SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 AM1

2021 AM1

2021 AM1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.375 AU it takes 1.61 yr to circle the Sun.

Apollo Observations: 22
Orbital Period · P
1.61 yr
v(q)
40.5 km/s
v(Q)
15.9 km/s
Diameter · ≈
0.06 km
TJ
4.53
Eccentricity · e
0.4365

Orbit and dynamics

The path is an ellipse reaching 0.775 AU from the Sun at perihelion and 1.975 AU at aphelion, a radial span of 1.2 AU.

Applying Kepler's third law to a = 1.375 AU gives an orbital period of 1.61 yr, or about 589 days.

The high eccentricity (0.436) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 36.29° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 40.5 km/s at perihelion and falls to 15.9 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 = 24.01 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 22 observations and has a weighted RMS residual of 0.4419 arcseconds.

Condition code U = 8 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
1.375 AU
Eccentricity
0.4365
Perihelion
0.775 AU
Aphelion
1.975188 AU
Inclination
36.29°
Orbital Period
— yr
Epoch
2459220.5
Mean Anomaly
40.19°

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
24.01

Orbit Quality

RMS
0.44185
Condition
8
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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