SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 DM4

2020 DM4

2020 DM4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.888 AU once every 2.59 yr.

Amor Observations: 355
Orbital Period · P
2.59 yr
v(q)
35.5 km/s
v(Q)
13.3 km/s
Diameter · ≈
0.16 km
TJ
3.83
Eccentricity · e
0.4557

Orbit and dynamics

The path is an ellipse reaching 1.027 AU from the Sun at perihelion and 2.748 AU at aphelion, a radial span of 1.721 AU.

Applying Kepler's third law to a = 1.888 AU gives an orbital period of 2.59 yr, or about 948 days.

The high eccentricity (0.456) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.11° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.5 km/s at perihelion and falls to 13.3 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 21.73 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

The current orbit solution is based on 355 observations and has a weighted RMS residual of 0.4212 arcseconds.

Condition code U = 4 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
1.888 AU
Eccentricity
0.4557
Perihelion
1.027 AU
Aphelion
2.748362 AU
Inclination
4.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
124.21°

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
2033-Apr-03 20:16 0.164008 AU
24535232 km
11.28 km/s
2077-Jun-13 12:22 0.118297 AU
17697048 km
9.02 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
21.73

Orbit Quality

RMS
0.42117
Condition
4
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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