SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 ME5

2018 ME5

2018 ME5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.405 AU it takes 1.67 yr to circle the Sun.

Apollo Observations: 76
Orbital Period · P
1.67 yr
v(q)
34.4 km/s
v(Q)
18.4 km/s
Diameter · ≈
0.09 km
TJ
4.69
Eccentricity · e
0.3034

Orbit and dynamics

The path is an ellipse reaching 0.979 AU from the Sun at perihelion and 1.831 AU at aphelion, a radial span of 0.852 AU.

Applying Kepler's third law to a = 1.405 AU gives an orbital period of 1.67 yr, or about 608 days.

An eccentricity of 0.303 makes the orbit moderately elongated.

The orbital plane is tilted 7.41° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.4 km/s at perihelion and falls to 18.4 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 = 22.95 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 76 observations and has a weighted RMS residual of 0.451 arcseconds.

Condition code U = 0 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
1.405 AU
Eccentricity
0.3034
Perihelion
0.979 AU
Aphelion
1.831277 AU
Inclination
7.41°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
236.19°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2028-Jul-23 00:06 0.099522 AU
14888282 km
9.13 km/s
2028-Nov-22 14:45 0.317846 AU
47549150 km
4.04 km/s
2033-Jul-19 23:51 0.140717 AU
21050904 km
10.45 km/s
2033-Dec-01 07:37 0.352094 AU
52672561 km
4.98 km/s
2038-Jul-15 23:50 0.206791 AU
30935503 km
12.38 km/s
2038-Dec-10 10:51 0.397903 AU
59525450 km
5.96 km/s
2043-Jul-11 20:37 0.287351 AU
42987146 km
14.67 km/s
2043-Dec-18 21:33 0.446135 AU
66740865 km
6.85 km/s
2048-Jul-06 11:51 0.376815 AU
56370649 km
17.23 km/s
2048-Dec-25 16:56 0.494198 AU
73930926 km
7.64 km/s
2053-Jul-01 22:51 0.471398 AU
70520208 km
19.91 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
22.95

Orbit Quality

RMS
0.45103
Condition
0
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.

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