If gravity is required, what are the planets in the SolarSystem?

http://www.spacedaily.com/news/outerplanets-04b.html

According to an article on SpaceDaily, planetary scientist S. Alan
Stern suggests that the deciding factor in deciding whether or not a
body is a planet should be gravity. If a body is rounded by its own
gravity, then it should be considered a planet.

If this were the rule that decides what is a planet, what would be the
planets in the Solar System? Mr. Stern mentions Pluto, Sedna and Ceres
along with several asteroids and large Kuiper Belt Objects. What would
the planet count be in the Solar System and what would be the total
list of planets?