SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 UU56

2014 UU56

2014 UU56 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.103 AU it takes 1.16 yr to circle the Sun.

Apollo Observations: 22
Orbital Period · P
1.16 yr
v(q)
37.1 km/s
v(Q)
21.7 km/s
Diameter · ≈
0.01 km
TJ
5.61
Eccentricity · e
0.2626

Orbit and dynamics

The path is an ellipse reaching 0.813 AU from the Sun at perihelion and 1.393 AU at aphelion, a radial span of 0.58 AU.

Applying Kepler's third law to a = 1.103 AU gives an orbital period of 1.16 yr, or about 423 days.

An eccentricity of 0.263 makes the orbit moderately elongated.

Its inclination of 0.32° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 37.1 km/s at perihelion and falls to 21.7 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 = 28.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 22 observations and has a weighted RMS residual of 0.4153 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
1.103 AU
Eccentricity
0.2626
Perihelion
0.813 AU
Aphelion
1.392648 AU
Inclination
0.32°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
71.94°

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
2029-Jan-01 16:29 0.383754 AU
57408735 km
8.24 km/s
2029-Nov-05 00:15 0.317825 AU
47545918 km
18.74 km/s
2035-Apr-18 16:53 0.130088 AU
19460839 km
13.20 km/s
2036-Jan-27 15:56 0.405419 AU
60649875 km
8.57 km/s
2036-Oct-21 22:47 0.013831 AU
2069108 km
9.77 km/s
2042-Apr-06 20:43 0.431819 AU
64599131 km
21.07 km/s
2043-Feb-19 14:44 0.370380 AU
55408005 km
7.88 km/s
2043-Sep-02 06:12 0.163661 AU
24483274 km
6.53 km/s
2043-Nov-05 00:08 0.200270 AU
29959979 km
4.15 km/s
2050-Mar-23 08:49 0.235510 AU
35231798 km
5.74 km/s
2050-Dec-17 08:23 0.329751 AU
49329992 km
7.51 km/s
2057-Apr-29 02:31 0.001447 AU
216509 km
7.52 km/s
2058-Jan-09 11:45 0.386104 AU
57760322 km
8.48 km/s
2058-Nov-01 17:52 0.271957 AU
40684174 km
16.61 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
28.6

Orbit Quality

RMS
0.41526
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.