SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 ED4

2017 ED4

2017 ED4 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.804 AU once every 2.42 yr.

Amor Observations: 100
Orbital Period · P
2.42 yr
v(q)
35.2 km/s
v(Q)
14 km/s
Diameter · ≈
0.44 km
TJ
3.84
Eccentricity · e
0.4323

Orbit and dynamics

The path is an ellipse reaching 1.024 AU from the Sun at perihelion and 2.584 AU at aphelion, a radial span of 1.56 AU.

Applying Kepler's third law to a = 1.804 AU gives an orbital period of 2.42 yr, or about 885 days.

The high eccentricity (0.432) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 26.14° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.2 km/s at perihelion and falls to 14 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 19.54 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.44 km.

Observation record and orbit quality

The current orbit solution is based on 100 observations and has a weighted RMS residual of 0.5676 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
1.804 AU
Eccentricity
0.4323
Perihelion
1.024 AU
Aphelion
2.583869 AU
Inclination
26.14°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
301.91°

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
2034-Feb-12 03:47 0.173387 AU
25938347 km
16.75 km/s
2051-Jan-31 08:06 0.062147 AU
9297039 km
15.54 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
19.54

Orbit Quality

RMS
0.56763
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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