SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 DF2

2021 DF2

2021 DF2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.548 AU once every 1.93 yr.

Amor Observations: 19
Orbital Period · P
1.93 yr
v(q)
30.8 km/s
v(Q)
18.6 km/s
Diameter · ≈
0.06 km
TJ
4.41
Eccentricity · e
0.2455

Orbit and dynamics

The path is an ellipse reaching 1.168 AU from the Sun at perihelion and 1.928 AU at aphelion, a radial span of 0.76 AU.

Applying Kepler's third law to a = 1.548 AU gives an orbital period of 1.93 yr, or about 703 days.

An eccentricity of 0.245 makes the orbit moderately elongated.

The orbital plane is tilted 6.01° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.8 km/s at perihelion and falls to 18.6 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 = 23.88 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

The current orbit solution is based on 19 observations and has a weighted RMS residual of 0.5077 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
1.548 AU
Eccentricity
0.2455
Perihelion
1.168 AU
Aphelion
1.928034 AU
Inclination
6.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
274.6°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
23.88

Orbit Quality

RMS
0.50773
Condition
7
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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