SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 UU68

2012 UU68

2012 UU68 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.941 AU and a period of 0.91 yr.

Aten Observations: 112
Orbital Period · P
0.91 yr
v(q)
38.7 km/s
v(Q)
24.3 km/s
Diameter · ≈
0.09 km
TJ
6.35
Eccentricity · e
0.2287

Orbit and dynamics

Between its closest point (0.726 AU) and its farthest (1.156 AU), the heliocentric distance changes by 0.43 AU over every revolution.

One full revolution takes 0.91 yr (333 days), computed from the semi-major axis of 0.941 AU.

An eccentricity of 0.229 makes the orbit moderately elongated.

The orbital plane is tilted 5.45° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38.7 km/s at perihelion and falls to 24.3 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 = 23.07 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 112 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4706 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
0.941 AU
Eccentricity
0.2287
Perihelion
0.726 AU
Aphelion
1.156207 AU
Inclination
5.45°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
245.9°

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
2031-Jul-06 04:09 0.303445 AU
45394665 km
15.22 km/s
2032-Apr-25 21:20 0.209979 AU
31412451 km
6.46 km/s
2032-Aug-22 21:17 0.173325 AU
25929049 km
5.20 km/s
2033-Jan-18 01:15 0.247983 AU
37097747 km
7.24 km/s
2033-Oct-24 19:33 0.225713 AU
33766240 km
13.42 km/s
2041-Jul-14 18:48 0.495369 AU
74106081 km
21.12 km/s
2042-Jun-20 10:17 0.085605 AU
12806374 km
5.60 km/s
2043-Feb-23 15:54 0.273802 AU
40960129 km
8.77 km/s
2043-Oct-31 17:36 0.026060 AU
3898548 km
7.55 km/s
2052-Jun-23 04:44 0.078565 AU
11753132 km
6.92 km/s
2053-Mar-02 13:00 0.274649 AU
41086933 km
8.86 km/s
2053-Oct-31 11:19 0.008061 AU
1205928 km
6.70 km/s
2062-Jul-10 01:32 0.420140 AU
62852113 km
18.80 km/s
2063-Jun-11 16:35 0.122306 AU
18296745 km
4.25 km/s
2064-Feb-15 11:44 0.269693 AU
40345539 km
8.49 km/s
2064-Oct-30 04:42 0.056735 AU
8487452 km
8.43 km/s
2073-Jul-03 04:23 0.274243 AU
41026241 km
14.29 km/s
2074-Apr-20 20:53 0.216621 AU
32405966 km
6.74 km/s
2074-Aug-27 14:37 0.174429 AU
26094276 km
5.26 km/s
2075-Jan-14 23:29 0.242267 AU
36242621 km
6.93 km/s
2075-Oct-24 18:45 0.230164 AU
34432081 km
13.53 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
23.07

Orbit Quality

RMS
0.47059
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.

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