SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 FC12

2016 FC12

2016 FC12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.582 AU it takes 1.99 yr to circle the Sun.

Apollo Observations: 33
Orbital Period · P
1.99 yr
v(q)
37.6 km/s
v(Q)
14.9 km/s
Diameter · ≈
0.04 km
TJ
4.25
Eccentricity · e
0.4314

Orbit and dynamics

Between its closest point (0.9 AU) and its farthest (2.264 AU), the heliocentric distance changes by 1.364 AU over every revolution.

One full revolution takes 1.99 yr (727 days), computed from the semi-major axis of 1.582 AU.

The high eccentricity (0.431) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 14.7° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.6 km/s at perihelion and falls to 14.9 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 = 24.72 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 33 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3997 arcseconds.

Condition code U = 1 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
1.582 AU
Eccentricity
0.4314
Perihelion
0.9 AU
Aphelion
2.264475 AU
Inclination
14.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
76.13°

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-Nov-11 12:50 0.211041 AU
31571328 km
10.06 km/s
2029-Nov-08 15:29 0.205918 AU
30804888 km
11.67 km/s
2031-Nov-06 11:03 0.220856 AU
33039550 km
13.44 km/s
2032-Mar-21 20:13 0.493131 AU
73771290 km
7.68 km/s
2033-Nov-03 07:36 0.254642 AU
38093842 km
15.22 km/s
2035-Oct-31 16:17 0.304495 AU
45551843 km
17.27 km/s
2037-Oct-27 23:42 0.361975 AU
54150716 km
19.32 km/s
2039-Oct-25 05:54 0.426965 AU
63873067 km
21.43 km/s
2041-Oct-21 07:27 0.496558 AU
74283960 km
23.64 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
24.72

Orbit Quality

RMS
0.39969
Condition
1
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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