Asteroids 2019 UU1 and UG flew past Earth within 1 lunar distance on October 18

Asteroids 2019 UU1 and UG flew past Earth within 1 lunar distance on October 18

Two newly discovered asteroids, designated 2019 UU1 and 2019 UG, flew past Earth on October 18, 2019, at a distance of 0.59 LD and 0.84 LD, respectively.

Asteroid 2019 UU1 was first observed at Mt. Lemmon Survey, Arizona on October 19, 2019. The object flew past us at a distance of 0.59 LD (0.00151 AU / 225 892 / 140 363 miles) at 06:23 UTC.

This is Apollo asteroid with an estimated diameter between 2.3 and 5.1 m (7.5 - 16.7 feet).

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

Reference:

2019 UU1 at Minor Planet Center; CNEOS

2019 UG was first observed at Catalina Sky Survey, Arizona on October 19, 2019. The object belongs to the Apollo group of asteroids and has an estimated diameter between 6.8 and 15 m (22.3 - 49.2 feet).

It flew past Earth at a distance of 0.84 LD (0.00215 AU / 321 635 / 199 854 miles) at 09:23 UTC. 

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

Reference:

2019 UG at Minor Planet Center; CNEOS

 

With 2019 UU1 and UG, the total number of known asteroids to flyby Earth within 1 lunar distance this year rose to 54. In 2018, we had a total of 53 known < 1 LD asteroids from January to October.

 

NEO DATE / TIME UTC DISTANCE LD | AU  Diameter (m)
2019 UG October 18 @ 09:23 ± < 00:01 0.84 | 0.00215 6.8 - 15
2019 UU1 October 18 @ 06:23 ± < 00:01 0.59 | 0.00150 2.1 - 5.1
2019 TN5 October 5 @ 22:38 ± < 00:01 0.32 | 0.00083 5.5 - 12
2019 SP3 October 3 @ 06:36 ± 00:34 0.97 | 0.00248 13 - 30
2019 SM8 October 1 @ 13:56 ± < 00:01  0.41 | ​0.00106 3.8 - 8.6
2019 TD September 29 @ 18:50 ± 00:13 0.34 | ​0.00087 4.1 - 9.1
2019 TE September 28 @ 20:31 ± 01:31 0.93 | 0.00238 6.8 - 15
2019 SX8 September 28 @ 07:49 ± 00:38 0.99 | 0.00255 4.6 - 10
2019 SS3 September 22 @ 22:48 ± 00:21 0.73 | 0.00188 15 - 34
2019 SS2 September 21 @ 07:12 ± 00:02 0.30 | ​0.00077 2 - 4.4
2019 SD1 September 21 @ 06:46 ± < 00:01  0.73 | 0.00187 5.5 - 12
2019 SU2 September 21 @ 02:48 ± 00:05 0.19 | 0.00048 2.7 - 6.1
2019 SJ September 16 @ 18:55 ± 00:03 0.64 | 0.00163 8.6 - 19
2019 RC1 September 7 @ 10:48 ± 00:04 0.48 | ​0.00123 4.5 - 10
2019 RP1 September 5 @ 22:04 ± < 00:01  0.10 | ​0.00025 7.4 - 17
2019 RQ September 2 @ 16:45 ± < 00:01  0.29 | ​0.00074 2.1 - 4.6
2019 QQ3 August 26 @ 15:14 ± 00:01 0.25 | 0.00064 3.7 - 8.2
2019 QR8 August 26 @ 08:51 ± 01:08 0.80 | 0.00207 6.6 - 15
2019 QD August 22 @ 01:28 ± < 00:08  0.78 | 0.00200 4.7 - 11
2019 QH2 August 20 @ 18:12 ± 00:08 0.13 | 0.00033 2.2 - 5
2019 QB1 August 20 @ 11:55 ± 00:08 0.32 | 0.00082 9.3 - 21
2019 ON3 July 29 @ 01:19 ±  00:14 0.56 | 0.00143 7.4 - 16
2019 OD3 July 28 @ 02:56 ± < 00:01 0.49 | 0.00126 11 - 25
2019 OK July 25 @ 01:22 ± < 00:04 0.19 | ​0.00048 57 - 130
2019 OD July 24 @ 13:31 ± 00:04 0.93 | ​0.00239 54 - 120
2019 NN3 July 10 @ 16:29 ± < 00:01 0.83 | 0.00214 35 - 77
2019 NF7 July 9 @ 12:07 ± < 00:01  0.98 | 0.00253 6.4 - 14
2019 MB4 July 9 @ 07:20 ± < 00:01 0.82 | 0.00211 17 - 38
2019 NK1 July 2 @ 09:48 ± 00:05 0.69 | 0.00177 2.9 - 6.5
2019 LW4 June 8 @ 17:04 ± < 00:01 0.65 | ​​0.00166 9.3 - 21
2019 LY4 June 6 @ 01:30 ± < 00:01 0.22 | ​​0.00056 7.3 - 16
2019 KT May 28 @ 03:48 ± < 00:01 0.85 | ​0.00217 13 - 29
2019 JH2 May 16 @ 00:06 ± < 00:01 0.19 | ​0.00048 3.1 - 7
2019 JY2 May 5 @ 17:12 ± < 00:01 0.38 | 0.00098 3.3 - 7.3
2019 JX1 May 2 @ 12:39 ± 00:02 0.47 | 0.00120 3.8 - 8.6
2019 JK April 30 @ 08:12 UTC ± 00:01 0.69 | 0.00178 7.1 - 16
2019 HE April 20 @ 21:12 ± < 00:01 0.58 | 0.00149 13 - 30
2019 GC6 April 18 @ 06:39 ± 00:29 0.57 | 0.00147 13 - 28
2019 GN20 April 12 @ 07:06 ± < 00:01 0.98 | 0.00253 14 - 31
2019 FP21 March 31 @ 19:00  ±  07:46 0.93 | 0.00238 3 - 6.6
2019 FV1 March 31 @ 05:27 ± < 00:01 0.87 | 0.00223 4.6 - 10
2019 FC1 March 28 @ 05:46 ± < 00:01 0.27 | 0.00069 20 - 45
2019 FQ March 23 @ 18:17 UTC ± < 00:01 0.86 | 0.00220 10 - 23
2019 EA2 March 22 @ 01:53 UTC ± 00:02 0.80 | 0.00205 18 - 40
2019 FA March 16 @ 01:14 UTC ± < 00:01 0.60 | 0.00154 4.9 - 11
2019 EN2 March 13 @ 23:38 UTC ± < 00:01 0.86 | 0.00221 8 - 18
2019 EH1 March 1 @ 17:38 UTC ± < 00:01 0.06 | 0.00016 2.5 - 5.7
2019 DF February 26 @ 21:21 UTC  ± 00:09 0.47 | 0.00120 3.0 - 6.7
2019 DG2 Febraury 26 @ 07:39 UTC ± 07:39 0.61 | 0.00158 5.4 - 12
2019 CN5 February 11 @ 07:23 UTC ± 00:03 0.31 | 0.00079 7.3 - 16
2019 BZ3 January 27 @ 23:29 ± < 00:01 0.13 | 0.00032  4.8 - 11
2019 BV1 January 24 @ 20:53 ± < 00:01 0.35 | 0.00090  4.8 - 11
2019 BO January 16 @ 01:13 ± 00:02 0.18 | 0.00046  6.3 - 14
2019 AE9 January 12 @ 11:09 ± < 00:01 0.26 | 0.00067  9.9 - 22
2019 AS5 January 8 @ 00:37 ± < 00:01 0.04 | 0.00010  0.92 - 2.1

 

There are a total of 21 200 known near-Earth objects (NEOs) as of October 20, 2019. 108 of them are near-Earth comets (NEC), 900 are asteroids with diameters roughly 1 km (0.62 miles) and larger (NEA-km).

Our sky surveys have discovered a total of 1 811 NEOs since January 1, 2019. 1 839 were discovered during the entire 2018.

Featured image credit: MPC

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