SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 UE101

2016 UE101

2016 UE101 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.677 AU once every 2.17 yr.

Amor Observations: 239
Orbital Period · P
2.17 yr
v(q)
33.2 km/s
v(Q)
15.9 km/s
Diameter · ≈
0.22 km
TJ
4.15
Eccentricity · e
0.3513

Orbit and dynamics

The path is an ellipse reaching 1.088 AU from the Sun at perihelion and 2.266 AU at aphelion, a radial span of 1.178 AU.

Applying Kepler's third law to a = 1.677 AU gives an orbital period of 2.17 yr, or about 793 days.

An eccentricity of 0.351 makes the orbit moderately elongated.

The orbital plane is tilted 11.45° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.2 km/s at perihelion and falls to 15.9 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 = 21.06 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.22 km.

Observation record and orbit quality

The current orbit solution is based on 239 observations and has a weighted RMS residual of 0.3734 arcseconds.

Condition code U = 1 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.677 AU
Eccentricity
0.3513
Perihelion
1.088 AU
Aphelion
2.26613 AU
Inclination
11.45°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
111.53°

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
2029-Dec-31 13:00 0.263172 AU
39369979 km
6.17 km/s
2042-Dec-04 00:09 0.458828 AU
68639637 km
6.00 km/s
2053-Dec-26 19:19 0.441015 AU
65974954 km
15.44 km/s
2054-Apr-01 13:43 0.465080 AU
69574977 km
3.44 km/s
2067-Jan-03 00:41 0.229028 AU
34262154 km
9.92 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
21.06

Orbit Quality

RMS
0.37336
Condition
1
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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