SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 XJ3

2020 XJ3

2020 XJ3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.807 AU and a period of 0.73 yr.

Aten Observations: 62
Orbital Period · P
0.73 yr
v(q)
43.5 km/s
v(Q)
25.3 km/s
Diameter · ≈
0.03 km
TJ
7.2
Eccentricity · e
0.2652

Orbit and dynamics

The path is an ellipse reaching 0.593 AU from the Sun at perihelion and 1.021 AU at aphelion, a radial span of 0.428 AU.

Applying Kepler's third law to a = 0.807 AU gives an orbital period of 0.73 yr, or about 265 days.

An eccentricity of 0.265 makes the orbit moderately elongated.

The orbital plane is tilted 5.56° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 43.5 km/s at perihelion and falls to 25.3 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 = 25.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 62 observations and has a weighted RMS residual of 0.2813 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
0.8071 AU
Eccentricity
0.2652
Perihelion
0.593 AU
Aphelion
1.021143 AU
Inclination
5.56°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
54.35°

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
2028-Aug-13 03:01 0.309465 AU
46295366 km
7.83 km/s
2028-Dec-28 04:29 0.112042 AU
16761308 km
10.45 km/s
2031-May-29 01:19 0.421681 AU
63082573 km
14.43 km/s
2033-Oct-29 16:20 0.122534 AU
18330829 km
9.58 km/s
2034-Mar-10 19:02 0.299534 AU
44809640 km
6.97 km/s
2036-Jul-20 18:57 0.358540 AU
53636747 km
10.96 km/s
2036-Dec-24 04:15 0.249395 AU
37308946 km
15.48 km/s
2039-May-11 12:45 0.414469 AU
62003688 km
13.98 km/s
2044-Jul-01 16:23 0.389429 AU
58257685 km
12.92 km/s
2044-Dec-18 15:39 0.380849 AU
56974230 km
20.35 km/s
2046-Nov-06 10:36 0.366960 AU
54896473 km
19.46 km/s
2047-Apr-24 09:49 0.392002 AU
58642629 km
12.73 km/s
2049-Dec-22 16:30 0.008698 AU
1301164 km
6.14 km/s
2052-Jun-19 10:45 0.407967 AU
61030926 km
13.69 km/s
2054-Nov-03 18:05 0.349035 AU
52214820 km
17.32 km/s
2055-Apr-16 11:14 0.383357 AU
57349318 km
11.89 km/s
2057-Dec-25 08:35 0.009628 AU
1440395 km
6.64 km/s
2060-Jun-11 17:53 0.411901 AU
61619531 km
14.19 km/s
2062-Oct-31 23:39 0.186438 AU
27890741 km
13.38 km/s
2063-Mar-30 11:36 0.339859 AU
50842203 km
9.79 km/s
2065-Dec-27 10:46 0.093454 AU
13980502 km
12.20 km/s
2073-Dec-21 08:49 0.209087 AU
31279025 km
18.31 km/s
2075-Nov-09 04:41 0.296707 AU
44386769 km
21.27 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
25.7

Orbit Quality

RMS
0.28126
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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