SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 OU3

2023 OU3

2023 OU3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.225 AU it takes 1.36 yr to circle the Sun.

Apollo Observations: 22
Orbital Period · P
1.36 yr
v(q)
32.4 km/s
v(Q)
22.3 km/s
Diameter · ≈
0.02 km
TJ
5.17
Eccentricity · e
0.1848

Orbit and dynamics

Between its closest point (0.999 AU) and its farthest (1.451 AU), the heliocentric distance changes by 0.452 AU over every revolution.

One full revolution takes 1.36 yr (495 days), computed from the semi-major axis of 1.225 AU.

An eccentricity of 0.185 makes the orbit moderately elongated.

The orbital plane is tilted 13.88° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.4 km/s at perihelion and falls to 22.3 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.95 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 22 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6998 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

About these computed values

Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Orbital Parameters

Semi-Major Axis
1.225 AU
Eccentricity
0.1848
Perihelion
0.999 AU
Aphelion
1.45138 AU
Inclination
13.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
68.31°

Orbit diagram

The Sun sits at the focus (orange). Earth's orbit is the grey circle at 1 AU. The red dot marks the object's position at the catalog epoch.

3D orbit (interactive)

Drag to rotate; scroll or pinch to zoom. The Sun is at the focus (orange), Earth's orbit is the grey ring at 1 AU, and the red dot marks the object's current position.

Close approaches

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2027-Feb-04 04:10 0.374325 AU
55998150 km
9.06 km/s
2027-Aug-16 12:04 0.371631 AU
55595230 km
17.08 km/s
2031-Jan-05 22:46 0.449594 AU
67258264 km
9.89 km/s
2034-Dec-08 00:51 0.495504 AU
74126385 km
9.26 km/s
2072-Dec-29 19:32 0.468243 AU
70048195 km
9.88 km/s
2076-Nov-30 06:44 0.495444 AU
74117318 km
8.87 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
25.95

Orbit Quality

RMS
0.69983
Condition
7
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. Orbital periods, perihelion and aphelion speeds, and diameter estimates on this page are computed by SpaceAtlas from the JPL SBDB orbital elements. They are derived quantities, not values copied from the source catalogue.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.