SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 NG3

2015 NG3

2015 NG3 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.685 AU once every 2.19 yr.

Amor Observations: 20
Orbital Period · P
2.19 yr
v(q)
32.8 km/s
v(Q)
16.1 km/s
Diameter · ≈
0.16 km
TJ
4.04
Eccentricity · e
0.3415

Orbit and dynamics

Between its closest point (1.109 AU) and its farthest (2.26 AU), the heliocentric distance changes by 1.151 AU over every revolution.

One full revolution takes 2.19 yr (799 days), computed from the semi-major axis of 1.685 AU.

An eccentricity of 0.342 makes the orbit moderately elongated.

A steep inclination of 27.51° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32.8 km/s at perihelion and falls to 16.1 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 = 21.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.16 km.

Observation record and orbit quality

Astrometry from 20 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5697 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
1.685 AU
Eccentricity
0.3415
Perihelion
1.109 AU
Aphelion
2.260428 AU
Inclination
27.51°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
313.52°

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
2026-Nov-24 04:34 0.342010 AU
51163924 km
15.28 km/s
2037-Dec-03 09:50 0.419376 AU
62737816 km
14.05 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
21.7

Orbit Quality

RMS
0.56973
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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