SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 AD193

2016 AD193

2016 AD193 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.54 AU it takes 1.91 yr to circle the Sun.

Apollo Observations: 38
Orbital Period · P
1.91 yr
v(q)
51.8 km/s
v(Q)
11.1 km/s
Diameter · ≈
0.26 km
TJ
4.2
Eccentricity · e
0.646

Orbit and dynamics

The path is an ellipse reaching 0.545 AU from the Sun at perihelion and 2.535 AU at aphelion, a radial span of 1.99 AU.

Applying Kepler's third law to a = 1.54 AU gives an orbital period of 1.91 yr, or about 698 days.

The high eccentricity (0.646) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.79° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 51.8 km/s at perihelion and falls to 11.1 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 = 20.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.26 km.

Observation record and orbit quality

The current orbit solution is based on 38 observations and has a weighted RMS residual of 0.6412 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
1.54 AU
Eccentricity
0.646
Perihelion
0.545 AU
Aphelion
2.53484 AU
Inclination
7.79°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
203.93°

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
2035-Jan-15 01:49 0.183491 AU
27449898 km
25.02 km/s
2036-Nov-17 23:20 0.379550 AU
56779867 km
16.08 km/s
2038-Sep-17 13:04 0.453941 AU
67908534 km
22.07 km/s
2040-Jul-05 00:44 0.230474 AU
34478449 km
14.86 km/s
2042-Jun-03 02:27 0.367419 AU
54965098 km
30.52 km/s
2056-Jan-20 20:39 0.288728 AU
43193157 km
28.59 km/s
2057-Dec-12 17:02 0.306004 AU
45777590 km
12.32 km/s
2059-Sep-30 13:09 0.459810 AU
68786601 km
22.47 km/s
2061-Jul-25 07:42 0.321352 AU
48073545 km
14.37 km/s
2063-Jun-09 09:39 0.258121 AU
38614329 km
26.94 km/s
2077-Jan-23 21:21 0.359670 AU
53805926 km
30.92 km/s
2078-Dec-25 13:48 0.243893 AU
36485829 km
13.55 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
20.7

Orbit Quality

RMS
0.64119
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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