Before revision: days 1 to 15 day 16 until the end of the month.Newly identified small Solar System bodies, such as comets and asteroids, are given systematic designations that contain the half-month encoded as a letter of the English alphabet.
After revision: 15 day 16 until the end of the month.Newly identified small Solar System bodies, such as comets and asteroids, are given systematic designations that contain the half-month encoded as a letter of the English alphabet.