3360 Syrinx
3360 Syrinx is an Apollo and Mars crosser asteroid discovered in 1981. It approaches Earth to within 40 Gm three times in the 21st century: 33 Gm in 2039, 40 Gm in 2070, and 24 Gm in 2085.
On 2012-Sep-20 it passed from the Earth at apparent magnitude 17.0. In opposition on 23 November 2012, it brightened to magnitude 16.0.
It is a member of the Alinda group of asteroids with a 3:1 resonance with Jupiter that has excited the eccentricity of the orbit over the eons. As an Alinda asteroid it makes approaches to Jupiter, Earth, and Venus.
For a time, it was the lowest numbered asteroid that had not been named. Since November 2006, this distinction has been held by.
