SpaceAtlas Space Object Data
NASA JPL SBDB · 2022 HC4

2022 HC4

2022 HC4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.656 AU it takes 2.13 yr to circle the Sun.

Apollo Observations: 52
Orbital Period · P
2.13 yr
v(q)
38.7 km/s
v(Q)
13.9 km/s
Diameter · ≈
0.01 km
TJ
4.14
Eccentricity · e
0.4725

Orbit and dynamics

The path is an ellipse reaching 0.874 AU from the Sun at perihelion and 2.438 AU at aphelion, a radial span of 1.564 AU.

Applying Kepler's third law to a = 1.656 AU gives an orbital period of 2.13 yr, or about 778 days.

The high eccentricity (0.472) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.72° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 38.7 km/s at perihelion and falls to 13.9 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 = 27.42 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 52 observations and has a weighted RMS residual of 0.4466 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
1.656 AU
Eccentricity
0.4725
Perihelion
0.874 AU
Aphelion
2.43846 AU
Inclination
1.72°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
313.33°

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
2073-Sep-24 16:16 0.341615 AU
51104899 km
24.99 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
27.42

Orbit Quality

RMS
0.44662
Condition
7
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.

Keep exploring

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