SpaceAtlas Space Object Data
NASA JPL SBDB · 2000 UK11

2000 UK11

2000 UK11 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.883 AU and a period of 0.83 yr.

Aten Observations: 69
Orbital Period · P
0.83 yr
v(q)
40.8 km/s
v(Q)
24.6 km/s
Diameter · ≈
0.03 km
TJ
6.69
Eccentricity · e
0.2485

Orbit and dynamics

Between its closest point (0.664 AU) and its farthest (1.103 AU), the heliocentric distance changes by 0.439 AU over every revolution.

One full revolution takes 0.83 yr (303 days), computed from the semi-major axis of 0.883 AU.

An eccentricity of 0.248 makes the orbit moderately elongated.

Its inclination of 0.79° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.8 km/s at perihelion and falls to 24.6 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 = 25.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 69 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3577 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
0.8833 AU
Eccentricity
0.2485
Perihelion
0.664 AU
Aphelion
1.1028 AU
Inclination
0.79°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
192.5°

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-Aug-02 03:54 0.020431 AU
3056469 km
5.84 km/s
2030-Jan-24 20:49 0.282593 AU
42275263 km
8.30 km/s
2034-Sep-11 22:08 0.097200 AU
14540848 km
5.05 km/s
2034-Dec-23 01:34 0.215336 AU
32213753 km
4.44 km/s
2039-May-14 15:54 0.272479 AU
40762269 km
7.25 km/s
2039-Oct-25 14:39 0.047675 AU
7132082 km
5.07 km/s
2044-Apr-22 23:57 0.305982 AU
45774312 km
9.19 km/s
2044-Nov-02 05:27 0.066321 AU
9921419 km
8.31 km/s
2048-Aug-10 17:33 0.425922 AU
63717077 km
19.48 km/s
2049-Mar-31 11:41 0.328168 AU
49093300 km
10.60 km/s
2049-Oct-29 15:02 0.220102 AU
32926864 km
13.17 km/s
2053-Aug-06 04:18 0.307662 AU
46025634 km
15.80 km/s
2054-Mar-15 23:15 0.331598 AU
49606411 km
10.94 km/s
2054-Oct-25 09:58 0.334414 AU
50027654 km
16.78 km/s
2058-Aug-02 12:28 0.199042 AU
29776268 km
12.44 km/s
2059-Feb-28 23:30 0.325905 AU
48754647 km
10.71 km/s
2059-Oct-21 00:36 0.443624 AU
66365208 km
20.19 km/s
2063-Jul-31 01:07 0.090703 AU
13569038 km
9.07 km/s
2064-Feb-13 04:46 0.310422 AU
46438471 km
9.85 km/s
2068-Aug-01 12:05 0.020598 AU
3081477 km
5.89 km/s
2069-Jan-25 03:55 0.283730 AU
42445363 km
8.37 km/s
2073-Sep-10 03:30 0.096939 AU
14501826 km
5.04 km/s
2073-Dec-23 21:35 0.216887 AU
32445802 km
4.60 km/s
2078-May-13 18:43 0.272469 AU
40760711 km
7.30 km/s
2078-Oct-25 17:36 0.042377 AU
6339436 km
5.13 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
25.3

Orbit Quality

RMS
0.3577
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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