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    carnevali's Avatar
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    Default DSOs visible under 90% full Moon



    Spent an hour under the Moon sky, with my 4.5" refractor. Warm air rising prevented detailed observations of the Moon and Jupiter, so I took a look around to check what DSOs would be visible in LP skies. M31 showed even in the finder scope at 8x, and decently at 30x in the telescope together with M32. Globular cluster M15 was "easy" to find (at 30x) although only 24 degrees away from the Moon, but it never showed well. Even at 180x it still looked small and unimpressive, a fuzzy little ball almost entirely unresolved. The ring nebula was also easy to find and see (finder scope and then 30x, again), but this one too did not show well: I could barely see its doughnut shape, mostly in averted vision, at about 100x; at higher powers it seemed to wash away. The dumbbell nebula I couldn't find at all, but then I've never been too good at finding it, I just go by intuition and tonight it didn't work. Then some double stars: beautiful views of Albireo, Almach, the double-double at 100x, Polaris, and the tight zeta Aquarii at 180x, all showed nicely. On the Moon I could barely discern two craterlets inside Plato but didn't manage a clear identification of the straight wall (Rupes Recta), otherwise typically easy. I tried Neptune and may have found it, but couldn't tell for sure: it was quite difficult because the Moon was really close by (5-10 degrees). Jupiter and moons and Uranus together in the same field of view, with a sprinkle of background stars around them, brought a nice close to the session. Both J & U fit in the FOV at 55x, but looked their best in a wider field (2" EP, 26mm and 38mm), at 35x and 25x.

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    Antonino Carnevali
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  3. #2
    andyp180's Avatar
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    Default

    antonino,
    nice report,thanks for posting.
    clear skies,
    andy

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    andy

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    Default

    Hi Antonino, nice report. You inspired me to try this tonight. Clear skies are predicted here.
    Balu.
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