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What is the minimum size telescope required to enable clear visual detection of Ceres?

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Ceres varies between mag 9.3 and mag 6.7 which are below the nominal naked eye limiting magnitude of ~5. The gain in limiting magnitude for something like 10x50 binoculars (~4.5 magnitudes) would bring Ceres even at its faintest above the limiting magnitude of about 9.5.

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  • $\begingroup$ Can't up-vote yet, but thanks, I can have a go with the binoculars without having to upgrade to anything serious. $\endgroup$ – Neomada Feb 20 '15 at 23:00

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