hours east of the meridian, westwards. Therefore the scope does not move that much between observing and parking position, and I find I don’t have to re-collimate much. There is always a significant mirror shift and change of collimation as the scope goes over the meridian, though.

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