SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 CZ2

2018 CZ2

2018 CZ2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.178 AU it takes 3.21 yr to circle the Sun.

Apollo Observations: 76
Orbital Period · P
3.21 yr
v(q)
45.6 km/s
v(Q)
8.9 km/s
Diameter · ≈
0.19 km
TJ
3.34
Eccentricity · e
0.6725

Orbit and dynamics

Between its closest point (0.713 AU) and its farthest (3.643 AU), the heliocentric distance changes by 2.93 AU over every revolution.

One full revolution takes 3.21 yr (1,174 days), computed from the semi-major axis of 2.178 AU.

The high eccentricity (0.672) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.42° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 45.6 km/s at perihelion and falls to 8.9 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 = 21.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.19 km.

Observation record and orbit quality

Astrometry from 76 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4166 arcseconds.

Condition code U = 1 means the orbit is very well determined, leaving only a small uncertainty in the future ephemeris.

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
2.178 AU
Eccentricity
0.6725
Perihelion
0.713 AU
Aphelion
3.642705 AU
Inclination
5.42°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
191.97°

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-May-10 23:12 0.301659 AU
45127584 km
16.00 km/s
2050-Jun-28 12:49 0.246376 AU
36857272 km
14.29 km/s
2063-Mar-02 03:14 0.103523 AU
15486796 km
20.57 km/s
2066-Aug-17 23:59 0.190818 AU
28545958 km
23.87 km/s
2079-Apr-08 20:13 0.247987 AU
37098257 km
13.93 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
21.4

Orbit Quality

RMS
0.41661
Condition
1
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.