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10 newly-discovered asteroids within 1 lunar distance in 10 days

10-newly-discovered-asteroids-10-days

10 newly-discovered asteroids with a close approach within 1 lunar distance (<1LD asteroid) were discovered from October 12 to 18, 2020, marking a significant increase in detection and flybys of asteroids within 1 lunar distance in such a short period of time. 

9 newly-discovered asteroid flybys were detected from October 15 to 18.

Over the next 3 days (October 18 – 21), 5 newly-discovered asteroids will fly past Earth within 1 lunar distance.

From October 1 to 18, our sky surveys have detected 12 <1LD asteroids, tying the month with September 12 days before the end of the month.

There are now 84 known asteroids to flyby Earth within 1 lunar distance since the start of the year, including 2020 SO on December 1.

2020 now has now surpassed 2019 by 7 <1LD asteroids and holds the record for the closest asteroid flyby.

This report summarizes 10 newly-discovered <1LD asteroid flybys from October 12 to 21 in chronological order, with links to CNEOS' and Minor Planet Center's detailed pages for each object.

Detailed statistics for the current month and the year are at the end of the report.

2020 TS1

2020 TS1 belongs to the Aten group of asteroids. It was first detected at Pan-STARRS 1, Haleakala, Hawaii on October 8.

Its estimated diameter is between 4 and 5 m (13 – 16 feet).

The close approach took place at 10:57 UTC on October 12 at a distance of 0.66 LD / 0.00170 AU (254 316 km / 158 024 miles).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference:

2020 TS1 at MPC, CNEOS

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2020 TD7

Asteroid 2020 TD7 belongs to the Apollo group of asteroids. It was first observed at ATLAS-MLO, Mauna Loa on October 15.

Its close approach took place at 09:50 UTC on October 13 at a distance of 0.88 LD / 0.00227 AU (339 587 km / 211 009 miles).

The asteroid has an estimated diameter between 11 and 26 m (36 – 85 feet).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 TD7 at MPC, CNEOS

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2020 TK7

2020 TK7 belongs to the Aten group of asteroids. It was first detected at Mt. Lemmon Survey, Arizona on October 15.

Its estimated diameter is between 3.2 and 7.2 m (10 – 23 feet).

The close approach took place at 16:00 UTC on October 15 at a distance of 0.20 LD / 0.00050 AU (74 798 km / 46 477 miles).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 TK7 at MPC, CNEOS

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2020 UE

Asteroid 2020 UE was first observed on October 17 at Catalina Sky Survey, Arizona.

Its close approach took place at 08:55 UTC on October 15 at a distance of 0.71 LD / 0.00182 AU (272 268 km / 169 179 miles).

The asteroid has an estimated diameter between 21 and 46 m (68 – 150 feet).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 UE at MPCCNEOS

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2020 TG6

This asteroid belongs to the Apollo group of asteroids and has an estimated diameter between 4.1 and 9.2 m (13 – 30 feet).

It was first observed at Mt. Lemmon Survey on October 15.

Close approach took place at 18:03 UTC on October 17 at a distance of 0.36 LD / 0.00093 AU (139 126 km / 86 448 miles).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 TG6 at MPCCNEOS

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2020 TE6

Asteroid 2020 TE6 will flyby Earth at 19:19 UTC on October 18 at a distance of 0.60 LD / 0.00154 AU (230 380 km / 143 151 miles).

The object belongs to the Apollo group of asteroids. It was first observed at Pan-STARRS 1, Haleakala, Hawaii on October 15, three days before its close approach.

TE6 has an estimated diameter of 8.2 – 18 m (26 – 59 feet).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 TE6 at MPCCNEOS

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2020 UX

Asteroid 2020 UX was first observed at Mt. Lemmon Survey, Arizona on October 17, two days before its close approach.

The asteroid has an estimated diameter between 1.6 and 3.6 m (5.2 – 11.8 feet).

The object will make its close approach to Earth at 06:56 UTC (± 00:18) on October 19 at a distance of 0.49 LD / 0.00127 AU (189 989 km / 118 053 miles).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 UX at MPCCNEOS

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2020 TF6

2020 TF6 was first observed at Mt. Lemmon Survey on October 15, four days before its close approach to Earth.

It has an estimated diameter between 8.7 and 19 m (28 – 62 feet) and belongs to the Apollo group of asteroids.

Close approach will take place at 19:24 UTC (± 00:11) on October 19 at a distance of 0.40 LD / 0.00103 AU (154 085 km / 95 744 miles).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 TF6 at MPCCNEOS

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2020 UA

Asteroid 2020 UA belongs to the Aten group of asteroids and has an estimated diameter between 5.9 and 13 m (19 – 42 feet).

It was first observed at Mt. Lemmon Survey on October 16, 5 days before flyby.

Close approach will take place at 02:04 UTC (± 02:24) on October 21 at a distance of 0.12 LD / 0.00029 AU (43 383 km / 26 957 miles).

This is the closest flyby of the 10 between October 12 and 21.

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 UA at MPCCNEOS

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2020 UY

Asteroid 2020 UY belongs to the Apollo group of asteroids and has an estimated diameter between 3.8 and 8.6 m (12 – 28 feet).

It was first observed at Mt. Lemmon Survey on October 17, 4 days before its close approach.

The object will fly past us at 04:18 UTC (± 00:20) on October 21 at a distance of 0.91 LD / 0.00234 AU (350 059 km / 217 516 miles).

Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]

Reference

2020 UY at MPCCNEOS

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<1LD asteroids in 2020

Asteroid flybys within 1 lunar distance in 2020 (valid 10:43 UTC, October 18):

NEODATE / TIME UTCDISTANCE LD | AU Diameter (m)
2020 SODecember 1 @ 09:41 ± 00:010.13 | 0.000335.1 – 11
2020 UYOctober 21 @ 04:18 ± 02:040.91 | 0.002343.8 – 8.6
2020 UAOctober 21 @ 02:04 ± 02:040.12 | 0.000305.9 – 13
2020 TF6October 19 @ 19:24 ± 00:110.40 | 0.001038.7 – 19
2020 UXOctober 19 @ 06:56 ± 00:180.49 | 0.001261.6 – 3.2
2020 TE6October 18 @ 19:19 ± 00:020.60 | 0.001548.2 – 18
2020 TG6October 17 @ 18:03 ± < 00:010.36 | 0.000934.1 – 9.2
2020 UEOctober 15 @ 08:55 ± < 00:010.71 | 0.0018221 – 46
2020 TK7October 14 @ 16:00 ± < 00:010.20 | 0.000503.2 – 7.2
2020 TD7October 14 @ 16:00 ± 00:030.88 | 0.0022711 – 26
2020 TS1October 12 @ 10:57 ± < 00:010.66 | 0.001704 – 9
2020 TE5October 9 @ 18:18 ± 00:050.15 | 0.000384.2 – 9.3
2020 TAOctober 1 @ 11:06 ± 00:090.57 | 0.0014721 – 48
2020 SQ4September 26 @ 18:05 ± < 00:010.92 | 0.002364.5 – 10
2020 SN5September 24 @ 12:47 ± < 00:010.53 | 0.001356.1 -14
2020 SWSeptember 24 @ 11:13 ± < 00:010.07 | 0.000194.3 – 9.7
2020 SG6September 23 @ 12:45  ± < 00:040.58 | 0.001493.7 – 8.3
2020 SZ2September 19 @ 04:16 ± < 00:010.95 | 0.002453.5 – 7.9
2020 RZ6September 17 @ 18:23 ± < 00:010.88 | 0.0022712 – 27
2020 RD4September 14 @ 20:33 ± < 00:010.28 | 0.000712.9 – 6.5
2020 RF3September 14 @ 06:49 ± 00:010.24 | 0.000635.3 – 12
2020 SPSeptember 13 @ 00:57 ± 00:020.86 | 0.002229.9 – 22
2020 RG10September 10 @ 11:33 ± 00:020.35 | 0.000914.3 – 9.7
2020 RE5September 9 @ 16:50 ± 00:030.64 | 0.001644.1 – 9.2
2011 ES4September 1 @ 16:12 ± < 00:010.32 | 0.0008122 – 49
2020 QR5August 23 @ 04:20  ± < 00:010.83 | 0.002149.1 – 20
2020 QQ4August 22 @ 23:18 ± < 00:010.80 | 0.002064.6 – 10
2020 QN4August 21 @ 04:23 ± < 00:010.71 | 0.001825 – 11
2020 QY2August 20 @ 23:50 ± < 00:010.17 | 0.000441.6 – 3.6
2020 PY2August 20 @ 21:29 ± < 00:010.91 | 0.0023412 – 27
2020 QF2August 18 @ 01:41 ± < 00:010.55 | 0.001407.1 – 16
2020 QGAugust 16 @ 04:09 ± < 00:010.02 | 0.0000623*2.9 – 6.4
2020 PW2August 14 @ 04:25 ± < 00:010.73 | 0.001874.9 – 11
2020 QJ5August 12 @ 14:59 ± < 00:010.77 | 0.0019712 – 26
2020 PX5August 11 @ 08:45 ± < 00:010.59 | 0.001533.2 – 7.2
2020 PAAugust 1 @ 01:56 ± < 00:010.15 | 0.000394.6 – 10
2020 OY4July 28 @ 05:32  ± < 00:010.11 | 0.000282.3 – 5.2
2020 NBJuly 5 @ 21:21 ± < 00:010.46 | 0.0011915 – 33
2020 ML2June 13 @ 04:45 ± < 00:010.93 | 0.002386.7 – 15
2020 LDJune 5 @ 08:25 ± 00:05 0.80 | 0.0020589 – 200
2020 KC5May 29 @ 20:46 ± < 00:010.97 | 0.002489.1 – 20
2020 KJ4May 28 @ 13:21 ± < 00:010.37 | ​0.000962.8 – 6.2
2020 KF5May 28 @ 12:47 ± < 00:080.64 | 0.001653.5 – 7.8
2020 JNMay 5 @ 03:22 ± < 00:010.65 | ​0.001679 – 20
2020 JJMay 4 @ 12:05 ± < 00:010.03 | 0.00008962.7 – 6
2020 JAMay 3 @ 20:01 ± < 00:010.62 | 0.001609.6 – 22
2020 JGApril 30 @ 19:38 ± < 00:020.56 | 0.0014318 – 41
2020 HS7April 28 @ 18:51 ± < 00:010.11 | 0.000294 – 8.9
2020 HP6April 27 @ 14:40 ± < 00:010.33 | 0.000846.7 – 15
2020 HT8April 26 @ 13:33 ± 00:010.38 | 0.000995.8 – 13
2020 HX3April 24 @ 19:38 ± < 00:010.66 | 0.0016911 – 24
2020 HU7April 22 @ 20:19 ± < 00:010.34 | 0.000873.1 – 7
2020 HF5April 22 @ 16:41 ± < 00:010.38 | 0.00098 12 – 27
2020 HM6April 22 @ 05:51 ± 00:050.42 | 0.0010913 – 28
2020 GH2April 15 @ 12:45 ± 00:500.93 | 0.0024013 – 30
2020 HOApril 15 @ 10:06 ± 00:01 0.75 | 0.001934.6 – 10
2020 GY1April 5 @ 07:37 ± < 00:010.21 | 0.0005413 – 28
2020 GHApril 3 @ 22:04 ± < 00:010.33 | 0.000844.1 – 9.2
2020 GO1April 1 @ 19:09 ± < 00:010.18 | 0.000467.9 – 18
2020 FB7March 31 @ 16:17 ± < 00:010.20 | 0.0005216 -36
2020 FJ4March 25 @ 13:42 ± < 00:010.67 | 0.001723.4 – 7.6
2020 FL2March 22 @ 20:32 ± < 00:010.38 | 0.0009915 – 33
2020 FG4March 19 @ 00:51 ± 00:010.49 | 0.0012610 – 23
2020 FDMarch 18 @ 04:05 ± < 00:010.67 | 0.001717.8 – 17
2020 FD2March 18 @ 20:17 ± 00:310.85 | 0.0021920 – 44
2020 DR4February 24 @ 20:30 ± 00:030.24 | 0.000623 – 6.8
2020 DWFebruary 18 @ 17:02 ± < 00:010.63 | 0.001612.3 – 5.1
2020 DA1February 18 @ 10:32 ± < 00:010.50 | 0.001293.1 – 6.8
2020 CQ2February 14 @ 02:19 ± < 00:010.39 | 0.000995 – 11
2020 CD3February 13 @ 16:20 ± < 00:010.12 | 0.000311.2 – 2.7
2020 DUFebruary 13 @ 13:22 ± 00:060.85 | 0.002174.9 – 11
2020 CQ1February 4 @ 11:16 ± 00:020.17 | 0.000434.6 – 10
2020 BT14February 3 @ 08:19 ± < 00:010.49 | 0.00126​7.9 – 18
2020 CAFebruary 2 @ 15:49 ± 00:020.57 | 0.00147​3.2 – 7.2
2020 CWFebruary 1 @ 12:50 ± < 00:01 0.04 | 0.000110.83 – 1.9
2020 CJJanuary 31 @ 19:03 ± < 00:01 0.92 | 0.0023611 – 24
2020 CZJanuary 31 @ 03:51 ± 00:480.82 | 0.002103.7 – 8.2
2020 BZ13January 29 @ 01:18 ± < 00:010.28 | 0.000712.9 – 6.5
2020 BA15January 28 @ 18:03 ± 00:020.98 | ​0.002518.9 – 20
2020 BA13January 27 @ 16:56 ± < 00:01 0.51 | ​0.001324.7 – 11
2020 BH6January 25 @ 05:11 ± < 00:010.18 | ​0.000475.2 – 12
2020 BB5January 22 @ 00:20 ± 00:200.69 | 0.001773.3 – 7.4
2020 BK3January 20 @ 20:51 ± 00:050.78 | 0.0020011 – 25
2020 AP1January 2 @ 15:33  ± 00:020.85 | 0.002183.2 – 7.2

*Closest asteroid flyby on record

<1LD asteroids in 2019

Asteroids detected within 1 lunar distance in 2019 (total 77):

NEODATE / TIME UTCDISTANCE LD | AU Diameter (m)
2019 YV4December 25 @ 21:41 ± 11:010.98 | 0.002519.3 – 21
2019 YU2December 23 @ 19:28 ± < 00:010.26 | 0.000668.9 – 20
2019 YSDecember 18 @ 15:12 ± < 00:010.17 | 0.000441.3 – 3
2019 YBDecember 18 @ 00:12 ± 00:03 0.44 | 0.001133.1 – 7
2019 WJ4November 30 @ 20:05 ± < 00:010.85 | 0.002195.5 – 12
2019 WG2November 23 @ 08:44 ± < 00:010.47 | 0.0012126 – 59
2019 WV1November 19 @ 23:45 ± 03:130.72 | ​0.001866.3 – 14
2019 WHNovember 19 @ 08:01 ± < 00:010.22 | ​0.0005716 – 36
2019 VF5November 9 @ 23:16 ± < 00:010.49 | 0.001278.3 – 19
2019 VB5November 9 @ 17:29 ± < 00:010.38 | 0.000971.2 – 2.7
2019 VS4November 6 @ 16:28 ± < 00:010.36 | 0.000939.3 – 21
2019 VRNovember 4 @ 10:35 ± < 00:010.35 | 0.000916.5 – 14
2019 VDNovember 4 @ 09:55 ± 00:010.45 | 0.001168.7 – 19
2019 VANovember 2 @ 17:41 ± 00:12 0.28 | 0.000725.6 – 12
2019 UG11November 1 @ 20:42 ± 00:020.55 | 0.0014013 – 29
2019 UN13October 31 @ 14:45 ± < 00:010.03 | 8.43e-51 – 2.2
2019 UB8October 29 @ 06:30 ± 00:030.50 | 0.001274 – 8.9
2019 UD10October 27 @ 10:08 ± 00:020.44 | 0.001126.3 – 14
2019 UX12October 26 @ 03:08 ± 00:040.99 | 0.002554.9 – 11
2019 UO8October 25 @ 13:30 ± 00:010.41 | 0.001053.1 – 6.9
2019 UN8October 23 @ 16:41 ± 00:170.93 | 0.00235 3.1 – 6.9
2019 UL3October 19 @ 22:23 ± 00:080.77 | 0.001996 – 13
2019 UGOctober 18 @ 09:23 ± < 00:010.84 | 0.002156.8 – 15
2019 UU1October 18 @ 06:23 ± < 00:010.59 | 0.001502.1 – 5.1
2019 TN5October 5 @ 22:38 ± < 00:010.32 | 0.000835.5 – 12
2019 SP3October 3 @ 06:36 ± 00:340.97 | 0.0024813 – 30
2019 SM8October 1 @ 13:56 ± < 00:01 0.41 | ​0.001063.8 – 8.6
2019 TDSeptember 29 @ 18:50 ± 00:130.34 | ​0.000874.1 – 9.1
2019 TESeptember 28 @ 20:31 ± 01:310.93 | 0.002386.8 – 15
2019 SX8September 28 @ 07:49 ± 00:380.99 | 0.002554.6 – 10
2019 SS3September 22 @ 22:48 ± 00:210.73 | 0.0018815 – 34
2019 SS2September 21 @ 07:12 ± 00:020.30 | ​0.000772 – 4.4
2019 SD1September 21 @ 06:46 ± < 00:01 0.73 | 0.001875.5 – 12
2019 SU2September 21 @ 02:48 ± 00:050.19 | 0.000482.7 – 6.1
2019 SJSeptember 16 @ 18:55 ± 00:030.64 | 0.001638.6 – 19
2019 RC1September 7 @ 10:48 ± 00:040.48 | ​0.001234.5 – 10
2019 RP1September 5 @ 22:04 ± < 00:01 0.10 | ​0.000257.4 – 17
2019 RQSeptember 2 @ 16:45 ± < 00:01 0.29 | ​0.000742.1 – 4.6
2019 QQ3August 26 @ 15:14 ± 00:010.25 | 0.000643.7 – 8.2
2019 QR8August 26 @ 08:51 ± 01:080.80 | 0.002076.6 – 15
2019 QDAugust 22 @ 01:28 ± < 00:08 0.78 | 0.002004.7 – 11
2019 QH2August 20 @ 18:12 ± 00:080.13 | 0.000332.2 – 5
2019 QB1August 20 @ 11:55 ± 00:080.32 | 0.000829.3 – 21
2019 ON3July 29 @ 01:19 ±  00:140.56 | 0.001437.4 – 16
2019 OD3July 28 @ 02:56 ± < 00:010.49 | 0.0012611 – 25
2019 OKJuly 25 @ 01:22 ± < 00:040.19 | ​0.0004857 – 130
2019 ODJuly 24 @ 13:31 ± 00:040.93 | ​0.0023954 – 120
2019 NN3July 10 @ 16:29 ± < 00:010.83 | 0.0021435 – 77
2019 NF7July 9 @ 12:07 ± < 00:01 0.98 | 0.002536.4 – 14
2019 MB4July 9 @ 07:20 ± < 00:010.82 | 0.0021117 – 38
2019 NK1July 2 @ 09:48 ± 00:050.69 | 0.001772.9 – 6.5
2019 LW4June 8 @ 17:04 ± < 00:010.65 | ​​0.001669.3 – 21
2019 LY4June 6 @ 01:30 ± < 00:010.22 | ​​0.000567.3 – 16
2019 KTMay 28 @ 03:48 ± < 00:010.85 | ​0.0021713 – 29
2019 JH2May 16 @ 00:06 ± < 00:010.19 | ​0.000483.1 – 7
2019 JY2May 5 @ 17:12 ± < 00:010.38 | 0.000983.3 – 7.3
2019 JX1May 2 @ 12:39 ± 00:020.47 | 0.001203.8 – 8.6
2019 JKApril 30 @ 08:12 UTC ± 00:010.69 | 0.001787.1 – 16
2019 HEApril 20 @ 21:12 ± < 00:010.58 | 0.0014913 – 30
2019 GC6April 18 @ 06:39 ± 00:290.57 | 0.0014713 – 28
2019 GN20April 12 @ 07:06 ± < 00:010.98 | 0.0025314 – 31
2019 FP21March 31 @ 19:00  ±  07:460.93 | 0.002383 – 6.6
2019 FV1March 31 @ 05:27 ± < 00:010.87 | 0.002234.6 – 10
2019 FC1March 28 @ 05:46 ± < 00:010.27 | 0.0006920 – 45
2019 FQMarch 23 @ 18:17 UTC ± < 00:010.86 | 0.0022010 – 23
2019 EA2March 22 @ 01:53 UTC ± 00:020.80 | 0.0020518 – 40
2019 FAMarch 16 @ 01:14 UTC ± < 00:010.60 | 0.001544.9 – 11
2019 EN2March 13 @ 23:38 UTC ± < 00:010.86 | 0.002218 – 18
2019 EH1March 1 @ 17:38 UTC ± < 00:010.06 | 0.000162.5 – 5.7
2019 DFFebruary 26 @ 21:21 UTC  ± 00:090.47 | 0.001203.0 – 6.7
2019 DG2Febraury 26 @ 07:39 UTC ± 07:390.61 | 0.001585.4 – 12
2019 CN5February 11 @ 07:23 UTC ± 00:030.31 | 0.000797.3 – 16
2019 BZ3January 27 @ 23:29 ± < 00:010.13 | 0.00032 4.8 – 11
2019 BV1January 24 @ 20:53 ± < 00:010.35 | 0.00090 4.8 – 11
2019 BOJanuary 16 @ 01:13 ± 00:020.18 | 0.00046 6.3 – 14
2019 AE9January 12 @ 11:09 ± < 00:010.26 | 0.00067 9.9 – 22
2019 AS5January 8 @ 00:37 ± < 00:010.04 | 0.00010 0.92 – 2.1

 

Featured image credit: MPC

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