SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 EJ85

2016 EJ85

2016 EJ85 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.374 AU it takes 1.61 yr to circle the Sun.

Apollo Observations: 82
Orbital Period · P
1.61 yr
v(q)
35.8 km/s
v(Q)
18 km/s
Diameter · ≈
0.02 km
TJ
4.75
Eccentricity · e
0.33

Orbit and dynamics

The path is an ellipse reaching 0.921 AU from the Sun at perihelion and 1.827 AU at aphelion, a radial span of 0.906 AU.

Applying Kepler's third law to a = 1.374 AU gives an orbital period of 1.61 yr, or about 588 days.

An eccentricity of 0.33 makes the orbit moderately elongated.

The orbital plane is tilted 6.57° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.8 km/s at perihelion and falls to 18 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 = 25.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 82 observations and has a weighted RMS residual of 0.4532 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
1.374 AU
Eccentricity
0.33
Perihelion
0.921 AU
Aphelion
1.82742 AU
Inclination
6.57°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
155.72°

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-Nov-05 01:33 0.402017 AU
60140958 km
20.88 km/s
2036-Nov-24 13:10 0.112981 AU
16901675 km
10.62 km/s
2052-Oct-12 05:52 0.407039 AU
60892209 km
6.76 km/s
2053-Mar-24 22:54 0.126386 AU
18907115 km
13.14 km/s
2061-Apr-10 09:12 0.462485 AU
69186780 km
21.60 km/s
2065-Nov-12 22:29 0.263319 AU
39391955 km
16.61 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
25.8

Orbit Quality

RMS
0.45322
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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