(astronomy):⟨♇⟩ has only rarely seen formal use since the reclassification of Pluto as a dwarf planet in 2006. ⟨⯓⟩ has seen rare use for Pluto as a dwarf planet.
(astrology): Both ⟨♇⟩ and ⟨⯓⟩ are common. ⟨♇⟩ is universal, due to its early standardization in astronomy, but while astrological use of ⟨⯓⟩ is global, it is not the preferred symbol in many European countries. (See ⯓ for astrological synonyms.)
^ “Solar System Symbols”, in Solar System Exploration, NASA and the Planetary Institute, January 30, 2018, retrieved November 3, 2019: “The symbol for dwarf planet Pluto is a monogram made up of P and L in Pluto (and also the initials of Percival Lowell, who predicted its discovery).”