2004 XP14

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2004 XP14
2004 XP14 seen on 3 July 2006
Discovered by LINEAR
Discovery date 10 December 2004
NEO · Apollo · PHA
Orbital characteristics[1]
Epoch 13 January 2016 (JD 2457400.5)
Uncertainty parameter 0
Observation arc 1007 days (2.76 yr)
Aphelion 1.21822 AU (182.243 Gm)
Perihelion 0.884900 AU (132.3792 Gm)
1.05156 AU (157.311 Gm)
Eccentricity 0.158488
1.08 yr (393.87 d)
0° 54m 50.45s /day
Inclination 32.9505°
Earth MOID 0.00316799 AU (473,925 km)
Physical characteristics
Mean diameter
260 m[2]
300–800 m[3]
100 h (4.2 d)[1]

2004 XP14 is a sub-kilometer asteroid, classified as a near-Earth object and potentially hazardous asteroid of the Apollo group. It was first observed by the LINEAR project on 10 December 2004.


Although initially there were concerns that it might possibly impact Earth later in the 21st century and thus merit special monitoring, further analysis of its orbit has since ruled out any such collision, at least in the foreseeable future.

The size of 2004 XP14 is not precisely known. Based on optical measurements, the object is between 300 and 800 meters in diameter.[1] Radar observations place a lower bound of about 260 meters (850 ft).[2]

2004 XP14's closest pass by Earth was above the west coast of North America at 04:25 UTC on 3 July 2006.[1]

The asteroid's distance from Earth's center of mass at that moment was 0.0028906 AU (432,430 km; 268,700 mi),[1] or just 1.1 times the Moon's 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[4] and amateurs.

It was removed from the Sentry Risk Table on 17 March 2005.[5]


  1. ^ a b c d e f "JPL Close-Approach Data: (2004 XP14)" (last observation: 2007-09-13; arc: 2.76 years). Retrieved 30 March 2016. 
  2. ^ a b Benner, Lance A.; Ostro; Giorgini; Busch; Rose; Jao; Jurgens (2006). "Radar Observations Of Asteroid 2004 XP14: An Outlier In The Near-earth Population". American Astronomical Society. 38 (2): 621. Bibcode:2006DPS....38.6807B. 
  3. ^ "Absolute Magnitude (H)". NASA/JPL. Retrieved 2011-09-27. 
  4. ^ "Asteroid fly-by eludes study". Nature. 442: 855. Bibcode:2006Natur.442..855L. doi:10.1038/442855a. Retrieved 2011-09-27. 
  5. ^ "Date/Time Removed". NASA/JPL Near-Earth Object Program Office. Retrieved 2012-03-19. 

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