Planet
The smallest known planet is PSR B1257+12A, one of the first extrasolar planets discovered, which was found in 1992 in orbit around a pulsar. Its mass is roughly half that of the planet Mercury. The smallest known planet orbiting a main-sequence star other than the Sun is Kepler-37b, with a mass (and radius) slightly higher than that of the Moon.
List of slow rotators (minor planets)
This list contains the slowest-rotating minor planets with periods of at least 1000 hours, or 41 days. See "" for minor planets with an insufficiently accurate period—that is, a LCDB quality code of less than 2.