List of asteroid close approaches to Earth in 2021

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Time of discovery of asteroids which came closer to Earth than the Moon in 2021
After closest approach: 40 (38.5%)< 24 hours before: 27 (26.0%)up to 7 days before: 37 (35.6%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)
  •   After closest approach: 40 (38.5%)
  •   < 24 hours before: 27 (26.0%)
  •   up to 7 days before: 37 (35.6%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 0 (0.0%)
Asteroid discoverers by count
Mount Lemmon Survey (G96): 28 (27.2%)Pan-STARRS 1 (F51): 19 (18.4%)Tokyo-Kiso (381): 10 (9.7%)Zwicky Transient Facility (I41): 10 (9.7%)Catalina Sky Survey (703): 8 (7.8%)ATLAS-HKO (T05): 8 (7.8%)ATLAS-MLO (T08): 7 (6.8%)MAP, San Pedro de Atacama (W94): 4 (3.9%)GINOP-KHK (K88): 3 (2.9%)Golden Ears Observatory (U55): 2 (1.9%)Kitt Peak - Bok (V00): 2 (1.9%)Calar Alto-Schmidt (Z84): 1 (1.0%)SONEAR (Y00): 1 (1.0%)
  •   Mount Lemmon Survey (G96): 28 (27.2%)
  •   Pan-STARRS 1 (F51): 19 (18.4%)
  •   Tokyo-Kiso (381): 10 (9.7%)
  •   Zwicky Transient Facility (I41): 10 (9.7%)
  •   Catalina Sky Survey (703): 8 (7.8%)
  •   ATLAS-HKO (T05): 8 (7.8%)
  •   ATLAS-MLO (T08): 7 (6.8%)
  •   MAP, San Pedro de Atacama (W94): 4 (3.9%)
  •   GINOP-KHK (K88): 3 (2.9%)
  •   Golden Ears Observatory (U55): 2 (1.9%)
  •   Kitt Peak - Bok (V00): 2 (1.9%)
  •   Calar Alto-Schmidt (Z84): 1 (1.0%)
  •   SONEAR (Y00): 1 (1.0%)

Below is the list of asteroids that have come close to Earth in 2021.

Timeline of known close approaches less than one lunar distance from Earth

A list of known near-Earth asteroid close approaches less than 1 lunar distance (0.0025696 AU (384,410 km; 238,860 mi)) from Earth in 2021.[1]

For reference, the radius of Earth is about 0.0000426 AU (6,370 km; 3,960 mi) or 0.0166 lunar distances. Geosynchronous satellites have an orbit with semi-major axis length of 0.000282 AU (42,200 km; 26,200 mi) or 0.110 lunar distances.

  Rows highlighted red indicate objects which were not discovered until after closest approach

  Rows highlighted yellow indicate objects discovered less than 24 hours before closest approach

  Rows highlighted green indicate objects discovered more than one week before closest approach

  Rows highlighted turquoise indicate objects discovered more than 7 weeks before closest approach

  Rows highlighted blue indicate objects discovered more than one year before closest approach (i.e.
objects successfully cataloged on a previous orbit, rather than being detected during final approach)

Date of
closest
approach 		Date
discovered 		Object Nominal geocentric distance[note 1] Approx.
size (m) 		(H)
(abs. mag) 		Closer
approach
to Moon
[note 2] 		References[1]
JPL[2] · MPC[3]
(AU) (Lunar
distance)
[note 3]
2021-01-01 2021-01-01 2021 AA 0.001586 AU (237,300 km; 147,400 mi) 0.62 11–24 26.9 — JPL[4] · MPC[5]
2021-01-03 2021-01-03 2021 AH 0.000333 AU (49,800 km; 31,000 mi) 0.13 5.4–12 28.5 — JPL[6] · MPC[7]
2021-01-04 2021-01-05 2021 AH8 0.000354 AU (53,000 km; 32,900 mi) 0.14 3.2–7.3 29.6 — JPL[8] · MPC[9]
2021-01-09 2021-01-08 2021 AS2 0.000717 AU (107,300 km; 66,600 mi) 0.28 3.3–7.5 29.5 — JPL[10] · MPC[11]
2021-01-16 2021-01-18 2021 BR2 0.000492 AU (73,600 km; 45,700 mi) 0.16 1.8–4.1 30.8 — JPL[12] · MPC[13]
2021-01-18 2021-01-17 2021 BK 0.000751 AU (112,300 km; 69,800 mi) 0.29 2.3–5.2 30.3 — JPL[14] · MPC[15]
2021-01-18 2021-01-17 2021 BV1 0.001606 AU (240,300 km; 149,300 mi) 0.62 6.6–15 28.0 — JPL[16] · MPC[17]
2021-01-18 2021-01-17 2021 BO 0.000160 AU (23,900 km; 14,900 mi) 0.062 0.68–1.5 33.0 — JPL[18] · MPC[19]
2021-01-20 2021-01-18 2021 BO1 0.001678 AU (251,000 km; 156,000 mi) 0.65 3.8–8.6 29.2 — JPL[20] · MPC[21]
2021-02-04 2021-02-02 2021 CV 0.001349 AU (201,800 km; 125,400 mi) 0.52 4.4–9.9 28.9 — JPL[22] · MPC[23]
2021-02-09 2021-02-09 2021 CZ3 0.000152 AU (22,700 km; 14,100 mi) 0.059 1.7–3.9 30.9 — JPL[24] · MPC[25]
2021-02-11 2021-02-05 2021 CO 0.002419 AU (361,900 km; 224,900 mi) 0.94 24–53 25.3 — JPL[26] · MPC[27]
2021-02-11 2021-02-11 2021 CQ5 0.001186 AU (177,400 km; 110,200 mi) 0.46 5.2–12 28.5 — JPL[28] · MPC[29]
2021-02-12 2021-02-11 2021 CC6 0.001128 AU (168,700 km; 104,900 mi) 0.44 2.5–5.6 30.1 — JPL[30] · MPC[31]
2021-02-12 2021-02-12 2021 CC7 0.002169 AU (324,500 km; 201,600 mi) 0.84 3.0–6.7 29.7 — JPL[32] · MPC[33]
2021-02-13 2021-02-10 2021 CA6 0.001107 AU (165,600 km; 102,900 mi) 0.43 5.5–12 28.4 — JPL[34] · MPC[35]
2021-02-14 2021-02-12 2021 CS6 0.001003 AU (150,000 km; 93,200 mi) 0.43 7.3–16 27.8 — JPL[36] · MPC[37]
2021-02-14 2021-02-13 2021 CW7 0.000187 AU (28,000 km; 17,400 mi) 0.073 1.5–3.4 31.2 — JPL[38] · MPC[39]
2021-02-18 2021-02-18 2021 DN1 0.002256 AU (337,500 km; 209,700 mi) 0.88 6.3–14 28.1 — JPL[40] · MPC[41]
2021-02-18 2021-02-17 2021 DG 0.001109 AU (165,900 km; 103,100 mi) 0.43 2.2–4.9 30.4 — JPL[42] · MPC[43]
2021-02-21 2021-02-22 2021 DA2 0.001317 AU (197,000 km; 122,400 mi) 0.51 3.9–8.8 29.2 — JPL[44] · MPC[45]
2021-03-01 2021-03-02 ZTF0KfF 0.00187 AU (280,000 km; 174,000 mi) 0.73[note 4] 0.96–5.9 31.0 ? NEOCP[46]
2021-03-02 2021-03-01 2021 EA 0.000627 AU (93,800 km; 58,300 mi) 0.24 6.7–15 28.0 — JPL[47] · MPC[48]
2021-03-07 2021-03-06 C4YK182 0.000632 AU (94,500 km; 58,700 mi) 0.25[note 5] 1.8–5.9 30.3 — NEOCP[49]
2021-03-08 2021-03-06 2021 EF1 0.001874 AU (280,300 km; 174,200 mi) 0.73 3.1–6.9 29.7 ✓ JPL[50] · MPC[51]
2021-03-09 2021-03-10 2021 EG3 0.000981 AU (146,800 km; 91,200 mi) 0.38 3.8–8.4 29.2 — JPL[52] · MPC[53]
2021-03-10 2021-03-11 ScKo07a 0.0013 AU (190,000 km; 120,000 mi) 0.51[note 6] 0.97–5.9 31.0 — NEOCP[54]
2021-03-15 2021-03-15 2021 EN4 0.000473 AU (70,800 km; 44,000 mi) 0.18 3.1–6.9 29.7 — JPL[55] · MPC[56]
2021-03-15 2021-03-15 2021 EP4 0.002483 AU (371,500 km; 230,800 mi) 0.97 3.6–8.1 29.3 — JPL[57] · MPC[58]
2021-03-16 2021-03-11 2021 EQ3 0.001860 AU (278,300 km; 172,900 mi) 0.72 16–36 26.1 ✓ JPL[59] · MPC[60]
2021-03-20 2021-03-21 2021 FM2 0.000559 AU (83,600 km; 52,000 mi) 0.22 2.5–5.7 26.1 — JPL[61] · MPC[62]
2021-03-21 2021-03-16 2021 FF2 0.002129 AU (318,500 km; 197,900 mi) 0.83 6.4–14 30.1 — JPL[63] · MPC[64]
2021-03-23 2021-03-23 B03SK22 0.00019 AU (28,000 km; 18,000 mi) 0.074[note 7] 0.38–2.4 33.0 — NEOCP[65]
2021-03-23 2021-03-20 2021 FO1 0.002148 AU (321,300 km; 199,700 mi) 0.84 3.4–7.6 29.5 — JPL[66] · MPC[67]
2021-03-23 2021-03-18 2021 FH 0.001572 AU (235,200 km; 146,100 mi) 0.61 12–28 26.7 — JPL[68] · MPC[69]
2021-03-23 2021-03-22 2021 FP2 0.002162 AU (323,400 km; 201,000 mi) 0.84 2.5–5.7 30.1 — JPL[70] · MPC[71]
2021-04-01 2021-04-01 A10w8qG 0.00149 AU (223,000 km; 139,000 mi) 0.58[note 8] 3.2–12 28.9 ✓ NEOCP[72]
2021-04-03 2021-04-04 2021 GE2 0.001604 AU (240,000 km; 149,100 mi) 0.62 4.2–9.3 29.0 — JPL[73] · MPC[74]
2021-04-03 2021-04-06 P11ekJ0 0.00188 AU (281,000 km; 175,000 mi) 0.73[note 9] 2.9–18 28.6 — NEOCP[75]
2021-04-04 2021-04-03 2021 GV 0.002242 AU (335,400 km; 208,400 mi) 0.87 3.8–8.4 29.2 — JPL[76] · MPC[77]
2021-04-05 2021-04-03 2021 GS 0.001669 AU (249,700 km; 155,100 mi) 0.65 4.9–11 28.7 — JPL[78] · MPC[79]
2021-04-05 2021-04-05 2021 GZ7 0.001264 AU (189,100 km; 117,500 mi) 0.49 4.4–9.8 28.9 ✓ JPL[80] · MPC[81]
2021-04-06 2021-04-07 P11eyxx 0.00024 AU (36,000 km; 22,000 mi) 0.093[note 10] 1.4–5.4 30.7 — NEOCP[82]
2021-04-08 2021-04-07 A10wiOp 0.00224 AU (335,000 km; 208,000 mi) 0.87[note 11] 2.8–17 28.7 — NEOCP[83]
2021-04-08 2021-04-08 2021 GV4 0.002117 AU (316,700 km; 196,800 mi) 0.82 4.3–9.6 29.0 — JPL[84] · MPC[85]
2021-04-09 2021-04-11 2021 GL16 0.002464 AU (368,600 km; 229,000 mi) 0.96 15–34 26.2 ✓ JPL[86] · MPC[87]
2021-04-10 2021-04-06 2021 GT3 0.001710 AU (255,800 km; 159,000 mi) 0.67 15–33 26.3 — JPL[88] · MPC[89]
2021-04-10 2021-04-10 TMG0042 0.00220 AU (329,000 km; 205,000 mi) 0.85[note 12] 4.4–14.3 28.4 — NEOCP[90]
2021-04-11 2021-04-10 2021 GQ5 0.002485 AU (371,800 km; 231,000 mi) 0.97 5.0–11 28.6 — JPL[91] · MPC[92]
2021-04-11 2021-04-11 TMG0044 0.00126 AU (188,000 km; 117,000 mi) 0.49[note 13] 2.5–9.9 29.4 — NEOCP[93]
2021-04-11 2021-04-07 P11exfR 0.00244 AU (365,000 km; 227,000 mi) 0.95[note 14] 3.1–19 28.5 — NEOCP[94]
2021-04-11 2021-04-11 TMG0045 0.00156 AU (233,000 km; 145,000 mi) 0.61[note 15] 3.7–12 28.8 — NEOCP[95]
2021-04-12 2021-04-08 2021 GW4 0.000175 AU (26,200 km; 16,300 mi) 0.068 3.5–7.8 29.4 — JPL[96] · MPC[97]
2021-04-13 2021-04-13 2021 GC13 0.002281 AU (341,200 km; 212,000 mi) 0.89 4.0–9.0 29.1 – JPL[98] · MPC[99]
2021-04-13 2021-04-13 ZTF0KwS 0.00105 AU (157,000 km; 98,000 mi) 0.41[note 16] 2.4–15 29.0 ? NEOCP[100]
2021-04-13 2021-04-11 2021 GC8 0.001455 AU (217,700 km; 135,300 mi) 0.57 2.2–5.0 30.4 — JPL[101] · MPC[102]
2021-04-14 2021-04-14 2021 GQ10 0.001164 AU (174,100 km; 108,200 mi) 0.45 12–28 26.7 — JPL[103] · MPC[104]
2021-04-14 2021-04-15 2021 GW16 0.000195 AU (29,200 km; 18,100 mi) 0.076 2.6–5.8 30.1 — JPL[105] · MPC[106]
2021-04-15 2021-04-18 2021 HC1 0.001545 AU (231,100 km; 143,600 mi) 0.60 6.4–14 28.1 ✓ JPL[107] · MPC[108]
2021-04-15 2021-04-14 2021 GF10 0.000773 AU (115,600 km; 71,900 mi) 0.30 6.2–14 28.2 — JPL[109] · MPC[110]
2021-04-15 2021-04-14 2021 GN10 0.001924 AU (287,800 km; 178,800 mi) 0.75 5.6–13 28.4 ✓ JPL[111] · MPC[112]
2021-04-16 2021-04-17 ZTF0KyD 0.00213 AU (319,000 km; 198,000 mi) 0.83[note 17] 3.2–20 28.4 ? NEOCP[113]
2021-04-17 2021-04-18 2021 HE1 0.001526 AU (228,300 km; 141,900 mi) 0.59 4.4–9.8 28.9 ✓ JPL[114] · MPC[115]
2021-04-17 2021-04-14 P11f7ua 0.00108 AU (162,000 km; 100,000 mi) 0.42[note 18] 2.9–9.4 29.3 — NEOCP[116]
2021-04-17 2021-04-17 B04SK17 0.00106 AU (159,000 km; 99,000 mi) 0.41[note 19] 3.1–30 28.0 ? NEOCP[117]
2021-04-19 2021-04-17 2021 HN 0.001699 AU (254,200 km; 157,900 mi) 0.66 11–25 26.9 — JPL[118] · MPC[119]
2021-04-23 2021-04-25 A10wMMp 0.000735 AU (110,000 km; 68,300 mi) 0.29[note 20] 2.5–16 28.9 ? NEOCP[120]
2021-04-24 2021-04-24 ZTF0Kzz 0.0016 AU (240,000 km; 150,000 mi) 0.62[note 21] 1.2–7.5 30.5 ? NEOCP[121]
2021-05-02 2021-05-02 S514008 0.00079 AU (118,000 km; 73,000 mi) 0.31[note 22] 2.4–15 29.0 ? NEOCP[122]
2021-05-02 2021-05-03 2021 JW 0.001733 AU (259,300 km; 161,100 mi) 0.67 8.3–19 27.5 — JPL[123] · MPC[124]
2021-05-04 2021-05-03 2021 JV 0.000936 AU (140,000 km; 87,000 mi) 0.36 8.8–20 27.4 — JPL[125] · MPC[126]
2021-05-06 2021-05-05 2021 JS1 0.000739 AU (110,600 km; 68,700 mi) 0.29 5.4–12 28.5 — JPL[127] · MPC[128]
2021-05-07 2021-05-09 P11gae7 0.00126 AU (188,000 km; 117,000 mi) 0.49[note 23] 3.1–19 28.5 — NEOCP[129]
2021-05-08 2021-05-07 2021 JQ2 0.000449 AU (67,200 km; 41,700 mi) 0.17 2.7–6.0 30.0 — JPL[130] · MPC[131]
2021-05-08 2021-05-09 P11gae5 0.00057 AU (85,000 km; 53,000 mi) 0.22[note 24] 1.3–8.2 30.3 — NEOCP[132]
2021-05-09 2021-05-12 P11ggM3 0.00235 AU (352,000 km; 218,000 mi) 0.91[note 25] 1.2–7.5 30.5 — NEOCP[133]
2021-05-13 2021-05-08 2021 JB6 0.000706 AU (105,600 km; 65,600 mi) 0.27 4.7–10 28.8 — JPL[134] · MPC[135]
2021-05-14 2021-05-14 2021 JU6 0.000442 AU (66,100 km; 41,100 mi) 0.17 8.9–20 27.4 — JPL[136] · MPC[137]
2021-05-27 2021-06-01 2021 LV 0.001876 AU (280,600 km; 174,400 mi) 0.73 7.2–16 27.8 ✓ JPL[138] · MPC[139]
2021-05-30 2021-05-30 2021 KO2 0.002478 AU (370,700 km; 230,300 mi) 0.96 6.7–15 28.0 — JPL[140] · MPC[141]
2021-05-30 2021-05-30 TMG0049 0.000726 AU (108,600 km; 67,500 mi) 0.28[note 26] 2.2–7.1 29.9 — NEOCP[142]
2021-05-31 2021-05-30 2021 KN2 0.000966 AU (144,500 km; 89,800 mi) 0.38 5.0–11 28.6 — JPL[143] · MPC[144]
2021-05-31 2021-05-31 2021 KQ2 0.001185 AU (177,300 km; 110,200 mi) 0.46 2.8–6.2 29.9 — JPL[145] · MPC[146]
2021-05-31 2021-05-31 C5Q2Z32 0.0000774 AU (11,580 km; 7,190 mi) 0.030[note 27] 0.67–4.1 31.8 — NEOCP[147]
2021-06-01 2021-05-31 2021 KT2 0.001949 AU (291,600 km; 181,200 mi) 0.76 5.6–13 28.4 — JPL[148] · MPC[149]
2021-06-04 2021-06-05 2021 LX1 0.001067 AU (159,600 km; 99,200 mi) 0.42 10–23 27.1 — JPL[150] · MPC[151]
2021-06-12 2021-06-11 2021 LG5 0.001064 AU (159,200 km; 98,900 mi) 0.41 4.8–11 28.7 — JPL[152] · MPC[153]
2021-06-13 2021-06-08 2021 LO2 0.001483 AU (221,900 km; 137,900 mi) 0.58 6.6–15 28.0 — JPL[154] · MPC[155]
2021-06-15 2021-06-18 2021 MU 0.001109 AU (165,900 km; 103,100 mi) 0.43 10–22 27.1 — JPL[156] · MPC[157]
2021-06-17 2021-06-17 2021 ME 0.002116 AU (316,500 km; 196,700 mi) 0.82 4.3–9.6 29.0 — JPL[158] · MPC[159]
2021-07-03 2021-07-01 2021 NA 0.000436 AU (65,200 km; 40,500 mi) 0.17 5.2–12 28.6 — JPL[160] · MPC[161]
2021-07-08 2021-07-09 2021 NU3 0.001196 AU (178,900 km; 111,200 mi) 0.47 5.2–12 28.6 — JPL[162] · MPC[163]
2021-07-20 2021-07-19 2021 OV 0.001311 AU (196,100 km; 121,900 mi) 0.51 7.7–17 27.7 ✓ JPL[164] · MPC[165]
2021-07-31 2021-07-30 2021 OD1 0.001702 AU (254,600 km; 158,200 mi) 0.66 5.7–13 28.3 — JPL[166] · MPC[167]
2021-08-02 2021-08-02 2021 PC 0.001098 AU (164,300 km; 102,100 mi) 0.43 12–26 26.8 — JPL[168] · MPC[169]
2021-08-05 2021-08-07 2021 PY4 0.001877 AU (280,800 km; 174,500 mi) 0.73 13–29 26.5 — JPL[170] · MPC[171]
2021-08-06 2021-08-08 2021 PK4 0.001598 AU (239,100 km; 148,500 mi) 0.62 6.1–14 28.2 — JPL[172] · MPC[173]
2021-08-14 2021-08-15 2021 PA17 0.000447 AU (66,900 km; 41,600 mi) 0.17 7.3–16 27.8 — JPL[174] · MPC[175]
2021-08-27 2021-08-27 2021 QD1 0.002045 AU (305,900 km; 190,100 mi) 0.80 4.8–11 28.7 — JPL[176] · MPC[177]
2021-08-28 2021-08-30 2021 QV3 0.000854 AU (127,800 km; 79,400 mi) 0.33 2.4–5.3 30.2 — JPL[178] · MPC[179]
2021-09-02 2021-09-05 2021 RJ1 0.002535 AU (379,200 km; 235,600 mi) 0.99 8.5–19 27.5 ✓ JPL[180] · MPC[181]
2021-09-08 2021-09-07 2021 RS2 0.000145 AU (21,700 km; 13,500 mi) 0.056 2.3–5.1 30.3 — JPL[182] · MPC[183]
2021-09-08 2021-09-07 2021 RP2 0.000802 AU (120,000 km; 74,600 mi) 0.31 2.4–5.3 30.2 ✓ JPL[184] · MPC[185]
2021-09-09 2021-09-05 2021 RQ2 0.001256 AU (187,900 km; 116,800 mi) 0.49 3.3–7.4 29.5 — JPL[186] · MPC[187]

Warning times by size

This sub-section visualises the warning times of the close approaches listed in the above table, depending on the size of the asteroid. The sizes of the charts show the relative sizes of the asteroids to scale. For comparison, the approximate size of a person is also shown. This is based the absolute magnitude of each asteroid, an approximate measure of size based on brightness.[1]

Absolute magnitude 30 and greater

Silhouette of man standing and facing forward
Silhouette of man standing and facing forward

(size of a person for comparison)

After closest approach: 10 (41.7%)< 24 hours before: 5 (20.8%)up to 7 days before: 9 (37.5%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 29-30

After closest approach: 9 (40.9%)< 24 hours before: 5 (22.7%)up to 7 days before: 8 (36.4%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 28-29

After closest approach: 10 (27.8%)< 24 hours before: 14 (38.9%)up to 7 days before: 12 (33.3%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 27-28

After closest approach: 7 (63.6%)< 24 hours before: 1 (9.1%)up to 7 days before: 3 (27.3%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 26-27

After closest approach: 4 (40.0%)< 24 hours before: 2 (20.0%)up to 7 days before: 4 (40.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute magnitude 25-26

After closest approach: 0 (0.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (100.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)


Notes

  1. ^ 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 (0.166 LD).
  2. ^ Objects that approached closer to the Moon than Earth are marked with a check.
  3. ^ For unconfirmed asteroids, the provided distance range is for the 25th and 75th percentile. As a result, there is a 50% chance the asteroid's approach distance was outside of this range. Additionally, the uncertainty is usually asymmetric, so an asteroid at a nominal distance of 0.4-0.7 LD may have been more likely to only approach to 1.0 LD than to 0.3 LD.
  4. ^ Distance error: 0.0015 AU, approach range: 0.27 to 1.40 LD. There was a roughly 0.6% chance of impact.
  5. ^ Distance error: 0.000097 AU, approach range: 0.21 to 0.28 LD.
  6. ^ Distance error: 0.0005 AU, approach range: 0.28 to 0.66 LD.
  7. ^ Distance error: 0.00011 AU, approach range 0.037 to 0.12 LD. There was a roughly 11.7% chance of impact.
  8. ^ Distance error: 0.000082 AU, approach range: 0.55 to 0.61 LD.
  9. ^ Distance error: 0.0015 AU, approach range: 0.40 to 1.67 LD.
  10. ^ Distance error: 0.00004 AU, approach range: 0.082 to 0.11 LD.
  11. ^ Distance error: 0.0008 AU, approach range: 0.64 to 1.28 LD.
  12. ^ Distance error: 0.00000182 AU, approach range: 0.854 to 0.856 LD.
  13. ^ Distance error: 0.0000170 AU, approach range: 0.48 to 0.51 LD.
  14. ^ Distance error: >0.001 AU, approach range: 0.18 to 93 LD. Although highly asymmetric, there is still a 56% chance the asteroid passed within 2 LD of Earth, and a 15% chance it passed within 7 Earth radii of the planet.
  15. ^ Distance error: 0.000000822 AU.
  16. ^ Distance error: 0.0009 AU, approach range: 0.13 to 0.86 LD. There was a roughly 2.2% chance of impact.
  17. ^ Distance uncertainty: 0.00070 AU, approach range: 0.58 to 1.07 LD.
  18. ^ Distance error: 0.000166 AU, approach range: 0.35 to 0.48 LD.
  19. ^ Distance error: 0.0009 AU, approach range: 0.14 to 0.89 LD.
  20. ^ Distance error: 0.00078 AU, approach range: 0.077 to 0.70 LD. There was a roughly 5% chance of impact.
  21. ^ Distance error: highly asymmetric, approach range: 0.011 to 30.7 LD. There was a roughly 38% chance of impact.
  22. ^ Distance error: 0.001 AU, approach range: 0.066 to 0.86 LD. There was a roughly 12.1% chance of impact.
  23. ^ Distance error: 0.0004 AU, approach range: 0.37 to 0.68 LD.
  24. ^ Distance error: 0.00022 AU, approach range: 0.16 to 0.38 LD.
  25. ^ Distance error: 0.0010 AU, approach range: 0.61 to 1.51 LD.
  26. ^ Distance error: 0.00000017 AU, approach range: 0.2824 to 0.2825 LD.
  27. ^ Distance error: 0.00002 AU, approach range: 0.024 to 0.041 LD. There was a roughly 5.6% chance of impact.

Additional examples

Goldstone radar images of asteroid 99942 Apophis on 8–10 March 2021
Goldstone radar images of asteroid 2001 FO32 during closest approach on 21 March 2021

Below is an example list of near-Earth asteroids that passed or will pass more than 1 lunar distance (384,400 km or 0.00256 AU) from Earth in 2021.

Object Size
(meters) 		Nearest approach
(lunar
distances) 		Date Ref
2018 RB 120-260 18.27 2021-02-07 JPL · CAD
(456537) 2007 BG 330-750 22.35 2021-02-26 JPL · CAD
2016 DV1 29-65 2.1 2021-03-03 JPL · CAD
99942 Apophis 370 43.85 2021-03-06 JPL · CAD
(231937) 2001 FO32 550 5.25 2021-03-21 JPL · CAD
(441987) 2010 NY65 140-310 15.54 2021-06-25 JPL · CAD
2021 LD1 1,200[188] 11.78 2021-07-09 JPL · CAD
(285571) 2000 PQ9 640-1,400 26.16 2021-07-21 JPL · CAD
2008 GO20 97-220 11.78 2021-07-25 JPL · CAD
2018 LM4 460-1,000 31.85 2021-08-06 JPL · CAD
2016 AJ193 1,374 8.92 2021-08-21 JPL · CAD
3361 Orpheus 300 15.01 2021-11-21 JPL · CAD
Planet Venus[note2 1] — 107.4 2021-12-31 JPL

Notes

  1. ^ For comparison as closest Venus approach is 2022-Jan-08 at 103 LD.

See also

References

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