SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 JW28

2016 JW28

2016 JW28 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.082 AU it takes 3.00 yr to circle the Sun.

Apollo Observations: 61
Orbital Period · P
3.00 yr
v(q)
40 km/s
v(Q)
10.7 km/s
Diameter · ≈
0.03 km
TJ
3.53
Eccentricity · e
0.5792

Orbit and dynamics

The path is an ellipse reaching 0.876 AU from the Sun at perihelion and 3.288 AU at aphelion, a radial span of 2.412 AU.

Applying Kepler's third law to a = 2.082 AU gives an orbital period of 3.00 yr, or about 1,097 days.

The high eccentricity (0.579) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.92° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40 km/s at perihelion and falls to 10.7 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

The measured diameter is 0.03 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.123 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 61 observations and has a weighted RMS residual of 0.379 arcseconds.

Condition code U = 8 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
2.082 AU
Eccentricity
0.5792
Perihelion
0.876 AU
Aphelion
3.287894 AU
Inclination
0.92°
Orbital Period
— yr
Epoch
2457520.5
Mean Anomaly
347.37°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
0.031 km
Albedo
0.123
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
25.5

Orbit Quality

RMS
0.37904
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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