SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 JG12

2016 JG12

2016 JG12 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.303 AU it takes 1.49 yr to circle the Sun.

Apollo Observations: 241
Orbital Period · P
1.49 yr
v(q)
36.9 km/s
v(Q)
18.5 km/s
Diameter · ≈
0.11 km
TJ
4.93
Eccentricity · e
0.3322

Orbit and dynamics

Between its closest point (0.87 AU) and its farthest (1.736 AU), the heliocentric distance changes by 0.866 AU over every revolution.

One full revolution takes 1.49 yr (543 days), computed from the semi-major axis of 1.303 AU.

An eccentricity of 0.332 makes the orbit moderately elongated.

The orbital plane is tilted 5.49° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.9 km/s at perihelion and falls to 18.5 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 = 22.55 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

Astrometry from 241 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5161 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
1.303 AU
Eccentricity
0.3322
Perihelion
0.87 AU
Aphelion
1.735857 AU
Inclination
5.49°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
353.8°

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-Oct-25 17:32 0.276875 AU
41419843 km
16.36 km/s
2030-Oct-16 15:33 0.442519 AU
66199924 km
21.24 km/s
2062-Apr-10 13:41 0.488757 AU
73117073 km
22.29 km/s
2065-Apr-02 00:12 0.328191 AU
49096702 km
17.40 km/s
2068-Mar-24 01:31 0.178328 AU
26677433 km
12.61 km/s
2070-Sep-29 14:09 0.418436 AU
62597154 km
5.97 km/s
2071-Mar-12 15:58 0.090289 AU
13507037 km
7.98 km/s
2074-Jan-28 16:27 0.132062 AU
19756262 km
6.64 km/s
2076-Dec-13 13:22 0.101966 AU
15253914 km
6.70 km/s
2077-Apr-08 15:03 0.321600 AU
48110617 km
4.53 km/s
2079-Nov-13 14:43 0.022718 AU
3398601 km
8.78 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
22.55

Orbit Quality

RMS
0.51611
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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