2004 XP14

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					2004 XP14
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                                    2004 XP 14 (also written 2004 XP14) is a                                      2004 XP14
                                    near-Earth asteroid, first discovered on
                                    December 10, 2004, by the LINEAR project.                                        Discovery
                                                                                                Discovered by                  LINEAR
                                 Due to the proximity of its orbit to Earth and
                                                                                                Discovery date                 December 10, 2004
                                 its estimated size, this object has been
                                 classified as a "Potentially Hazardous                                             Designations
                                 Asteroid" (PHA) by the Minor Planet Center                     Minor planet
  2004 XP14 on July 3, 2006                                                                                                    Apollo
                                                                                                category
                                 in Cambridge, Massachusetts. Although
                                 initially there were concerns that it might                                   Orbital characteristics
possibly impact Earth later in the 21st century and thus merit special                          Aphelion                       1.2238 AU
monitoring, further analysis of its orbit has since ruled out any such                          Perihelion                     0.8909 AU
                                                                                                Semi-major axis                1.05733 AU
collision, at least in the foreseeable future.
                                                                                                Eccentricity                   0.157407
The size of 2004 XP 14 is not precisely known. Based on optical                                 Orbital period                 397 d 3 h
measurements, the object is between 300 and 900 meters in diameter.                             Inclination                    32.9294°

2004 XP 14 's closest pass by Earth was above the west coast of North                                        Proper orbital elements
America at 04:25 UTC on July 3, 2006. [2]
                                                                                                             Physical characteristics
The asteroid's distance from Earth's center of mass at that moment was                          Dimensions                     300–900 m [1]
0.0028906 AU (432,430 km; 268,700 mi),[2] or just 1.1 times the Moon's       Absolute magnitude (H)    19.29
average distance from Earth. It was observed immediately after this close
approach by radar from three locations, from Goldstone in the Mojave Desert in the USA, from Sicily, and from Yevpatoria
RT-70 radio telescope, Ukraine, as well as optically from other observatories [3] and amateurs.
It was removed from the Sentry Risk Table on March 17, 2005. [4]

References
   1. ^ "Glossary: Absolute Magnitude (H)"         . Neo.jpl.nasa.gov. Retrieved 2011-09-27.
   2. ^ a b "JPL Close-Approach Data: (2004 XP14)" . 2007-09-13 last obs (arc=2.76 years). Retrieved 2011-11-12.
   3. ^ "Access : Asteroid fly-by eludes study" . Nature. Retrieved 2011-09-27.
   4. ^ "Date/Time Removed" . NASA/JPL Near-Earth Object Program Office. Retrieved 2012-03-19.

External links
      NASA's Asteroid Radar Group
      Orbital elements  for 2004 XP 14 from JPL
      Asteroid may pose danger to Earth
      Close pass by space rock
      Sormano Astronomical Observatory: Minor Body Priority List
      Minimum Orbital Intersection Distance
      Closest Approaches to the Earth by Minor Planets

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