SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 JM7

2021 JM7

2021 JM7 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.956 AU and a period of 0.93 yr.

Aten Observations: 20
Orbital Period · P
0.93 yr
v(q)
36.7 km/s
v(Q)
25.3 km/s
Diameter · ≈
0.06 km
TJ
6.12
Eccentricity · e
0.1854

Orbit and dynamics

The path is an ellipse reaching 0.779 AU from the Sun at perihelion and 1.133 AU at aphelion, a radial span of 0.354 AU.

Applying Kepler's third law to a = 0.956 AU gives an orbital period of 0.93 yr, or about 341 days.

An eccentricity of 0.185 makes the orbit moderately elongated.

A steep inclination of 36.42° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 36.7 km/s at perihelion and falls to 25.3 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 = 23.91 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 20 observations and has a weighted RMS residual of 0.2982 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
0.9558 AU
Eccentricity
0.1854
Perihelion
0.779 AU
Aphelion
1.133005 AU
Inclination
36.42°
Orbital Period
— yr
Epoch
2459349.5
Mean Anomaly
214.5°

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
23.91

Orbit Quality

RMS
0.2982
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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