SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 FK

2015 FK

2015 FK belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.816 AU it takes 2.45 yr to circle the Sun.

Apollo Observations: 105
Orbital Period · P
2.45 yr
v(q)
35.8 km/s
v(Q)
13.6 km/s
Diameter · ≈
0.03 km
TJ
3.92
Eccentricity · e
0.4483

Orbit and dynamics

The path is an ellipse reaching 1.002 AU from the Sun at perihelion and 2.63 AU at aphelion, a radial span of 1.628 AU.

Applying Kepler's third law to a = 1.816 AU gives an orbital period of 2.45 yr, or about 894 days.

The high eccentricity (0.448) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.21° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.8 km/s at perihelion and falls to 13.6 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 25.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

The current orbit solution is based on 105 observations and has a weighted RMS residual of 0.3709 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.816 AU
Eccentricity
0.4483
Perihelion
1.002 AU
Aphelion
2.630113 AU
Inclination
6.21°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
209.35°

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
2042-Jan-30 06:28 0.273044 AU
40846760 km
19.34 km/s
2059-May-21 07:42 0.241034 AU
36058152 km
17.38 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
25.4

Orbit Quality

RMS
0.37092
Condition
6
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.