List of asteroid close approaches to Earth in 2011

Below is the list of asteroid close approaches to Earth in 2011.

Timeline of close approaches less than one lunar distance from Earth in 2011

A list of known near-Earth asteroid close approaches less than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2011.[note 1]

Date of
closest
approach		ObjectNominal geocentric
distance (AU)[note 2]		Size (m)
(approximate)
[note 3]		(H)Closer
approach
to Moon
2011-01-112011 AM370.00086 AU (129,000 km; 80,000 mi)629.7[1]
2011-01-172011 AN520.00213 AU (319,000 km; 198,000 mi)1128.6[2]Yes
2011-01-202011 BY100.00238 AU (356,000 km; 221,000 mi)2227.1[3]Yes
2011-01-252011 BW110.00086 AU (129,000 km; 80,000 mi)1328.3[4]
2011-01-312011 CA40.00165 AU (247,000 km; 153,000 mi)2227.1[5]
2011-02-042011 CQ10.000079 AU (11,800 km; 7,300 mi)132.1[6]
2011-02-062011 CF220.00026 AU (39,000 km; 24,000 mi)330.9[7]
2011-02-092011 CA70.00069 AU (103,000 km; 64,000 mi)530.3[8]
2011-02-232011 DU90.00192 AU (287,000 km; 178,000 mi)2726.7[9]
2011-03-032011 EN110.00166 AU (248,000 km; 154,000 mi)1527.9[10]
2011-03-072011 EY110.000876 AU (131,000 km; 81,400 mi)1128.5[11]
2011-03-082011 EM400.00161 AU (241,000 km; 150,000 mi)1428.0[12]
2011-04-062011 GW90.00132 AU (197,000 km; 123,000 mi)1428.1[13]
2011-04-062011 GP280.00063 AU (94,000 km; 59,000 mi)729.4[14]
2011-05-052011 JV100.00231 AU (346,000 km; 215,000 mi)629.7[15]Yes
2011-06-022009 BD0.00231325 AU (346,057 km; 215,030 mi)1428.1[16]
2011-06-272011 MD0.00012467 AU (18,650 km; 11,589 mi)1428.0[17]
2011-07-242011 PU10.00224 AU (335,000 km; 208,000 mi)6025.0[18]Yes
2011-07-282011 OD180.00115 AU (172,000 km; 107,000 mi)3026.5[19]
2011-09-272011 SE580.00158 AU (236,000 km; 147,000 mi)1627.8[20]
2011-09-282011 TO0.00086 AU (129,000 km; 80,000 mi)3026.3[21]
2011-09-302011 SM1730.00194 AU (290,000 km; 180,000 mi)1627.8[22]
2011-10-122011 UT0.0015 AU (220,000 km; 140,000 mi)3726.0[23]Yes
2011-10-262011 UL1690.00177 AU (265,000 km; 165,000 mi)1328.3[24]
2011-10-282011 UX2550.00092 AU (138,000 km; 86,000 mi)1927.4[25]
2011-11-08(308635) 2005 YU550.00217202 AU (324,930 km; 201,902 mi)36021.9[26]Yes
2011-12-032011 XC20.00232 AU (347,000 km; 216,000 mi)10023.1[27]Yes
2011-12-282011 YC400.00071 AU (106,000 km; 66,000 mi)629.7[28]
2011-12-292012 AQ0.00179 AU (268,000 km; 166,000 mi)430.7[29]
2011-12-302011 YC630.00161 AU (241,000 km; 150,000 mi)929.0[30]

See also

Notes
  1. For a list of current Earth close approaches see NEO Earth Close Approaches
  2. Distance from the center of Earth to the center of the object. See the NASA/JPL Solar System Dynamics Glossary: Geocentric. Earth has a radius of approximately 6,400 km.
  3. For asteroids without a well determined size an albedo of 0.05 is assumed. An albedo of 0.05 establishes an approximate upper limit to the size of the asteroid.

References
  1. "JPL Small-Body Database Browser: (2011 AM37)" (2011-01-14 last obs).
  2. "JPL Small-Body Database Browser: (2011 AN52)" (2011-01-17 last obs).
  3. "JPL Small-Body Database Browser: (2011 BY10)" (2011-01-30 last obs).
  4. "JPL Small-Body Database Browser: (2011 BW11)" (2011-01-28 last obs).
  5. "JPL Small-Body Database Browser: (2011 CA4)" (2011-02-10 last obs).
  6. "JPL Small-Body Database Browser: (2011 CQ1)" (2011-02-04 last obs).
  7. "JPL Small-Body Database Browser: (2011 CF22)" (2011-02-07 last obs).
  8. "JPL Small-Body Database Browser: (2011 CA7)" (2011-02-08 last obs).
  9. "JPL Small-Body Database Browser: (2011 DU9)" (2011-03-11 last obs).
  10. "JPL Small-Body Database Browser: (2011 EN11)" (2011-03-05 last obs).
  11. "JPL Small-Body Database Browser: (2011 EY11)" (2011-03-07 last obs).
  12. "JPL Small-Body Database Browser: (2011 EM40)" (2011-03-14 last obs).
  13. "JPL Small-Body Database Browser: (2011 GW9)" (2011-04-05 last obs).
  14. "JPL Small-Body Database Browser: (2011 GP28)" (2011-04-05 last obs).
  15. "JPL Small-Body Database Browser: (2011 JV10)" (2011-05-10 last obs).
  16. "JPL Small-Body Database Browser: (2009 BD)" (2011-06-20 last obs (arc=2.4 yr)).
  17. "JPL Small-Body Database Browser: (2011 MD)" (2011-07-03 last obs (arc=12 days)).
  18. "JPL Small-Body Database Browser: (2011 PU1)" (2011-09-21 last obs (arc=46 days)).
  19. "JPL Small-Body Database Browser: (2011 OD18)" (2011-08-08 last obs).
  20. "JPL Small-Body Database Browser: (2011 SE58)" (2011-09-27 last obs).
  21. "JPL Small-Body Database Browser: (2011 TO)" (2013-01-12 last obs (arc=1.28 yr)).
  22. "JPL Small-Body Database Browser: (2011 SM173)" (2011-09-30 last obs).
  23. "JPL Small-Body Database Browser: (2011 UT)" (2011-11-24 last obs (arc=38 days)).
  24. "JPL Small-Body Database Browser: (2011 UL169)" (2011-10-31 last obs).
  25. "JPL Small-Body Database Browser: (2011 UX255)" (2011-11-01 last obs).
  26. "JPL Small-Body Database Browser: (2005 YU55)" (2011-12-16 last obs).
  27. "JPL Small-Body Database Browser: (2011 XC2)" (2011-12-30 last obs (arc=22 days)).
  28. "JPL Small-Body Database Browser: (2011 YC40)" (2011-12-30 last obs).
  29. "JPL Small-Body Database Browser: (2012 AQ)" (2012-01-03 last obs).
  30. "JPL Small-Body Database Browser: (2011 YC63)" (2012-01-01 last obs).
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