SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 XC

2020 XC

2020 XC is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.936 AU and a period of 0.91 yr.

Aten Observations: 53
Orbital Period · P
0.91 yr
v(q)
34.4 km/s
v(Q)
27.6 km/s
Diameter · ≈
0.01 km
TJ
6.4
Eccentricity · e
0.1093

Orbit and dynamics

Between its closest point (0.834 AU) and its farthest (1.039 AU), the heliocentric distance changes by 0.205 AU over every revolution.

One full revolution takes 0.91 yr (331 days), computed from the semi-major axis of 0.936 AU.

An eccentricity of 0.109 makes the orbit moderately elongated.

Its inclination of 2.53° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 27.6 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 = 29.04 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 53 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4979 arcseconds.

Condition code U = 5 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
0.9364 AU
Eccentricity
0.1093
Perihelion
0.834 AU
Aphelion
1.038749 AU
Inclination
2.53°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
148.77°

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-Dec-07 00:16 0.365309 AU
54649496 km
14.79 km/s
2030-Sep-05 23:07 0.162325 AU
24283533 km
4.12 km/s
2031-Mar-18 02:41 0.042229 AU
6317430 km
3.64 km/s
2039-Nov-28 18:41 0.035868 AU
5365716 km
5.03 km/s
2040-Jun-19 14:14 0.165678 AU
24785084 km
4.64 km/s
2041-Mar-10 18:02 0.312253 AU
46712433 km
13.13 km/s
2048-Dec-11 01:22 0.434736 AU
65035541 km
17.66 km/s
2051-Mar-04 00:39 0.456692 AU
68320138 km
18.38 km/s
2058-Dec-04 00:48 0.233677 AU
34957550 km
12.14 km/s
2060-Mar-17 21:54 0.053214 AU
7960767 km
5.99 km/s
2068-Nov-27 20:42 0.028999 AU
4338175 km
5.13 km/s
2069-Jun-21 14:24 0.163584 AU
24471809 km
4.63 km/s
2070-Mar-11 22:04 0.299172 AU
44755517 km
12.82 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
29.04

Orbit Quality

RMS
0.49786
Condition
5
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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