SpaceAtlas Space Object Data
NASA JPL SBDB · 2014 HD199

2014 HD199

2014 HD199 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.593 AU it takes 2.01 yr to circle the Sun.

Apollo Observations: 18
Orbital Period · P
2.01 yr
v(q)
35.4 km/s
v(Q)
15.7 km/s
Diameter · ≈
0.12 km
TJ
4.28
Eccentricity · e
0.3848

Orbit and dynamics

The path is an ellipse reaching 0.98 AU from the Sun at perihelion and 2.206 AU at aphelion, a radial span of 1.226 AU.

Applying Kepler's third law to a = 1.593 AU gives an orbital period of 2.01 yr, or about 734 days.

An eccentricity of 0.385 makes the orbit moderately elongated.

The orbital plane is tilted 6.73° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.4 km/s at perihelion and falls to 15.7 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 = 22.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.12 km.

Observation record and orbit quality

The current orbit solution is based on 18 observations and has a weighted RMS residual of 0.3537 arcseconds.

Condition code U = 9 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
1.593 AU
Eccentricity
0.3848
Perihelion
0.98 AU
Aphelion
2.205986 AU
Inclination
6.73°
Orbital Period
— yr
Epoch
2456777.5
Mean Anomaly
37.93°

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

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
22.3

Orbit Quality

RMS
0.35373
Condition
9
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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