Discovered by NEAT Alternative names 2002 CR46 Observation arc 9563 days (26.18 yr) Discovered 5 February 2002 Named after Typhon | Discovery date 5 February 2002 Adjectives Typhonean, Typhonian Orbital period 235 years Orbits Sun Moon Echidna | |
Minor planet category Scattered disc
Centaur
7:10 resonance Discoverer Near-Earth Asteroid Tracking Similar 58534 Logos, 65489 Ceto, 38083 Rhadamanthus, 19521 Chaos, Solar System | ||
42355 Typhon (/ˈtaɪfɒn/; from Greek: Τυφών) is a scattered disc object that was discovered on February 5, 2002, by the NEAT program. It measures 162±7 km in diameter, and is named after Typhon, a monster in Greek mythology.
A large moon was identified in 2006. It is named Echidna—formal designation (42355) Typhon I Echidna, /ᵻˈkɪdnə/, from Greek: Έχιδνα—after Echidna, the monstrous mate of Typhon. It orbits Typhon at ~1300 km, completing one orbit in about 11 days. Its diameter is estimated to be 89±6 km. Typhon is the first known binary centaur, using an extended definition of a centaur as an object on a non-resonant (unstable) orbit with the perihelion inside the orbit of Neptune.
References
42355 Typhon Wikipedia(Text) CC BY-SA