SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 UN5

2013 UN5

2013 UN5 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.693 AU once every 2.20 yr.

Amor Observations: 34
Orbital Period · P
2.20 yr
v(q)
31.1 km/s
v(Q)
16.9 km/s
Diameter · ≈
0.08 km
TJ
4.11
Eccentricity · e
0.2964

Orbit and dynamics

The path is an ellipse reaching 1.191 AU from the Sun at perihelion and 2.195 AU at aphelion, a radial span of 1.004 AU.

Applying Kepler's third law to a = 1.693 AU gives an orbital period of 2.20 yr, or about 805 days.

An eccentricity of 0.296 makes the orbit moderately elongated.

The orbital plane is tilted 18.07° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.1 km/s at perihelion and falls to 16.9 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 = 23.24 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 34 observations and has a weighted RMS residual of 0.3592 arcseconds.

Condition code U = 0 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
1.693 AU
Eccentricity
0.2964
Perihelion
1.191 AU
Aphelion
2.194805 AU
Inclination
18.07°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
254.8°

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
2035-Oct-24 17:21 0.279253 AU
41775688 km
9.79 km/s
2046-Oct-21 15:44 0.337631 AU
50508885 km
9.98 km/s
2057-Oct-17 00:19 0.408209 AU
61067140 km
10.11 km/s
2068-Oct-09 14:25 0.485776 AU
72671128 km
9.87 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
23.24

Orbit Quality

RMS
0.35921
Condition
0
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

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