Near-Earth asteroid
1943 Anteros (1973 EC)
1943 Anteros (1973 EC) is a near-Earth asteroid with an estimated diameter of 2.0–4.4 km (1.2–2.7 mi), in the AMO orbit class. Its next listed approach within 0.2 au is on May 23, 2038. NASA does not classify it as potentially hazardous.
Not potentially hazardous
2.0–4.4 km
Estimated diameter
15.66
Absolute magnitude (H)
12
Approaches within 0.2 au, 1900–2200
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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 May 20, 2050 at about 9,518,913 km.
| Date (TDB) | Nominal distance km | Lunar dist. | Speed km/s | Time uncertainty |
|---|---|---|---|---|
| 2038-May-23 09:26 | 9,934,795 | 25.8 | 5.78 | < 00:01 |
| 2050-May-20 09:34 | 9,518,913 | 24.8 | 5.45 | < 00:01 |
| 2062-May-14 21:01 | 14,362,892 | 37.4 | 5.47 | < 00:01 |
| 2115-Jun-01 17:52 | 20,882,367 | 54.3 | 7.54 | < 00:01 |
| 2127-May-24 21:51 | 9,734,333 | 25.3 | 5.75 | < 00:01 |
| 2139-May-20 15:23 | 10,225,014 | 26.6 | 5.4 | < 00:01 |
| 2151-May-10 11:54 | 22,165,917 | 57.7 | 6.27 | < 00:01 |
Orbit
- Orbit class
- AMO — Near-Earth asteroid orbits similar to that of 1221 Amor
- Orbital period
- 625.3 days (1.71 years)
- Minimum orbit intersection distance
- 0.06255 au (9,357,347 km)
- Observed
- March 10, 1973 to October 24, 2026
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Recent past approaches
| Date (TDB) | Distance km | Lunar dist. | Speed km/s |
|---|---|---|---|
| 2026-May-30 08:25 | 19,770,855 | 51.4 | 7.39 |
| 1973-May-12 13:39 | 16,279,240 | 42.3 | 5.55 |
| 1961-May-19 05:02 | 9,794,173 | 25.5 | 5.42 |
| 1949-May-22 08:44 | 9,807,636 | 25.5 | 5.74 |
| 1937-May-28 20:45 | 18,431,954 | 47.9 | 7.2 |
← 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: 1943 Anteros (1973 EC)
Distances are nominal predictions and can change with new observations. OpenOrbit is not affiliated with or endorsed by NASA or JPL.