SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 ME4

2023 ME4

2023 ME4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.327 AU it takes 1.53 yr to circle the Sun.

Apollo Observations: 100
Orbital Period · P
1.53 yr
v(q)
33.1 km/s
v(Q)
20.2 km/s
Diameter · ≈
0.03 km
TJ
4.85
Eccentricity · e
0.2425

Orbit and dynamics

Between its closest point (1.005 AU) and its farthest (1.649 AU), the heliocentric distance changes by 0.644 AU over every revolution.

One full revolution takes 1.53 yr (558 days), computed from the semi-major axis of 1.327 AU.

An eccentricity of 0.242 makes the orbit moderately elongated.

The orbital plane is tilted 18.28° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.1 km/s at perihelion and falls to 20.2 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.36 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 100 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3272 arcseconds.

Condition code U = 6 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
1.327 AU
Eccentricity
0.2425
Perihelion
1.005 AU
Aphelion
1.648797 AU
Inclination
18.28°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
314.86°

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
2046-Jun-10 13:01 0.303444 AU
45394636 km
17.15 km/s
2046-Nov-24 12:38 0.477093 AU
71372146 km
9.82 km/s
2049-Jul-04 08:05 0.005128 AU
767171 km
10.79 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
25.36

Orbit Quality

RMS
0.3272
Condition
6
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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