SpaceAtlas Space Object Data
NASA JPL SBDB · 2026 FK13

2026 FK13

2026 FK13 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.959 AU and a period of 0.94 yr.

Aten Observations: 19
Orbital Period · P
0.94 yr
v(q)
77.3 km/s
v(Q)
12 km/s
Diameter · ≈
0.11 km
TJ
5.95
Eccentricity · e
0.7324

Orbit and dynamics

The path is an ellipse reaching 0.257 AU from the Sun at perihelion and 1.661 AU at aphelion, a radial span of 1.404 AU.

Applying Kepler's third law to a = 0.959 AU gives an orbital period of 0.94 yr, or about 343 days.

The high eccentricity (0.732) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 27.08° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 77.3 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 = 22.62 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

The current orbit solution is based on 19 observations and has a weighted RMS residual of 0.2125 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
0.9587 AU
Eccentricity
0.7324
Perihelion
0.257 AU
Aphelion
1.660852 AU
Inclination
27.08°
Orbital Period
— yr
Epoch
2461124.5
Mean Anomaly
259.24°

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
2027-Apr-08 21:12 0.149683 AU
22392317 km
22.60 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
22.62

Orbit Quality

RMS
0.21248
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.