| Minorplanet: | yes |
| Background: |
|
| (3360) Syrinx | |
| Discovered: | 4 November 1981 |
| Mpc Name: | (3360) Syrinx |
| Alt Names: | 1981 VA |
| Epoch: | 13 January 2016 (JD 2457400.5) |
| Semimajor: | 2.46697AU |
| Perihelion: | 0.62791AU |
| Aphelion: | 4.30603abbr=onNaNabbr=on |
| Eccentricity: | 0.74547 |
| Period: | 3.87 yr (1415.3 d) |
| Inclination: | 21.154° |
| Asc Node: | 242.561° |
| Arg Peri: | 63.457° |
| Dimensions: | 1.8 km |
| Abs Magnitude: | 15.9 |
| Albedo: | 0.17 |
| Mean Motion: | / day |
| Observation Arc: | 12556 days (34.38 yr) |
| Uncertainty: | 0 |
| Moid: | 0.107877AU |
3360 Syrinx (originally designated 1981 VA) 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 20 September 2012, it closely encountered Earth at a distance of 0.4192abbr=onNaNabbr=on, peaking in brightness at an apparent magnitude of 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. In November 2006, this distinction passed to 3708 Socus, and in May 2021 to (4596) 1981 QB.