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 		Object Nominal geocentric
distance (AU)[note 2] 		Size (m)
(approximate)
[note 3] 		(H) Closer
approach
to Moon
2011-01-11 2011 AM37 0.00086 AU (129,000 km; 80,000 mi) 6 29.7[1]
2011-01-17 2011 AN52 0.00213 AU (319,000 km; 198,000 mi) 11 28.6[2] Yes
2011-01-20 2011 BY10 0.00238 AU (356,000 km; 221,000 mi) 22 27.1[3] Yes
2011-01-25 2011 BW11 0.00086 AU (129,000 km; 80,000 mi) 13 28.3[4]
2011-01-31 2011 CA4 0.00165 AU (247,000 km; 153,000 mi) 22 27.1[5]
2011-02-04 2011 CQ1 0.000079 AU (11,800 km; 7,300 mi) 1 32.1[6]
2011-02-06 2011 CF22 0.00026 AU (39,000 km; 24,000 mi) 3 30.9[7]
2011-02-09 2011 CA7 0.00069 AU (103,000 km; 64,000 mi) 5 30.3[8]
2011-02-23 2011 DU9 0.00192 AU (287,000 km; 178,000 mi) 27 26.7[9]
2011-03-03 2011 EN11 0.00166 AU (248,000 km; 154,000 mi) 15 27.9[10]
2011-03-07 2011 EY11 0.000876 AU (131,000 km; 81,400 mi) 11 28.5[11]
2011-03-08 2011 EM40 0.00161 AU (241,000 km; 150,000 mi) 14 28.0[12]
2011-04-06 2011 GW9 0.00132 AU (197,000 km; 123,000 mi) 14 28.1[13]
2011-04-06 2011 GP28 0.00063 AU (94,000 km; 59,000 mi) 7 29.4[14]
2011-05-05 2011 JV10 0.00231 AU (346,000 km; 215,000 mi) 6 29.7[15] Yes
2011-06-02 2009 BD 0.00231325 AU (346,057 km; 215,030 mi) 14 28.1[16]
2011-06-27 2011 MD 0.00012467 AU (18,650 km; 11,589 mi) 14 28.0[17]
2011-07-24 2011 PU1 0.00224 AU (335,000 km; 208,000 mi) 60 25.0[18] Yes
2011-07-28 2011 OD18 0.00115 AU (172,000 km; 107,000 mi) 30 26.5[19]
2011-09-27 2011 SE58 0.00158 AU (236,000 km; 147,000 mi) 16 27.8[20]
2011-09-28 2011 TO 0.00086 AU (129,000 km; 80,000 mi) 30 26.3[21]
2011-09-30 2011 SM173 0.00194 AU (290,000 km; 180,000 mi) 16 27.8[22]
2011-10-12 2011 UT 0.0015 AU (220,000 km; 140,000 mi) 37 26.0[23] Yes
2011-10-26 2011 UL169 0.00177 AU (265,000 km; 165,000 mi) 13 28.3[24]
2011-10-28 2011 UX255 0.00092 AU (138,000 km; 86,000 mi) 19 27.4[25]
2011-11-08 (308635) 2005 YU55 0.00217202 AU (324,930 km; 201,902 mi) 360 21.9[26] Yes
2011-12-03 2011 XC2 0.00232 AU (347,000 km; 216,000 mi) 100 23.1[27] Yes
2011-12-28 2011 YC40 0.00071 AU (106,000 km; 66,000 mi) 6 29.7[28]
2011-12-29 2012 AQ 0.00179 AU (268,000 km; 166,000 mi) 4 30.7[29]
2011-12-30 2011 YC63 0.00161 AU (241,000 km; 150,000 mi) 9 29.0[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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