List of asteroid close approaches to Earth in 2011

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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[edit]

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[edit]

Notes[edit]

  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[edit]

  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).