SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 EO55

2016 EO55

2016 EO55 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.353 AU it takes 1.57 yr to circle the Sun.

Apollo Observations: 99
Orbital Period · P
1.57 yr
v(q)
34.1 km/s
v(Q)
19.2 km/s
Diameter · ≈
0.03 km
TJ
4.81
Eccentricity · e
0.2784

Orbit and dynamics

The path is an ellipse reaching 0.976 AU from the Sun at perihelion and 1.73 AU at aphelion, a radial span of 0.754 AU.

Applying Kepler's third law to a = 1.353 AU gives an orbital period of 1.57 yr, or about 575 days.

An eccentricity of 0.278 makes the orbit moderately elongated.

The orbital plane is tilted 10.01° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.1 km/s at perihelion and falls to 19.2 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 = 25.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 99 observations and has a weighted RMS residual of 0.4852 arcseconds.

Condition code U = 7 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
1.353 AU
Eccentricity
0.2784
Perihelion
0.976 AU
Aphelion
1.729675 AU
Inclination
10.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
206.68°

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
2027-Mar-13 08:08 0.031962 AU
4781415 km
9.18 km/s
2037-Oct-27 13:27 0.358877 AU
53687198 km
6.29 km/s
2038-Mar-25 00:57 0.184597 AU
27615300 km
13.62 km/s
2045-Dec-06 14:10 0.341759 AU
51126438 km
16.11 km/s
2048-Oct-11 06:33 0.442518 AU
66199762 km
7.91 km/s
2049-Apr-04 10:40 0.367173 AU
54928334 km
18.78 km/s
2079-Feb-27 10:02 0.013860 AU
2073381 km
6.68 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
25.1

Orbit Quality

RMS
0.48517
Condition
7
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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