(163348) 2002 NN4
(163348) 2002 NN4 (prov. designation: 2002 NN4) is a dark, sub-kilometer near-Earth object and potentially hazardous asteroid of the Aten group that flew by Earth on 6 June 2020. The highly elongated X-type asteroid has a rotation period of 14.5 hours and measures approximately 0.7 kilometers (0.4 miles) in diameter. It was discovered by LINEAR at the Lincoln Laboratory's Experimental Test Site in New Mexico on 9 July 2002.
2002 NN4 orbits between Venus and Mars | |
| Discovery | |
|---|---|
| Discovered by | LINEAR |
| Discovery site | Lincoln Lab's ETS |
| Discovery date | 9 July 2002 |
| Designations | |
MPC designation | (163348) 2002 NN4 |
Alternative designations | 2002 NN4 |
Minor planet category | NEO · PHA · Aten |
| Orbital characteristics | |
| Epoch 31 May 2020 (JD 2459000.5) | |
| Uncertainty parameter 0 · 2 | |
| Observation arc | 14.16 yr (5,171 d) |
| Aphelion | 1.2572 AU |
| Perihelion | 0.4956 AU |
Semi-major axis | 0.8764 AU |
| Eccentricity | 0.4345 |
Orbital period (sidereal) | 300 days |
Mean anomaly | 83.774° |
Mean motion | 1° 12m 4.68s / day |
| Inclination | 5.4177° |
Longitude of ascending node | 259.48° |
| 222.23° | |
| Earth MOID | 0.0069 AU (2.69 LD) |
| Physical characteristics | |
Mean diameter |
|
Synodic rotation period | 14.50±0.03 h |
| |
| X | |
| 20.1 | |
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