(153814) 2001 WN5
 Nominal orbit of 2001 WN5 passing the Earth–Moon system in June 2028. Earth is the blue dot, the Moon's orbit is gray, and 2001 WN5 is green. | |
| Discovery[1] | |
|---|---|
| Discovered by | LONEOS Project (699) |
| Discovery date | 2001-Nov-20 |
| Designations | |
| MPC designation | (153814) 2001 WN5 |
| Minor planet category |
Apollo NEO, PHA[1] |
| Orbital characteristics[1] | |
|
Epoch 2011-Aug-27 (Uncertainty=0)[1] | |
| Aphelion | 2.5112 AU (Q) |
| Perihelion | 0.91227 AU (q) |
| Semi-major axis | 1.711 AU (a) |
| Eccentricity | 0.46705 |
| Orbital period | 2.24 yr |
| Mean anomaly | 158.24° (M) |
| Inclination | 1.9216° |
| Longitude of ascending node | 277.64° |
| Argument of perihelion | 44.392° |
| Physical characteristics | |
| Dimensions | 700–1,500 m[2] |
| Absolute magnitude (H) | 18.2[1] |
|
| |
(153814) 2001 WN5 is a near-Earth Asteroid belonging to the Apollo family.[1] It was first discovered by the LONEOS Project at Anderson Mesa on November 20, 2001,[1] and was later classified as a Potentially Hazardous Asteroid (PHA). It was removed from the Sentry Risk Table on January 30, 2002.[3] There are precovery images dating back to February 10, 1996.[1] The orbit is well determined with an observation arc of 14.9 years using two radar delay observations, and has an Uncertainty Parameter of 0.[1] The asteroid will pass within 250,000 km (0.65 lunar distances) from the Earth on June 26, 2028.[4] During the close approach, the asteroid should peak at about apparent magnitude 6.7,[5] and will be visible in binoculars. It has an absolute magnitude (H) of 18.2.[1] Depending on its characteristics and albedo, it is estimated to be 700 to 1,500 meters in diameter.[2]
References
- ↑ 1.0 1.1 1.2 1.3 1.4 1.5 1.6 1.7 1.8 1.9 "JPL Small-Body Database Browser: 153814 (2001 WN5)". Jet Propulsion Laboratory. 2011-01-04 last obs (arc=14.9 years). Retrieved 2011-10-16.
- ↑ 2.0 2.1 "Absolute Magnitude (H)". NASA/JPL. Archived from the original on 1 September 2008. Retrieved 2008-08-30.
- ↑ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2011-10-16.
- ↑ "JPL Close-Approach Data: 153814 (2001 WN5)". 2011-01-04 last obs (arc=14.9 years). Retrieved 2011-10-16.
- ↑ "2001WN5 Ephemerides for 26 Jun 2028". NEODyS (Near Earth Objects - Dynamic Site). Retrieved 2011-10-16.
External links
- Orbital simulation from JPL (Java) / Horizons Ephemeris
| Preceded by 2005 YU55 |
Large NEO Earth close approach (inside the orbit of the moon) 26 June 2028 |
Succeeded by 99942 Apophis |