SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 RZ5

2013 RZ5

2013 RZ5 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.573 AU it takes 1.97 yr to circle the Sun.

Apollo Observations: 45
Orbital Period · P
1.97 yr
v(q)
47 km/s
v(Q)
12 km/s
Diameter · ≈
0.01 km
TJ
4.19
Eccentricity · e
0.5937

Orbit and dynamics

The path is an ellipse reaching 0.639 AU from the Sun at perihelion and 2.507 AU at aphelion, a radial span of 1.868 AU.

Applying Kepler's third law to a = 1.573 AU gives an orbital period of 1.97 yr, or about 721 days.

The high eccentricity (0.594) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.17° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 47 km/s at perihelion and falls to 12 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 = 28.4 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 45 observations and has a weighted RMS residual of 0.3159 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
1.573 AU
Eccentricity
0.5937
Perihelion
0.639 AU
Aphelion
2.50689 AU
Inclination
0.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
141.14°

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
2069-Mar-20 01:37 0.373176 AU
55826367 km
29.39 km/s
2071-Mar-12 09:29 0.165681 AU
24785457 km
24.33 km/s
2073-Mar-03 08:25 0.003021 AU
451929 km
19.32 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
28.4

Orbit Quality

RMS
0.31593
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.

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