SpaceAtlas Space Object Data
NASA JPL SBDB · 1999 FP19

1999 FP19

1999 FP19 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.943 AU it takes 2.71 yr to circle the Sun.

Apollo Observations: 99
Orbital Period · P
2.71 yr
v(q)
38 km/s
v(Q)
12 km/s
Diameter · ≈
0.32 km
TJ
3.69
Eccentricity · e
0.5191

Orbit and dynamics

The path is an ellipse reaching 0.934 AU from the Sun at perihelion and 2.952 AU at aphelion, a radial span of 2.018 AU.

Applying Kepler's third law to a = 1.943 AU gives an orbital period of 2.71 yr, or about 989 days.

The high eccentricity (0.519) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 15.09° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38 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 = 20.26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.32 km.

Observation record and orbit quality

The current orbit solution is based on 99 observations and has a weighted RMS residual of 0.6137 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
1.943 AU
Eccentricity
0.5191
Perihelion
0.934 AU
Aphelion
2.951611 AU
Inclination
15.09°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
350.27°

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
2045-Aug-02 16:08 0.192723 AU
28830908 km
10.71 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
20.26

Orbit Quality

RMS
0.61371
Condition
0
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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