Three new asteroids detected within 1 lunar distance – 2019 UL3, 2019 UN8, 2019 UO8
Three new near-Earth asteroids designated 2019 UL3, 2019 UN8 and 2918 UO8, flew past Earth within 1 lunar distance on October 19, 23 and 25, respectively. All three of them were first observed at Mt. Lemmon Survey, Arizona. Their discovery pushed the total number of known <1 LD asteroids since the start of the year to 57. 58 if we include the yet to flyby 2019 UB8.
2019 UL3
2019 UL3 was first observed on October 22, three days after it made a close approach to our planet.
It belongs to the Apollo group of asteroids and has an estimated diameter between 6 and 13 m (19.7 – 42.6 feet).
The object flew past us at a speed (relative to the Earth) of 8.96 km/s at a distance of 0.77 LD / 0.00199 (297 599 km / 184 982 miles) at 22:23 UTC on October 19.
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
Reference
Asteroid 2019 UL3 at Minor Planet Center; at CNEOS
2019 UN8
Apollo-class asteroid 2019 UN8 was first observed on October 25, two days after it made a close approach to our planet.
This object has an estimated diameter between 3.1 and 6.9 m (10.1 – 22.6 feet).
It flew past us at a speed (relative to the Earth) of 19.23 km/s at 0.93 LD / 0.00240 AU (359 034 km / 223 093 miles) at 16:41 UTC on October 23.
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
Reference
Asteroid 2019 UN8 at Minor Planet Center; at CNEOS
2019 UO8
Asteroid designated 2019 UO8 was first observed on October 26, one day after it made a close approach to our planet.
The object belongs to the Apollo group of asteroids and has an estimated diameter between 3.9 and 8.6 m (12.8 – 28.2 feet).
It flew past Earth at a speed (relative to the Earth) of 25.27 km/s at a distance of 0.41 LD / 0.00105 AU (157 077 km / 97 60 miles) at 13:30 UTC on October 25.
[ Ephemeris | Orbit Diagram | Orbital Elements | Physical Parameters | Close-Approach Data ]
Reference:
Asteroid 2019 UO8 at Minor Planet Center; at CNEOS
| NEO | DATE / TIME UTC | DISTANCE LD | AU | Diameter (m) | ||||
| 2019 UG8 | October 29 @ 06:30 ± 00:03 | 0.50 | 0.00127 | 4 – 8.9 | ||||
| 2019 UO8 | October 25 @ 13:30 ± 00:01 | 0.41 | 0.00105 | 3.1 – 6.9 | ||||
| 2019 UN8 | October 23 @ 16:41 ± 00:17 | 0.93 | 0.00235 | 3.1 – 6.9 | ||||
| 2019 UL3 | October 19 @ 22:23 ± 00:08 | 0.77 | 0.00199 | 6 – 13 | ||||
| 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 21 316 known near-Earth objects (NEOs) as of October 25, 2019, 116 more than on October 20. 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 1 926 NEOs since January 1, 2019. 1 839 were discovered during the entire 2018.
Featured image credit: MPC
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