SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 HA

2016 HA

2016 HA belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.356 AU it takes 1.58 yr to circle the Sun.

Apollo Observations: 42
Orbital Period · P
1.58 yr
v(q)
40.5 km/s
v(Q)
16.2 km/s
Diameter · ≈
0.02 km
TJ
4.76
Eccentricity · e
0.429

Orbit and dynamics

The path is an ellipse reaching 0.774 AU from the Sun at perihelion and 1.938 AU at aphelion, a radial span of 1.164 AU.

Applying Kepler's third law to a = 1.356 AU gives an orbital period of 1.58 yr, or about 577 days.

The high eccentricity (0.429) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.11° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.5 km/s at perihelion and falls to 16.2 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 = 26.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 42 observations and has a weighted RMS residual of 0.3678 arcseconds.

Condition code U = 7 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
1.356 AU
Eccentricity
0.429
Perihelion
0.774 AU
Aphelion
1.937724 AU
Inclination
1.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
115.42°

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
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
26.2

Orbit Quality

RMS
0.36778
Condition
7
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.