Where is it now
- Distance from Sun
- 1.508 AU
- True anomaly
- 175.58°
- Distance from Earth
- 2.414 AU
- As of
- 22 October 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
- 12h 49m 35s
- Declination
- +00° 20′ 40″
- Constellation
- Virgo
- Distance from Earth
- 2.41 AU
- Elongation from the Sun
- 19.06° — too close to the Sun to observe
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
- 0.944 AU
- Eccentricity
- 0.6042
- Inclination
- 20.67°
- Orbital period
- 335.1 days
- Perihelion
- 0.374 AU
- Aphelion
- 1.515 AU
- Longitude of ascending node
- 22.08°
- Argument of periapsis
- 339.98°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 61.3 LD
- 0.1576 AU
- Tisserand (Jupiter)
- 6.146
Orbit quality
Orbit very well determined (uncertainty code 0).
- Observations used
- 545
- Data arc
- 33.86 years
- First observed
- 18 April 1991
- Last observed
- 27 February 2025
- Residual RMS
- 0.47 ″
- Solution · Otto Matic
- 25 October 2025
Physical properties
- Mean radius
- 0.17 km
Visual & observation
- Geometric albedo
- 0.493
- Absolute magnitude (H)
- 18.93
Discovery & classification
- Discovered by
- LONEOS
- Discovery date
- 21 March 2001
- Discovery site
- Anderson Mesa
Also known as 2001 FZ57
Close approaches 68 on record
Top-down view of the ecliptic, Earth at the centre, for the 2058-05-02 23:46 UTC close approach of 234341. Catalogue miss distance 77.8 LD · 2.99 × 10⁷ km. The curve is the geocentric path from 2058-04-29 to 2058-05-05, 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 south 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 |
|---|---|---|---|---|
| 2027-04-19 07:07:00 | Mercury | 0.0479 AU | 18.7 LD | 18.2 km/s |
| 2027-04-19 07:07:00 | Merc | 0.0479 AU | 18.7 LD | 18.2 km/s |
| 2031-11-21 07:33:00 | Mercury | 0.091 AU | 35.4 LD | 28.1 km/s |
| 2031-11-21 07:33:00 | Merc | 0.091 AU | 35.4 LD | 28.1 km/s |
| 2046-07-23 16:26:00 | Mercury | 0.0654 AU | 25.4 LD | 18.3 km/s |
| 2046-07-23 16:26:00 | Merc | 0.0654 AU | 25.4 LD | 18.3 km/s |
| 2051-02-26 03:15:00 | Mercury | 0.0643 AU | 25.0 LD | 25.1 km/s |
| 2051-02-26 03:15:00 | Merc | 0.0643 AU | 25.0 LD | 25.1 km/s |
| 2058-05-02 23:46:00 | Earth | 0.1999 AU | 77.8 LD | 23.5 km/s |
| 2065-10-27 10:46:00 | Mercury | 0.0772 AU | 30.1 LD | 18.8 km/s |
Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.
Sources
- visual properties: JPL SBDB (lookup)
- physical properties: JPL SBDB (lookup)
- visual properties: JPL SBDB (lookup)
- orbital elements: JPL SBDB