SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 CZ4

2008 CZ4

2008 CZ4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.299 AU it takes 1.48 yr to circle the Sun.

Apollo Observations: 48
Orbital Period · P
1.48 yr
v(q)
38.9 km/s
v(Q)
17.5 km/s
Diameter · ≈
0.04 km
TJ
4.9
Eccentricity · e
0.3791

Orbit and dynamics

Between its closest point (0.807 AU) and its farthest (1.791 AU), the heliocentric distance changes by 0.984 AU over every revolution.

One full revolution takes 1.48 yr (541 days), computed from the semi-major axis of 1.299 AU.

An eccentricity of 0.379 makes the orbit moderately elongated.

The orbital plane is tilted 14.58° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38.9 km/s at perihelion and falls to 17.5 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 = 24.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 48 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3637 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
1.299 AU
Eccentricity
0.3791
Perihelion
0.807 AU
Aphelion
1.791451 AU
Inclination
14.58°
Orbital Period
— yr
Epoch
2454504.5
Mean Anomaly
38.3°

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
2056-Aug-11 22:37 0.335471 AU
50185760 km
24.30 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
24.9

Orbit Quality

RMS
0.36366
Condition
8
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.

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