SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 UE2

2020 UE2

2020 UE2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.878 AU and a period of 0.82 yr.

Aten Observations: 16
Orbital Period · P
0.82 yr
v(q)
39.4 km/s
v(Q)
25.7 km/s
Diameter · ≈
0.02 km
TJ
6.73
Eccentricity · e
0.2105

Orbit and dynamics

The path is an ellipse reaching 0.693 AU from the Sun at perihelion and 1.062 AU at aphelion, a radial span of 0.369 AU.

Applying Kepler's third law to a = 0.878 AU gives an orbital period of 0.82 yr, or about 300 days.

An eccentricity of 0.21 makes the orbit moderately elongated.

Its inclination of 2.48° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.4 km/s at perihelion and falls to 25.7 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 = 26.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 16 observations and has a weighted RMS residual of 0.46 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
0.8776 AU
Eccentricity
0.2105
Perihelion
0.693 AU
Aphelion
1.062335 AU
Inclination
2.48°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
82.34°

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-Oct-11 00:58 0.255613 AU
38239167 km
14.56 km/s
2030-May-05 09:09 0.312594 AU
46763385 km
9.82 km/s
2039-Jun-11 12:03 0.306564 AU
45861329 km
9.46 km/s
2039-Dec-30 01:36 0.208561 AU
31200343 km
13.43 km/s
2043-Oct-06 19:52 0.074585 AU
11157750 km
9.35 km/s
2044-Apr-09 11:17 0.278847 AU
41714908 km
8.61 km/s
2048-Jul-21 08:12 0.243720 AU
36460011 km
6.43 km/s
2048-Dec-31 21:38 0.040327 AU
6032823 km
5.77 km/s
2052-Oct-12 21:57 0.287223 AU
42967924 km
16.12 km/s
2053-May-11 14:48 0.316591 AU
47361366 km
9.97 km/s
2053-Dec-21 04:02 0.418358 AU
62585531 km
20.31 km/s
2061-Oct-18 17:04 0.424972 AU
63574975 km
20.70 km/s
2062-Jun-01 07:04 0.314778 AU
47090091 km
9.83 km/s
2062-Dec-26 16:57 0.278241 AU
41624240 km
15.88 km/s
2066-Oct-09 18:21 0.008011 AU
1198501 km
5.52 km/s
2079-Oct-17 15:19 0.409365 AU
61240147 km
19.66 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
26.6

Orbit Quality

RMS
0.45998
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.

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