2023 EF is an asteroid in the Aten orbit class. Its orbit takes it from 0.81 AU to 1.17 AU from the Sun; one orbit takes 361.2 days. Orbit from the JPL solution of 18 March 2024.
Where is it now
- Distance from Sun
- 0.815 AU
- True anomaly
- 349.58°
- Distance from Earth
- 0.213 AU
- As of
- 2 November 2026
Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.
In the sky
- Right ascension
- 16h 31m 12s
- Declination
- -08° 00′ 11″
- Constellation
- Ophiuchus
- Distance from Earth
- 0.21 AU
- Elongation from the Sun
- 29.37° — near the Sun — look low at dusk or dawn
Visible from both hemispheres.
From your location
See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.
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Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.
Orbital elements
- Semi-major axis
- 0.993 AU
- Eccentricity
- 0.1808
- Inclination
- 4.67°
- Orbital period
- 361.2 days
- Perihelion
- 0.813 AU
- Aphelion
- 1.172 AU
- Longitude of ascending node
- 345.95°
- Argument of periapsis
- 58.13°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 11.4 LD
- 0.0292 AU
- Tisserand (Jupiter)
- 6.099
Orbit quality
Orbit very well determined (uncertainty code 2).
- Observations used
- 37
- Data arc
- 381 days
- First observed
- 1 March 2023
- Last observed
- 16 March 2024
- Residual RMS
- 0.48 ″
- Solution · Otto Matic
- 18 March 2024
Visual & observation
- Absolute magnitude (H)
- 26.18
Discovery & classification
Close approaches 141 on record
Top-down view of the ecliptic, Earth at the centre, for the 2026-11-16 03:22 UTC close approach of 2023 EF. Catalogue miss distance 72.9 LD · 2.8 × 10⁷ km. The curve is the geocentric path from 2026-11-13 to 2026-11-19, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.
| When (UTC) | Body | Distance | Lunar distances | Relative speed |
|---|---|---|---|---|
| 2026-11-16 03:22:00 | Earth | 0.1872 AU | 72.9 LD | 5.9 km/s |
| 2027-04-20 11:05:00 | Earth | 0.1746 AU | 68.0 LD | 4.9 km/s |
| 2027-10-30 18:10:00 | Earth | 0.1879 AU | 73.1 LD | 6.1 km/s |
| 2028-05-05 03:46:00 | Earth | 0.1804 AU | 70.2 LD | 4.8 km/s |
| 2028-10-13 15:10:00 | Earth | 0.1803 AU | 70.2 LD | 6 km/s |
| 2029-05-22 00:48:00 | Earth | 0.1752 AU | 68.2 LD | 4.5 km/s |
| 2029-09-26 19:31:00 | Earth | 0.1644 AU | 64.0 LD | 5.6 km/s |
| 2030-06-12 06:49:00 | Earth | 0.1565 AU | 60.9 LD | 3.8 km/s |
| 2030-09-07 21:33:00 | Earth | 0.1392 AU | 54.2 LD | 4.9 km/s |
| 2031-08-15 03:40:00 | Earth | 0.1023 AU | 39.8 LD | 4.1 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB