3 newly discovered asteroids flew past Earth within 1 lunar distance on September 21

3 newly discovered asteroids flew past Earth within 1 lunar distance on September 21

Three newly discovered asteroids, designated 2019 SU2, 2019 SD1 and 2019 SS2, flew past Earth within 1 lunar distance on September 21. All three of them belong to the Apollo group of asteroids and all three of them were first observed at Mt. Lemmon Survey, Arizona. Their discovery pushed the number of known <1 LD asteroid flybys this month to 7.

2019 SU2 was first observed on September 22, one day after its close approach. Its estimated diameter is between 2.7 and 6.1 m (8.8 - 20 feet) and it flew past Earth at 02:48 UTC at a distance of 0.19 LD / 0.00048 AU (71 806 km / 44 618 miles).

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

2019 SU2 at Minor Planet Center; CNEOS

2019 SD1 was first observed on September 20, one day before the object made its close approach to Earth. 

Its estimated diameter is between 5.5 and 12 m (18 - 39 feet). The object flew past us at 06:46 UTC at a distance of 0.73 LD / 0.00187 AU (279 748 km / 173 827 miles).

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

2019 SD1 at Minor Planet Center; CNEOS

2019 SS2 was first observed on September 22, one day after it made its close approach to Earth. 

The object has an estimated diameter between 2 and 4.4 m (6.5 - 14.4 feet) and it flew past us at 07:12 UTC at a distance of 0.30 LD / 0.00077 AU (115 190 km / 71 575 miles).

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

Asteroid 2019 SS2 at Minor Planet Center; CNEOS

​A total of 46 known asteroids flew past Earth within 1 lunar distance since the start of the year. 

 

NEODATE / TIME UTCDISTANCE LD | AU Diameter (m)
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: CNEOS

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