SpaceAtlas Space Object Data
NASA JPL SBDB · 2000 UR16

2000 UR16

2000 UR16 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.905 AU and a period of 0.86 yr.

Aten Observations: 60
Orbital Period · P
0.86 yr
v(q)
50.1 km/s
v(Q)
19.6 km/s
Diameter · ≈
0.06 km
TJ
6.49
Eccentricity · e
0.4388

Orbit and dynamics

Between its closest point (0.508 AU) and its farthest (1.302 AU), the heliocentric distance changes by 0.794 AU over every revolution.

One full revolution takes 0.86 yr (314 days), computed from the semi-major axis of 0.905 AU.

The high eccentricity (0.439) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.75° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 50.1 km/s at perihelion and falls to 19.6 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 = 23.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 60 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4858 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
0.9047 AU
Eccentricity
0.4388
Perihelion
0.508 AU
Aphelion
1.301682 AU
Inclination
11.75°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
9.32°

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-09 05:00 0.192929 AU
28861769 km
15.33 km/s
2031-Nov-06 21:58 0.203578 AU
30454843 km
10.55 km/s
2033-Feb-14 17:02 0.193304 AU
28917849 km
10.99 km/s
2037-Oct-25 09:33 0.058744 AU
8788030 km
11.40 km/s
2043-Oct-24 14:09 0.011568 AU
1730617 km
14.27 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
23.9

Orbit Quality

RMS
0.48577
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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