Asteroid 2020 CD3 flew past Earth at just 0.12 LD - Earth's second 'mini-moon'

Asteroid 2020 CD3 flew past Earth at just 0.12 LD - Earth's second 'mini-moon'

A newly-discovered asteroid designated 2020 CD3 flew past Earth at a distance of just 0.12 LD / 0.00031 AU (46 375 km / 28 816 miles) on February 13, 2020. This is the 18th known asteroid to flyby Earth within 1 lunar distance since the start of the year and the second closest. 

2020 CD3 was first observed at Mt. Lemmon Survey, Arizona on February 15, two days after it made its close approach to our planet.

It belongs to the Amor group of asteroids, according to Minor Planet Center, and to Apollo according to CNEOS.

The object has an estimated diameter between 1.2 and 2.7 m (3.9 - 8.8 feet) and it flew past Earth at 16:19 UTC at a speed of 4.07 km/s.

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

According to the researchers at the University of Arizona, 2020 CD3 is likely Earth's second 'mini-moon' -- orbiting our planet since it was first captured by the Earth's gravity three years ago. The only other asteroid known to 'orbit Earth' -- 2006 RH120 -- came close to our planet from September 2006 to June 2007.

"It's a big deal as out of one million known asteroids, this is just the second asteroid known to orbit Earth," said Kacper Wierzchos, a researcher specialist for the Catalina Sky Survey who made the discovery along with fellow astronomer Theodore Pruyne.

 

Asteroids detected within 1 lunar distance in 2020 (valid 14:50 UTC, February 27):

NEODATE / TIME UTCDISTANCE LD | AU Diameter (m)
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 @ 16:19 ± < 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 | 0.001267.9 - 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 | 0.00210 3.7 - 8.2
2020 BZ13January 29 @ 01:18 ± < 00:010.28 | 0.00071 2.9 - 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


Asteroids detected within 1 lunar distance in 2019:

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


Reference

Asteroid 2020 CD3 at Minor Planet Center; at CNEOS

Featured image credit: CNEOS

Comments

mh 7 months ago

would be cool if you guys included the object diameter in the RSS email feed blurb too. thanks

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