SpaceAtlas Space Object Data
NASA JPL SBDB · 303449

303449

303449 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.014 AU it takes 2.86 yr to circle the Sun.

Apollo Observations: 358
Orbital Period · P
2.86 yr
v(q)
43.9 km/s
v(Q)
10 km/s
Diameter · ≈
0.79 km
TJ
3.55
Eccentricity · e
0.6281

Orbit and dynamics

The path is an ellipse reaching 0.749 AU from the Sun at perihelion and 3.279 AU at aphelion, a radial span of 2.53 AU.

Applying Kepler's third law to a = 2.014 AU gives an orbital period of 2.86 yr, or about 1,044 days.

The high eccentricity (0.628) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.6° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 43.9 km/s at perihelion and falls to 10 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 = 18.27 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.79 km.

Observation record and orbit quality

The current orbit solution is based on 358 observations and has a weighted RMS residual of 0.4991 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
2.014 AU
Eccentricity
0.6281
Perihelion
0.749 AU
Aphelion
3.278993 AU
Inclination
6.6°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
110.77°

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
18.27

Orbit Quality

RMS
0.49911
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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