One of Phaethon 's most remarkable distinctions is that it approaches the Sun closer than any other numbered asteroid ; its perihelion is only 0.140 AU -- less than half Mercury 's perihelion distance .
Phaethon approaches the Sun closer than any other numbered asteroid . Its perihelion -LRB- closest approach to the Sun -RRB- is only 0.140 AU -- less than half Mercury 's perihelion distance .
Phaethon approaches the Sun closer than any other numbered asteroid . Its perihelion -LRB- closest approach to the Sun -RRB- is only 0.140 AU -- less than half Mercury 's perihelion distance .
Simplify this text: One of Phaethon 's most remarkable distinctions is that it approaches the Sun closer than any other numbered asteroid ; its perihelion is only 0.140 AU -- less than half Mercury 's perihelion distance . Output: