SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 OK3

2005 OK3

2005 OK3 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.143 AU once every 3.14 yr.

Amor Observations: 140
Orbital Period · P
3.14 yr
v(q)
35.4 km/s
v(Q)
11.7 km/s
Diameter · ≈
0.18 km
TJ
3.53
Eccentricity · e
0.5026

Orbit and dynamics

Between its closest point (1.066 AU) and its farthest (3.22 AU), the heliocentric distance changes by 2.154 AU over every revolution.

One full revolution takes 3.14 yr (1,146 days), computed from the semi-major axis of 2.143 AU.

The high eccentricity (0.503) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.73° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.4 km/s at perihelion and falls to 11.7 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 21.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

Astrometry from 140 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4482 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
2.143 AU
Eccentricity
0.5026
Perihelion
1.066 AU
Aphelion
3.220072 AU
Inclination
7.73°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
226.94°

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-Jul-18 20:34 0.116063 AU
17362735 km
10.82 km/s
2049-Jun-24 18:46 0.412738 AU
61744771 km
20.18 km/s
2052-Sep-24 11:07 0.267940 AU
40083292 km
15.44 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
21.5

Orbit Quality

RMS
0.44823
Condition
6
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.

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