SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 FH4

2020 FH4

2020 FH4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.167 AU it takes 1.26 yr to circle the Sun.

Apollo Observations: 76
Orbital Period · P
1.26 yr
v(q)
31.8 km/s
v(Q)
23.9 km/s
Diameter · ≈
0.01 km
TJ
5.4
Eccentricity · e
0.1407

Orbit and dynamics

Between its closest point (1.002 AU) and its farthest (1.331 AU), the heliocentric distance changes by 0.329 AU over every revolution.

One full revolution takes 1.26 yr (460 days), computed from the semi-major axis of 1.167 AU.

An eccentricity of 0.141 makes the orbit moderately elongated.

Its inclination of 2.89° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 31.8 km/s at perihelion and falls to 23.9 km/s at aphelion.

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

Astrometry from 76 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3913 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
1.167 AU
Eccentricity
0.1407
Perihelion
1.002 AU
Aphelion
1.331197 AU
Inclination
2.89°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
354.93°

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
2029-Nov-21 14:36 0.230141 AU
34428652 km
4.02 km/s
2030-May-03 18:31 0.247836 AU
37075706 km
10.18 km/s
2034-Oct-16 12:03 0.295143 AU
44152797 km
5.51 km/s
2039-Sep-16 14:43 0.323849 AU
48447184 km
5.85 km/s
2049-Jan-31 22:06 0.138215 AU
20676609 km
10.18 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
0.39134
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.