SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 JH12

2016 JH12

2016 JH12 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.954 AU and a period of 0.93 yr.

Aten Observations: 60
Orbital Period · P
0.93 yr
v(q)
43.2 km/s
v(Q)
21.5 km/s
Diameter · ≈
0.12 km
TJ
6.22
Eccentricity · e
0.3345

Orbit and dynamics

The path is an ellipse reaching 0.635 AU from the Sun at perihelion and 1.273 AU at aphelion, a radial span of 0.638 AU.

Applying Kepler's third law to a = 0.954 AU gives an orbital period of 0.93 yr, or about 340 days.

An eccentricity of 0.335 makes the orbit moderately elongated.

The orbital plane is tilted 18.03° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 43.2 km/s at perihelion and falls to 21.5 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 = 22.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 60 observations and has a weighted RMS residual of 0.4916 arcseconds.

Condition code U = 3 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
0.9542 AU
Eccentricity
0.3345
Perihelion
0.635 AU
Aphelion
1.27338 AU
Inclination
18.03°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
91.74°

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
2029-Mar-26 10:09 0.227843 AU
34084897 km
13.30 km/s
2029-Dec-24 08:26 0.370261 AU
55390324 km
13.94 km/s
2030-Apr-24 03:55 0.244084 AU
36514401 km
11.12 km/s
2030-Nov-04 20:10 0.354226 AU
52991529 km
17.16 km/s
2031-May-29 20:57 0.292143 AU
43704014 km
10.80 km/s
2031-Sep-15 18:23 0.339265 AU
50753268 km
13.55 km/s
2032-Jul-04 09:22 0.338165 AU
50588806 km
14.16 km/s
2042-Mar-30 08:25 0.434038 AU
64931224 km
21.43 km/s
2043-Mar-31 01:55 0.204881 AU
30649746 km
11.78 km/s
2043-Dec-11 20:49 0.369512 AU
55278173 km
15.54 km/s
2044-May-01 14:14 0.261425 AU
39108668 km
11.18 km/s
2044-Oct-24 15:30 0.349687 AU
52312401 km
16.86 km/s
2045-Jun-08 06:52 0.294916 AU
44118799 km
10.54 km/s
2045-Aug-31 00:31 0.334345 AU
50017304 km
11.64 km/s
2046-Jul-02 20:23 0.385217 AU
57627635 km
16.78 km/s
2056-Mar-27 10:34 0.361368 AU
54059933 km
18.85 km/s
2057-Apr-06 01:01 0.205790 AU
30785724 km
11.20 km/s
2057-Nov-29 21:50 0.365979 AU
54749747 km
16.50 km/s
2058-May-10 02:05 0.274801 AU
41109650 km
11.15 km/s
2058-Oct-13 23:40 0.346124 AU
51779456 km
16.26 km/s
2059-Jun-20 19:17 0.296313 AU
44327854 km
10.34 km/s
2060-Jun-28 19:18 0.452539 AU
67698857 km
19.76 km/s
2070-Mar-26 01:37 0.282691 AU
42289958 km
15.82 km/s
2071-Jan-13 01:06 0.362174 AU
54180419 km
10.57 km/s
2071-Apr-15 08:09 0.222845 AU
33337181 km
11.05 km/s
2071-Nov-18 00:27 0.360316 AU
53902560 km
17.06 km/s
2072-May-18 17:50 0.286175 AU
42811159 km
11.06 km/s
2072-Sep-30 17:50 0.342630 AU
51256730 km
15.23 km/s
2073-Jul-02 16:38 0.304129 AU
45497049 km
11.20 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
22.3

Orbit Quality

RMS
0.49159
Condition
3
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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