Near-Earth asteroid
2020 CB
2020 CB is a near-Earth asteroid with an estimated diameter of 8.0–17 m (26–56 ft). It passes Earth on October 29, 2026 at about 42,675,136 km (111.0 lunar distances). NASA does not classify it as potentially hazardous.
Not potentially hazardous
8.0–17 m
Estimated diameter
27.7
Absolute magnitude (H)
18
Approaches within 0.2 au, 1900–2200
This week’s flyby
- Closest approach
- 2026-Oct-29 08:57 UTC
- Miss distance
- 42,675,136 km · 110.97 lunar distances · 0.28527 au
- Relative speed
- 9.93 km/s (22,219 mph)
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Upcoming close approaches to Earth
7 approaches within 0.2 au (about 30 million km) are calculated from now to 2200. The closest in the 1900–2200 record is on January 28, 2020 at about 1,116,000 km.
| Date (TDB) | Nominal distance km | Lunar dist. | Speed km/s | Time uncertainty |
|---|---|---|---|---|
| 2036-Jun-25 22:25 | 18,535,176 | 48.2 | 5.41 | 3_20:22 |
| 2037-Jun-26 10:56 | 11,562,419 | 30.1 | 6.84 | 1_18:11 |
| 2038-Jun-24 23:53 | 6,854,574 | 17.8 | 8.27 | 2_08:38 |
| 2039-Jun-23 07:20 | 8,241,347 | 21.4 | 9.67 | 2_22:17 |
| 2040-Jun-20 05:20 | 14,826,645 | 38.6 | 11.27 | 3_09:02 |
| 2041-Jun-17 23:37 | 22,981,225 | 59.8 | 13.01 | 3_17:02 |
| 2133-Feb-01 18:50 | 20,538,292 | 53.4 | 12.87 | 4_13:08 |
Recent past approaches
| Date (TDB) | Distance km | Lunar dist. | Speed km/s |
|---|---|---|---|
| 2023-Feb-14 19:10 | 25,329,911 | 65.9 | 5.79 |
| 2022-Dec-31 01:10 | 27,831,188 | 72.4 | 4.48 |
| 2022-Jan-30 21:10 | 16,852,200 | 43.8 | 5.75 |
| 2021-Jan-26 21:10 | 8,028,918 | 20.9 | 7.17 |
| 2020-Jan-28 11:04 | 1,116,000 | 2.90 | 8.77 |
| 2019-Jan-30 03:44 | 9,551,824 | 24.8 | 10.59 |
| 2018-Feb-01 11:37 | 19,788,806 | 51.5 | 12.67 |
| 1957-Jun-15 17:25 | 28,751,215 | 74.8 | 14.16 |
| 1956-Jun-18 20:25 | 16,994,318 | 44.2 | 11.67 |
| 1955-Jun-23 06:32 | 6,803,711 | 17.7 | 9.02 |
| 1954-Jun-25 15:01 | 12,560,237 | 32.7 | 6.54 |
← All asteroids passing Earth this week
Sources
- Size, hazard status and this week’s approach — NASA NeoWs (copy taken Oct 28, 2026, 2:39 AM EDT)
- Close-approach list — JPL SBDB Close Approach Data API (copy taken Oct 28, 2026, 2:39 AM EDT)
- Full orbit details — JPL Small-Body Database: 2020 CB
Distances are nominal predictions and can change with new observations. OpenOrbit is not affiliated with or endorsed by NASA or JPL.