How large does a celestial body have to be to be classed as a planet? How large does a celestial body have to be to be

Question: How large does a celestial body have to be to be classed as a planet? How large does a celestial body have to be to be classed as a dwarf planet?
- Keywords:
  celestial,
  planet
Asked by megan99raff to Alessandro, Angela, Claudia, Marina, Phil on 15 Mar 2013.
- Marina De Vos answered on 15 Mar 2013:
  
  The definition of a planet was revised in 2006. According to NASA a celestial body is a planet when
  Is in orbit around a star, but is not itself a satellite*
  Has sufficient mass so it is nearly spherical in shape*
  Has cleared the neighborhood around its orbit*
  
  So NASA did not specify an exact number.

Question: How large does a celestial body have to be to be classed as a planet? How large does a celestial body have to be to be classed as a dwarf planet?