SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 FN8

2004 FN8

2004 FN8 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.169 AU it takes 1.26 yr to circle the Sun.

Apollo Observations: 27
Orbital Period · P
1.26 yr
v(q)
31.9 km/s
v(Q)
23.8 km/s
Diameter · ≈
0.01 km
TJ
5.39
Eccentricity · e
0.1445

Orbit and dynamics

Between its closest point (1 AU) and its farthest (1.338 AU), the heliocentric distance changes by 0.338 AU over every revolution.

One full revolution takes 1.26 yr (462 days), computed from the semi-major axis of 1.169 AU.

An eccentricity of 0.144 makes the orbit moderately elongated.

The orbital plane is tilted 5.26° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31.9 km/s at perihelion and falls to 23.8 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.1 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 27 individual observations underpins this orbit; the fit leaves an RMS residual of 0.562 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
1.169 AU
Eccentricity
0.1445
Perihelion
1.0 AU
Aphelion
1.337921 AU
Inclination
5.26°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
220.9°

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
2032-Oct-19 04:55 0.296666 AU
44380671 km
5.70 km/s
2033-May-09 01:47 0.465359 AU
69616714 km
16.11 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
27.1

Orbit Quality

RMS
0.56199
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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