SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 XH1

2020 XH1

2020 XH1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.031 AU it takes 2.89 yr to circle the Sun.

Apollo Observations: 232
Orbital Period · P
2.89 yr
v(q)
40.7 km/s
v(Q)
10.7 km/s
Diameter · ≈
0.09 km
TJ
3.58
Eccentricity · e
0.5822

Orbit and dynamics

The path is an ellipse reaching 0.849 AU from the Sun at perihelion and 3.213 AU at aphelion, a radial span of 2.364 AU.

Applying Kepler's third law to a = 2.031 AU gives an orbital period of 2.89 yr, or about 1,057 days.

The high eccentricity (0.582) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.76° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.7 km/s at perihelion and falls to 10.7 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 = 22.98 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 232 observations and has a weighted RMS residual of 0.4628 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
2.031 AU
Eccentricity
0.5822
Perihelion
0.849 AU
Aphelion
3.213448 AU
Inclination
0.76°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
337.0°

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
2046-Dec-25 06:20 0.285694 AU
42739256 km
21.68 km/s
2049-Sep-19 12:48 0.132491 AU
19820425 km
10.56 km/s
2052-Jul-16 23:02 0.469859 AU
70289864 km
26.90 km/s
2075-Dec-04 23:16 0.012934 AU
1934950 km
12.88 km/s
2078-Aug-13 18:35 0.053356 AU
7981922 km
14.37 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
22.98

Orbit Quality

RMS
0.46277
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.

Keep exploring

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