Possible Clues:

• Henry Hudson's ship
• Either the MO or what's on the end in good shape
• Henry Furlong takes satellite from The Crescent
• Crescent
• Fraction low on tip of nose like Dumbledore's glasses?
• There's an M.O. in or on one satellite over two
• Anything semi-circular
• There's a semi-doctor on the shape of it
• It's seen in the middle of a quarter
• Earth's satellite at first (or last) quarter