SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 HC3

2023 HC3

2023 HC3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.951 AU and a period of 0.93 yr.

Aten Observations: 69
Orbital Period · P
0.93 yr
v(q)
39.5 km/s
v(Q)
23.6 km/s
Diameter · ≈
0.06 km
TJ
6.3
Eccentricity · e
0.2507

Orbit and dynamics

Between its closest point (0.712 AU) and its farthest (1.189 AU), the heliocentric distance changes by 0.477 AU over every revolution.

One full revolution takes 0.93 yr (339 days), computed from the semi-major axis of 0.951 AU.

An eccentricity of 0.251 makes the orbit moderately elongated.

Its inclination of 3.84° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.5 km/s at perihelion and falls to 23.6 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 = 23.94 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 69 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4982 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
0.9508 AU
Eccentricity
0.2507
Perihelion
0.712 AU
Aphelion
1.189166 AU
Inclination
3.84°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
240.57°

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
23.94

Orbit Quality

RMS
0.49819
Condition
3
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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