2021 OZ is an asteroid in the Aten orbit class. Its orbit takes it from 0.9 AU to 1.05 AU from the Sun; one orbit takes 351.8 days. Orbit from the JPL solution of 12 December 2021.
Where is it now
- Distance from Sun
- 0.938 AU
- True anomaly
- 295°
- Distance from Earth
- 1 AU
- As of
- 24 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
- 10h 47m 59s
- Declination
- +18° 46′ 56″
- Constellation
- Leo
- Distance from Earth
- 1 AU
- Elongation from the Sun
- 56.07° — near the Sun — look low at dusk or dawn
Favours the northern hemisphere; low or below the horizon from far south.
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
- 0.975 AU
- Eccentricity
- 0.0788
- Inclination
- 17.86°
- Orbital period
- 351.8 days
- Perihelion
- 0.898 AU
- Aphelion
- 1.052 AU
- Longitude of ascending node
- 310.55°
- Argument of periapsis
- 206.1°
- Epoch · J2000
- 2461200.5
- Orbit class · ATE
- Aten
- Earth MOID · 10.8 LD
- 0.0277 AU
- Tisserand (Jupiter)
- 6.157
Orbit quality
Orbit poorly determined (uncertainty code 6).
- Observations used
- 154
- Data arc
- 39 days
- First observed
- 28 July 2021
- Last observed
- 5 September 2021
- Residual RMS
- 0.47 ″
- Solution · Otto Matic
- 12 December 2021
Visual & observation
- Absolute magnitude (H)
- 23.39
Discovery & classification
Close approaches 78 on record
Top-down view of the ecliptic, Earth at the centre, for the 2045-08-05 10:05 UTC close approach of 2021 OZ. Catalogue miss distance 181.6 LD · 6.98 × 10⁷ km. The curve is the geocentric path from 2045-08-02 to 2045-08-08, 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 |
|---|---|---|---|---|
| 2045-08-05 10:05:00 | Earth | 0.4666 AU | 181.6 LD | 17.6 km/s |
| 2046-08-02 06:45:00 | Earth | 0.2532 AU | 98.6 LD | 12.5 km/s |
| 2047-03-12 07:14:00 | Earth | 0.3044 AU | 118.5 LD | 11.4 km/s |
| 2047-08-02 09:03:00 | Earth | 0.0475 AU | 18.5 LD | 9.3 km/s |
| 2048-02-09 02:00:00 | Earth | 0.1211 AU | 47.1 LD | 10 km/s |
| 2048-08-05 08:48:00 | Earth | 0.1684 AU | 65.6 LD | 9.6 km/s |
| 2049-01-16 14:10:00 | Earth | 0.1384 AU | 53.9 LD | 10.9 km/s |
| 2049-08-13 04:24:00 | Earth | 0.3686 AU | 143.4 LD | 12.8 km/s |
| 2049-12-26 22:22:00 | Earth | 0.3358 AU | 130.7 LD | 14.5 km/s |
| 2072-08-04 12:33:00 | Earth | 0.4294 AU | 167.1 LD | 16.6 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