Science, it seems, can quantify anything:

“…on the subject of art and beauty, I must mention Asimov’s suggestion… of a unit for quantifying the measurement of beauty: “the millihelen.”
If the beauty of Helen of Troy was sufficient to launch a thousand ships, then one millihelen would be beauty sufficient to launch a single ship.“

[From here, via Wired.]

Taking things to their logical conclusion, one supposes a microhelen would be the beauty sufficient to launch a single sailor… perhaps in a rubber dingy…