SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 FG39

2016 FG39

2016 FG39 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.244 AU it takes 1.39 yr to circle the Sun.

Apollo Observations: 32
Orbital Period · P
1.39 yr
v(q)
35.9 km/s
v(Q)
19.9 km/s
Diameter · ≈
0.01 km
TJ
5.12
Eccentricity · e
0.287

Orbit and dynamics

Between its closest point (0.887 AU) and its farthest (1.601 AU), the heliocentric distance changes by 0.714 AU over every revolution.

One full revolution takes 1.39 yr (507 days), computed from the semi-major axis of 1.244 AU.

An eccentricity of 0.287 makes the orbit moderately elongated.

Its inclination of 3.23° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.9 km/s at perihelion and falls to 19.9 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 = 26.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 32 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4783 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
1.244 AU
Eccentricity
0.287
Perihelion
0.887 AU
Aphelion
1.601028 AU
Inclination
3.23°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
80.62°

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-Jan-28 15:08 0.451682 AU
67570643 km
8.45 km/s
2027-Aug-31 14:14 0.075737 AU
11330021 km
13.40 km/s
2045-Sep-13 10:19 0.415151 AU
62105715 km
21.24 km/s
2048-Mar-12 20:51 0.403802 AU
60407952 km
22.16 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
26.9

Orbit Quality

RMS
0.47832
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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