Time of discovery of asteroids which came closer to Earth than the Moon in 2017
After closest approach: 26 (45.6%)< 24 hours before: 6 (10.5%)up to 7 days before: 23 (40.4%)> one week before: 1 (1.8%)> 7 weeks before: 0 (0.0%)> one year before: 1 (1.8%)
  •   After closest approach: 26 (45.6%)
  •   < 24 hours before: 6 (10.5%)
  •   up to 7 days before: 23 (40.4%)
  •   > one week before: 1 (1.8%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 1 (1.8%)

Below is the list of asteroid close approaches to Earth in 2017.

Timeline of known close approaches less than one lunar distance from Earth in 2017

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 2017.[a]

For reference, the radius of Earth is approximately 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. In 2017, five known asteroids have traveled nearer than this, 2017 GM, 2017 UJ2, YU95BEF, 2017 EA, and 2017 WE30. P10ELNY and A104Vqx probably have traveled nearer, but knowledge of their orbits is too poor to be sure.

While most asteroids on this list are confirmed, well-observed unconfirmed objects with a 50% or greater chance of passing within 1 LD of the Earth are included as well.

This list does not include any of the 29 objects that collided with earth in 2017, none of which were discovered in advance, but were recorded by sensors designed to detect detonation of nuclear devices (of the 29 objects detected, 6 had an impact energy greater than that of a 1 kiloton device).[1]

  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 (AU)[b] 		Nominal
geocentric
dist. (LD) 		Size (m)
(approx.) 		(H)
(mag) 		Closer
to
Moon?
2017-01-09 2017-01-07[2] 2017 AG13 0.00139 AU (208,000 km; 129,000 mi) 0.54 13–41 26.1[3]
2017-01-25 2017-01-20[4] 2017 BX 0.00178 AU (266,000 km; 165,000 mi) 0.69 5–18 28.0[5]
2017-01-30 2017-01-29[6] 2017 BH30 0.000347 AU (51,900 km; 32,300 mi) 0.13[c] 4–12 28.8[7]
2017-02-02 2017-01-30[8] 2017 BS32 0.00109 AU (163,000 km; 101,000 mi) 0.42 7–24 27.3[9]
2017-02-23 2017-02-21[10] 2017 DG16 0.000920 AU (137,600 km; 85,500 mi) 0.36 3–9 29.3[11] Yes
2017-02-25 2017-02-22[12] 2017 DR34 0.00149 AU (223,000 km; 139,000 mi) 0.58 3–11 29.1[13]
2017-03-02 2017-03-02[14] 2017 EA 0.000140 AU (20,900 km; 13,000 mi) 0.054 1–5 30.8[15]
2017-03-05 2017-02-27[16] 2017 DS109 0.00236 AU (353,000 km; 219,000 mi) 0.92 13–43 25.9[17]
2017-03-17 2017-03-19[18] 2017 FD3 0.00120 AU (180,000 km; 112,000 mi) 0.47 6–20 27.7[19]
2017-03-17 2017-03-19[20] 2017 FW158 0.000815 AU (121,900 km; 75,800 mi) 0.32 5–14 28.4[21]
2017-03-19 2017-03-17[22] 2017 FS 0.000730 AU (109,200 km; 67,900 mi) 0.28 3–11 29.0[23]
2017-03-20 2017-03-21[24] 2017 FX158 0.00182 AU (272,000 km; 169,000 mi) 0.71 3–11 29.0[25]
2017-03-20 2017-03-20[26] 2017 FN1 0.000423 AU (63,300 km; 39,300 mi) 0.16 2–5 30.6[27]
2017-03-20 2017-03-20[28] 2017 FM1 0.000856 AU (128,100 km; 79,600 mi) 0.33 3–9 29.5[29]
2017-03-30 2017-03-25[30] 2017 FJ101 0.00217 AU (325,000 km; 202,000 mi) 0.85 4–15 28.5[31]
2017-04-02 2017-03-29[32] 2017 FU102 0.00146 AU (218,000 km; 136,000 mi) 0.57 4–13 28.7[33]
2017-04-04 2017-04-03[34] 2017 GM 0.000109 AU (16,300 km; 10,100 mi) 0.042 2–7 29.9[35]
2017-04-16 2017-04-17[36] 2017 HJ 0.000908 AU (135,800 km; 84,400 mi) 0.35 7–22 27.5[37]
2017-04-22 2017-04-26[38] 2017 HG4 0.00156 AU (233,000 km; 145,000 mi) 0.61 6–21 27.6[39]
2017-04-23 2017-04-22[40] 2017 HV2 0.000838 AU (125,400 km; 77,900 mi) 0.33 3–12 28.9[41]
2017-05-02 2017-05-01[42] 2017 JA 0.000666 AU (99,600 km; 61,900 mi) 0.26 3–13 28.9[43]
2017-05-04 2017-05-02[44] 2017 JQ1 0.00114 AU (171,000 km; 106,000 mi) 0.44 3–9 29.4[45]
2017-05-04 2017-05-06[46] 2017 JB2 0.000372 AU (55,700 km; 34,600 mi) 0.14 3–11 29.0[47]
2017-07-21 2017-07-23[48] 2017 OO1 0.000852 AU (127,500 km; 79,200 mi) 0.33 26–93 24.4[49]
2017-08-14 2017-08-16[50] 2017 QP1 0.000419 AU (62,700 km; 38,900 mi) 0.16 31–91 24.3[51]
2017-08-20 2017-08-18[52] 2017 QN2 0.00145 AU (217,000 km; 135,000 mi) 0.56 5–22 27.9[53]
2017-09-03 2017-08-31[54] 2017 QB35 0.00238 AU (356,000 km; 221,000 mi) 0.93 3–9 29.3[55]
2017-09-14 2017-09-18[56] 2017 SQ2 0.00133 AU (199,000 km; 124,000 mi) 0.52 14–49 25.8[57]
2017-09-20 2017-09-17[58] 2017 SM2 0.00207 AU (310,000 km; 192,000 mi) 0.81 6–26 27.3[59]
2017-09-20 2017-09-21[60] 2017 SZ32 0.00137 AU (205,000 km; 127,000 mi) 0.53 3–9 29.2[61] Yes
2017-09-20 2017-09-20[62] 2017 SR2 0.000623 AU (93,200 km; 57,900 mi) 0.24 4–12 28.5[63]
2017-09-24 2017-09-25[64] 2017 SS12 0.00172 AU (257,000 km; 160,000 mi) 0.67 8–27 27.0[65] Yes
2017-09-30 2017-10-01[66] 2017 TQ2 0.000691 AU (103,400 km; 64,200 mi) 0.27 3–8 29.4[67]
2017-10-02 2017-09-29[68] 2017 SX17 0.00058 AU (87,000 km; 54,000 mi) 0.23 4–16 28.1[69]
2017-10-10 2017-10-14[70] 2017 TF5 0.00187 AU (280,000 km; 174,000 mi) 0.73 20–95 24.7[71]
2017-10-12 2012-10-04[72] 2012 TC4 0.000335 AU (50,100 km; 31,100 mi) 0.13[d] 10–31 26.7[73]
2017-10-13 2017-10-21[74]
(Unconfirmed)		 YT80190 0.000537 AU (80,300 km; 49,900 mi) 0.21[e] 2–6 30.4
2017-10-15 2017-10-16[75] 2017 UF 0.00255 AU (381,000 km; 237,000 mi) 0.992 5–20 27.9[76]
2017-10-16 2017-10-15[77] 2017 TH5 0.000668 AU (99,900 km; 62,100 mi) 0.26 4–18 28.2[78]
2017-10-17 2017-10-19[79] 2017 UR2 0.00213 AU (319,000 km; 198,000 mi) 0.83 6–19 27.8[80]
2017-10-19 2017-10-11[81] 2017 TD6 0.00128 AU (191,000 km; 119,000 mi) 0.50 7–28 27.2[82] Yes
2017-10-20 2017-10-21[83] 2017 UJ2 0.000120 AU (18,000 km; 11,200 mi) 0.047 1–5 30.8[84]
2017-10-21 2017-10-25[85] 2017 UA52 0.00132 AU (197,000 km; 123,000 mi) 0.51 4–15 28.5[86] Yes
2017-10-22 2017-10-30[74]
(Unconfirmed)		 YU92F9B 0.00121 AU (181,000 km; 112,000 mi) 0.47[f] 3–10 29.2
2017-10-22 2017-10-30[74]
(Unconfirmed)		 YU95BEF 0.000130 AU (19,400 km; 12,100 mi) 0.051[g] 5–15 28.2
2017-10-28 2017-10-27[87] 2017 UL6 0.000398 AU (59,500 km; 37,000 mi) 0.16 1–3 32.0[88]
2017-10-30 2017-10-29[89] 2017 UK8 0.00151 AU (226,000 km; 140,000 mi) 0.59 4–17 28.3[90]
2017-11-04 2017-11-05[91] 2017 VE 0.00227 AU (340,000 km; 211,000 mi) 0.88 10–31 26.6[92]
2017-11-08 2017-11-16[74]
(Unconfirmed)		 A104Vqx 0.000222 AU (33,200 km; 20,600 mi) 0.086[h] 4–14 28.4
2017-11-09 2017-11-10[93] 2017 VL2 0.000787 AU (117,700 km; 73,200 mi) 0.31 13–42 26.1[94]
2017-11-13 2017-11-15[95] 2017 VF14 0.00205 AU (307,000 km; 191,000 mi) 0.80 4–14 28.5[96]
2017-11-14 2017-11-20[74]
(Unconfirmed)		 P10ELNY 0.000212 AU (31,700 km; 19,700 mi) 0.083[i] 4–12 28.8
2017-11-21 2017-11-20[97] 2017 WW1 0.000942 AU (140,900 km; 87,600 mi) 0.37 3–7 29.7[98]
2017-11-21 2017-11-22[99] 2017 WA14 0.000633 AU (94,700 km; 58,800 mi) 0.25 6–26 27.5[100]
2017-11-26 2017-11-26[101] 2017 WE30 0.000201 AU (30,100 km; 18,700 mi) 0.078 1–3 31.9[102]
2017-12-28 2017-12-25[103] 2017 YZ4 0.00149 AU (223,000 km; 139,000 mi) 0.58 4–18 28.2[104]
2017-12-30 2017-12-28[105] 2017 YE7 0.00206 AU (308,000 km; 191,000 mi) 0.80 4–13 28.5[106]

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.

Abs 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: 2 (33.3%)< 24 hours before: 3 (50.0%)up to 7 days before: 1 (16.7%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Abs Magnitude 29-30

After closest approach: 5 (38.5%)< 24 hours before: 1 (7.7%)up to 7 days before: 7 (53.8%)> 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: 6 (33.3%)< 24 hours before: 2 (11.1%)up to 7 days before: 10 (55.6%)> 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: 0 (0.0%)up to 7 days before: 3 (27.3%)> one week before: 1 (9.1%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude 26-27

After closest approach: 2 (50.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (25.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 1 (25.0%)

Absolute Magnitude 25-26

After closest approach: 1 (50.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 1 (50.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)

Absolute Magnitude less than 25 (largest)

After closest approach: 3 (100.0%)< 24 hours before: 0 (0.0%)up to 7 days before: 0 (0.0%)> one week before: 0 (0.0%)> 7 weeks before: 0 (0.0%)> one year before: 0 (0.0%)
  •   After closest approach: 3 (100.0%)
  •   < 24 hours before: 0 (0.0%)
  •   up to 7 days before: 0 (0.0%)
  •   > one week before: 0 (0.0%)
  •   > 7 weeks before: 0 (0.0%)
  •   > one year before: 0 (0.0%)

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. ^ Closest approach for 2017 BH30 was over the Taymyr Peninsula.
  4. ^ This will mark the first time an asteroid was observed passing less than 1 LD to the Earth on two different occasions.
  5. ^ distance error: 0.0000894 AU, approach range: 0.17 to 0.24 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  6. ^ distance error: 0.000283 AU, approach range: 0.36 to 0.58 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  7. ^ distance error: 0.0000611 AU, approach range: 0.027 to 0.074 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  8. ^ distance error: 0.000163 AU, approach range: 0.023 to 0.15 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  9. ^ distance error: 0.000121 AU, approach range: 0.035 to 0.13 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.

Timeline of close approaches less than one lunar distance from the Moon in 2017

The number of asteroids listed here are significantly less than those of asteroids that approach Earth for several reasons. Asteroids that approach Earth not only move faster, but are brighter and are easier to detect with modern surveys because:

These factors severely limit the amount of Moon-approaching asteroids, to a level many times lower than the asteroids detected passing as close to Earth.

Date of
closest
approach 		Object Nominal lunocentric
distance (AU)[a] 		Nominal lunocentric
distance (LD) 		Size (m)
(approximate) 		(H) Approach
distance
to Earth
(LD)
2017-01-25 2017 BA7 0.00187 AU (280,000 km; 174,000 mi) 0.73 5–16 28.1[107] 1.12
2017-01-25 2017 BX 0.00209 AU (313,000 km; 194,000 mi) 0.81 5–18 28.0[5] 0.69
2017-01-30 2017 BH30 0.00187 AU (280,000 km; 174,000 mi) 0.73 4–12 28.8[7] 0.13
2017-02-03 2017 BS32 0.00193 AU (289,000 km; 179,000 mi) 0.75 7–24 27.3[9] 0.42
2017-02-24 2017 DG16 0.000555 AU (83,000 km; 51,600 mi) 0.22[b] 3–9 29.3[11] 0.36
2017-02-25 2017 DR34 0.00179 AU (268,000 km; 166,000 mi) 0.70 3–11 29.1[11] 0.58
2017-03-02 2017 EA 0.00224 AU (335,000 km; 208,000 mi) 0.87 1–5 30.8[15] 0.054
2017-03-17 2017 FD3 0.00236 AU (353,000 km; 219,000 mi) 0.92 6–20 27.7[19] 0.47
2017-03-17 2017 FW158 0.00104 AU (156,000 km; 97,000 mi) 0.40 5–14 28.4[21] 0.32
2017-04-04 2017 GM 0.00227 AU (340,000 km; 211,000 mi) 0.88 2–7 29.9[35] 0.042
2017-04-21 2017 HG4 0.00177 AU (265,000 km; 165,000 mi) 0.69 6–21 27.6[39] 0.61
2017-04-24 2017 HV2 0.00230 AU (344,000 km; 214,000 mi) 0.90 3–12 28.9[41] 0.33
2017-05-02 2017 JA 0.00251 AU (375,000 km; 233,000 mi) 0.98 3–13 28.9[43] 0.26
2017-05-02 2017 JB2 0.00188 AU (281,000 km; 175,000 mi) 0.73 3–11 29.0[47] 0.14
2017-05-03 2017 JQ1 0.00247 AU (370,000 km; 230,000 mi) 0.96 3–9 29.4[45] 0.44
2017-05-31 2017 KW31 0.00114 AU (171,000 km; 106,000 mi) 0.45 10–36 26.5[108] 1.23
2017-07-21 2017 OO1 0.00236 AU (353,000 km; 219,000 mi) 0.92 25–90 24.5[49] 0.30
2017-08-14 2017 QP1 0.00230 AU (344,000 km; 214,000 mi) 0.90 31–91 24.3[51] 0.16
2017-08-21 2017 QN2 0.00176 AU (263,000 km; 164,000 mi) 0.69 5–22 27.9[53] 0.56
2017-08-26 2017 QQ17 0.00242 AU (362,000 km; 225,000 mi) 0.94 4–17 28.3[109] 1.02
2017-09-03 2017 QB35 0.00245 AU (367,000 km; 228,000 mi) 0.95 3–9 29.3[55] 0.93
2017-09-16 2017 RW17 0.00175 AU (262,000 km; 163,000 mi) 0.68 2–7 29.8[110] 1.08
2017-09-20 2017 SZ32 0.00129 AU (193,000 km; 120,000 mi) 0.50 3–9 29.2[61] 0.53
2017-09-20 2017 SM2 0.00213 AU (319,000 km; 198,000 mi) 0.83 6–26 27.3[59] 0.81
2017-09-24 2017 SS12 0.000320 AU (47,900 km; 29,700 mi) 0.12 8–27 27.0[65] 0.67
2017-09-30 2017 TQ2 0.00221 AU (331,000 km; 205,000 mi) 0.86 3–8 29.4[67] 0.27
2017-10-02 2017 SX17 0.00174 AU (260,000 km; 162,000 mi) 0.68 4–16 28.1[69] 0.22
2017-10-12 2012 TC4 0.00186 AU (278,000 km; 173,000 mi) 0.72 10–31 26.7[73] 0.23
2017-10-13 YT80190 0.00208 AU (311,000 km; 193,000 mi) 0.81[c] 2–6 30.4 0.21
2017-10-17 2017 TH5 0.00142 AU (212,000 km; 132,000 mi) 0.55 4–18 28.2[78] 0.26
2017-10-20 2017 UJ2 0.00166 AU (248,000 km; 154,000 mi) 0.65 1–5 30.8[84] 0.047
2017-10-20 2017 TD6 0.000756 AU (113,100 km; 70,300 mi) 0.29 7–28 27.2[82] 0.50
2017-10-20 2017 UA52 0.000288 AU (43,100 km; 26,800 mi) 0.11[d] 4–15 28.3[86] 0.51
2017-10-22 YU95BEF 0.000481 AU (72,000 km; 44,700 mi) 0.19[e] 5–15 28.2 0.051
2017-10-24 2017 UK3 0.00207 AU (310,000 km; 192,000 mi) 0.80 7–28 27.2[111] 1.38
2017-11-09 2017 VL2 0.00254 AU (380,000 km; 236,000 mi) 0.990 13–42 26.1[94] 0.31
2017-11-09 A104Vqx 0.00204 AU (305,000 km; 190,000 mi) 0.80[f] 4–14 28.4 0.086
2017-11-13 2017 VF14 0.00243 AU (364,000 km; 226,000 mi) 0.94 4–14 28.5[96] 0.80
2017-11-14 P10ELNY 0.00196 AU (293,000 km; 182,000 mi) 0.76[g] 4–12 28.8 0.083
2017-12-18 2017 YJ1 0.00142 AU (212,000 km; 132,000 mi) 0.55 6–26 27.5[112] 1.044
2017-12-28 2017 YZ4 0.00175 AU (262,000 km; 163,000 mi) 0.68 4–18 28.2[104] 0.58

Notes

  1. ^ Distance from the center of the Moon to the center of the object. The Moon has a radius of approximately 1,740 km.
  2. ^ This is the closest any known asteroid has passed to the Moon in nearly three years, after 2014 GY44 passed 0.097 LD from the Moon in March 2014.
  3. ^ distance error: 0.00000802 AU, approach range: 0.807 to 0.814 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  4. ^ This is the closest any known asteroid has passed to the Moon in nearly three years (even closer than 2017 DG16) after 2014 GY44 passed 0.097 LD from the Moon in March 2014.
  5. ^ distance error: 0.00000171 AU, approach range: 0.181 to 0.194 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  6. ^ distance error: 0.0000188 AU, approach range: 0.788 to 0.803 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.
  7. ^ distance error: 0.000177 AU, approach range: 0.69 to 0.83 LD. The asteroid is unconfirmed and will likely never receive a provisional designation.

Additional examples

Radar animation of 2017 BQ6 during closest approach on 7 February 2017
Radar animation of 2014 JO25 during closest approach on 19 April 2017

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 2017.

Object Size
(meters)		 Lunar
distances		 Date
2017 AP19 65 3.34 6 January 2017
2017 BJ30[113] 16 1.03 31 January 2017
2017 BQ6 186 6.57 7 February 2017
2017 DZ37[114] 7 1.005 23 February 2017
2017 DV36[115] 9 1.02 27 February 2017
1998 SL36[116] 313 8.34 16 March 2017
2017 FT102[117] 4 1.05
1.04 moon		 3 April 2017
2014 JO25[118] 823 4.57 19 April 2017
(418094) 2007 WV4[119] 890 7.96 1 June 2017
2017 KQ27[120] 30 1.02
1.34 moon		 6 June 2017
2017 MF[121] 20 1.21 moon 19 June 2017
2017 NT5[122] 110 1.11
1.27 moon		 14 July 2017
2006 SR131[123] 8 0.32 and 11
[clarification needed]		 17–28 September 2017
(496817) 1989 VB[124] 394 7.88 29 September 2017
YT83F29
[citation needed]		 4 2.6
0.73 moon		 14 October 2017
(171576) 1999 VP11[125] 685 5.77 22 October 2017
(444584) 2006 UK[126] 313 8.66 17 November 2017

Statistics

Graph of near-Earth object sizes and close approaches in 2017. Shown here, asteroid 2014 JO25 was the largest asteroid that has approached within 5 LD from Earth in 2017.
Graph of near-Earth object sizes and close approaches in 2017. Shown here, asteroid 2014 JO25 was the largest asteroid that has approached within 5 LD from Earth in 2017.
Discoveries by month
month <1 LD <5 LD
January
3
17
February
3
27
March
9
34
April
5
28
May
3
14
June
0
10
July
1
11
August
2
17
September
5
32
October
14
52
November
8
29
December
2
28
Discoveries by size
Abs. mag <1 LD <5 LD
H <20
0
1
<21
0
0
<22
0
1
<23
0
3
<24
0
7
<25
3
19
<26
2
40
<27
4
74
<28
11
72
<29
18
57
<30
13
19
<31
4
5
<32
1
1
<33
1
1
Discoveries by survey
Survey <1 LD <5 LD
408 – Mount Nyukasa Station
0
1
703 – Catalina Sky Survey
12
52
704 – Lincoln Laboratory ETS
0
1
C51 – WISE
0
1
F51 – Pan-STARRS 1
10
56
G45 – Space Surveillance Telescope
0
3
G96 – Mt. Lemmon Survey
28
157
I52 – Steward Observatory, Mount Lemmon
0
1
J04 – ESA OGS
0
1
K88 – GINOP-KHK
0
1
T05 – ATLAS – Haleakala
2
11
T08 – ATLAS – Mauna Loa
5
15
Y00 – SONEAR
0
2

Virtual impactors

List of asteroids with a Palermo Technical Impact Hazard Scale greater than −6 that are listed on the Sentry Risk Table because they have short observation arcs with poorly constrained orbits and have a chance of impacting Earth in 2017. Given a short observation arc, many different orbits fit the observed data. 2010 XB73 could have approached Earth around May 2017 or could have been 9 AU[127] from Earth on the way to a close approach with Saturn in 2018. A Palermo rating of −4 indicates an event that is 10,000 times less likely than the background hazard level of Earth impacts, which is defined as the average risk posed by objects of the same size or larger over the years until the date of the potential impact.

Date Object Estimated
diameter
(meters) 		Obs
arc
(days) 		Impact
probability
(1 in) 		Palermo
scale 		JPL Horizons
nominal geocentric
distance (AU) 		NEODyS
nominal geocentric
distance (AU)
2017-05-22[128] 2010 GZ60 2,000[a] 1.3 830,000,000 -1.83 0.4 AU (60,000,000 km; 37,000,000 mi) Not listed
2017-05-25[129] 2010 XB73 110 1.1 120,000,000 -4.47 1.6 AU (240,000,000 km; 150,000,000 mi) 9.0 AU (1.35×109 km; 840,000,000 mi)[127]
2017-08-19[130] 2015 ME131 500 1.8 420,000,000 -3.41 0.4 AU (60,000,000 km; 37,000,000 mi) 0.4 AU (60,000,000 km; 37,000,000 mi)
2017-09-18[131] 2015 HV182 157 0.9 7,700,000,000 -5.78 2.3 AU (340,000,000 km; 210,000,000 mi) 2.3 AU (340,000,000 km; 210,000,000 mi)
2017-11-18[132] 2008 VS4 45 0.083 100,000,000 -5.50 4.6 AU (690,000,000 km; 430,000,000 mi) 3.9 AU (580,000,000 km; 360,000,000 mi)
2017-11-29[133] 2007 YM 20 0.13 2,000,000 -5.21 5.1 AU (760,000,000 km; 470,000,000 mi) 5.1 AU (760,000,000 km; 470,000,000 mi)
2017-12-01[128] 2010 GZ60 2,000[a] 1.3 10,000,000,000 -3.62 1.0 AU (150,000,000 km; 93,000,000 mi) Not listed
2017-12-13[134] 2005 TM173 53 1.9 230,000,000 -5.98 5.7 AU (850,000,000 km; 530,000,000 mi) 5.7 AU (850,000,000 km; 530,000,000 mi)
2017-12-20[128] 2010 GZ60 2,000[a] 1.3 83,000,000 -1.97 1.2 AU (180,000,000 km; 110,000,000 mi) Not listed

Notes

  1. ^ a b c Discovered and only observed by WISE, an infrared telescope, so no apparent magnitude, and therefore estimated size was provided. As such, the size is only a rough estimate. Observation arc is only 1.3 days. Eccentricity is assumed and the object is lost.

See also

References

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  115. ^ "(2017 DV36) orbit diagram". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3769919.
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  120. ^ "(2017 KQ27) orbit diagram". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3775038.
  121. ^ "(2017 MF) orbit diagram". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3775253.
  122. ^ "(2017 NT5) orbit diagram". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 3776550.
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  125. ^ "171576 (1999 VP11) orbit diagram". JPL Small-Body Database. Jet Propulsion Laboratory. SPK-ID: 2171576.
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  127. ^ a b "NEODyS-2 Ephemerides for 2010XB73". (Close Approaches)
  128. ^ a b c 2010 GZ60 -- Earth Impact Risk Summary (4 missed virtual impactors) "Sentry: Earth Impact Monitoring". Archived from the original on 4 May 2017. Retrieved 7 March 2020.
  129. ^ 2010 XB73 -- Earth Impact Risk Summary (2 missed virtual impactors) "2010 XB73 Impact Risk". Archived from the original on 26 January 2016. Retrieved 28 January 2018.
  130. ^ 2015 ME131 -- Earth Impact Risk Summary "2015 ME131 Impact Risk". Archived from the original on 1 August 2015. Retrieved 28 January 2018.
  131. ^ 2015 HV182 -- Earth Impact Risk Summary (4 missed virtual impactors) "2015 HV182 Impact Risk". Archived from the original on 3 July 2015. Retrieved 28 January 2018.
  132. ^ 2008 VS4 -- Earth Impact Risk Summary (21 missed virtual impactors) "2008 VS4 Impact Risk". Archived from the original on 17 January 2009. Retrieved 28 January 2018.
  133. ^ 2007 YM -- Earth Impact Risk Summary (3 missed virtual impactors) "2007 YM Impact Risk". Archived from the original on 3 January 2008. Retrieved 28 January 2018.
  134. ^ 2005 TM173 -- Earth Impact Risk Summary (17 missed virtual impactors) "2005 TM173 Impact Risk". Archived from the original on 31 December 2005. Retrieved 28 January 2018.

External links

2017 in space
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