SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 KZ1

2013 KZ1

2013 KZ1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.563 AU it takes 1.95 yr to circle the Sun.

Apollo Observations: 88
Orbital Period · P
1.95 yr
v(q)
41.6 km/s
v(Q)
13.6 km/s
Diameter · ≈
0.18 km
TJ
4.15
Eccentricity · e
0.5067

Orbit and dynamics

The path is an ellipse reaching 0.771 AU from the Sun at perihelion and 2.355 AU at aphelion, a radial span of 1.584 AU.

Applying Kepler's third law to a = 1.563 AU gives an orbital period of 1.95 yr, or about 714 days.

The high eccentricity (0.507) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 29.2° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 41.6 km/s at perihelion and falls to 13.6 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 = 21.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

The current orbit solution is based on 88 observations and has a weighted RMS residual of 0.4224 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
1.563 AU
Eccentricity
0.5067
Perihelion
0.771 AU
Aphelion
2.354972 AU
Inclination
29.2°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
203.69°

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
2046-Dec-08 10:57 0.488343 AU
73055059 km
32.57 km/s
2048-Nov-25 02:30 0.203648 AU
30465270 km
25.27 km/s
2050-Nov-12 11:18 0.097070 AU
14521470 km
19.10 km/s
2052-Oct-26 12:08 0.390059 AU
58352020 km
15.49 km/s
2054-Jun-05 05:16 0.291807 AU
43653755 km
16.49 km/s
2056-May-30 10:12 0.211408 AU
31626240 km
21.45 km/s
2058-May-21 05:55 0.404303 AU
60482807 km
28.14 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
21.5

Orbit Quality

RMS
0.42242
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.

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