SpaceAtlas Space Object Data
NASA JPL SBDB · 2024 HC

2024 HC

2024 HC is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.942 AU and a period of 0.91 yr.

Aten Observations: 83
Orbital Period · P
0.91 yr
v(q)
33.6 km/s
v(Q)
28 km/s
Diameter · ≈
0.01 km
TJ
6.37
Eccentricity · e
0.0904

Orbit and dynamics

Between its closest point (0.857 AU) and its farthest (1.027 AU), the heliocentric distance changes by 0.17 AU over every revolution.

One full revolution takes 0.91 yr (334 days), computed from the semi-major axis of 0.942 AU.

With e = 0.09, the orbit is close to circular.

Its inclination of 0.86° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 28 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 = 27.44 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 83 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6624 arcseconds.

Condition code U = 5 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
0.9416 AU
Eccentricity
0.0904
Perihelion
0.857 AU
Aphelion
1.026721 AU
Inclination
0.86°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
283.29°

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
2034-Nov-20 02:38 0.130711 AU
19554086 km
3.43 km/s
2035-Jun-11 18:27 0.135815 AU
20317632 km
6.15 km/s
2045-Mar-11 03:53 0.055257 AU
8266342 km
3.77 km/s
2045-Sep-04 02:20 0.110507 AU
16531623 km
2.61 km/s
2056-Mar-11 22:53 0.007548 AU
1129170 km
2.45 km/s
2056-Sep-01 01:44 0.090525 AU
13542398 km
2.18 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
27.44

Orbit Quality

RMS
0.66241
Condition
5
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.