SpaceAtlas Space Object Data
NASA JPL SBDB · 2009 FP28

2009 FP28

2009 FP28 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.004 AU it takes 2.84 yr to circle the Sun.

Apollo Observations: 42
Orbital Period · P
2.84 yr
v(q)
38.8 km/s
v(Q)
11.4 km/s
Diameter · ≈
0.22 km
TJ
3.63
Eccentricity · e
0.5448

Orbit and dynamics

The path is an ellipse reaching 0.912 AU from the Sun at perihelion and 3.096 AU at aphelion, a radial span of 2.184 AU.

Applying Kepler's third law to a = 2.004 AU gives an orbital period of 2.84 yr, or about 1,036 days.

The high eccentricity (0.545) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 8.19° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38.8 km/s at perihelion and falls to 11.4 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 = 21.09 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.22 km.

Observation record and orbit quality

The current orbit solution is based on 42 observations and has a weighted RMS residual of 0.5027 arcseconds.

Condition code U = 0 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
2.004 AU
Eccentricity
0.5448
Perihelion
0.912 AU
Aphelion
3.095779 AU
Inclination
8.19°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
6.01°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
21.09

Orbit Quality

RMS
0.50267
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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