SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 EN2

2021 EN2

2021 EN2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.414 AU it takes 1.68 yr to circle the Sun.

Apollo Observations: 45
Orbital Period · P
1.68 yr
v(q)
33.9 km/s
v(Q)
18.5 km/s
Diameter · ≈
0.06 km
TJ
4.61
Eccentricity · e
0.2939

Orbit and dynamics

Between its closest point (0.998 AU) and its farthest (1.83 AU), the heliocentric distance changes by 0.832 AU over every revolution.

One full revolution takes 1.68 yr (614 days), computed from the semi-major axis of 1.414 AU.

An eccentricity of 0.294 makes the orbit moderately elongated.

A steep inclination of 20.73° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 33.9 km/s at perihelion and falls to 18.5 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 = 23.95 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 45 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4404 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
1.414 AU
Eccentricity
0.2939
Perihelion
0.998 AU
Aphelion
1.829575 AU
Inclination
20.73°
Orbital Period
— yr
Epoch
2459283.5
Mean Anomaly
36.73°

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
23.95

Orbit Quality

RMS
0.44036
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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