SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 JD3

2015 JD3

2015 JD3 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.059 AU once every 1.09 yr.

Amor Observations: 37
Orbital Period · P
1.09 yr
v(q)
29.2 km/s
v(Q)
28.7 km/s
Diameter · ≈
0.03 km
TJ
5.82
Eccentricity · e
0.0078

Orbit and dynamics

The path is an ellipse reaching 1.05 AU from the Sun at perihelion and 1.067 AU at aphelion, a radial span of 0.017 AU.

Applying Kepler's third law to a = 1.059 AU gives an orbital period of 1.09 yr, or about 398 days.

With e = 0.008, the orbit is close to circular.

Its inclination of 2.72° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 29.2 km/s at perihelion and falls to 28.7 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 = 25.5 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 37 observations and has a weighted RMS residual of 0.381 arcseconds.

Condition code U = 4 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
1.059 AU
Eccentricity
0.0078
Perihelion
1.05 AU
Aphelion
1.06726 AU
Inclination
2.72°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
189.46°

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-Sep-18 15:43 0.066658 AU
9971909 km
1.29 km/s
2039-Dec-04 05:56 0.067942 AU
10164039 km
1.61 km/s
2052-Apr-02 15:56 0.063487 AU
9497465 km
1.48 km/s
2064-Jun-05 09:46 0.058003 AU
8677163 km
1.39 km/s
2076-Oct-06 12:09 0.061098 AU
9140179 km
1.53 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
25.5

Orbit Quality

RMS
0.38101
Condition
4
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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