Ripening roundness, sturdy moonbeam
Inscrutable and delicate
Sixteenth of our House,
First daughter to brave atmosphere
Hidden yet surely coming
Unknown yet foreknown
We unwrap your layers, a gift long awaited.
Errata: The puzzle had an error mapping the last letter of clue K to 246 instead of 245. It is corrected below. Also, the answer for clue D uses an accepted spelling, but one that I have recently discovered...