SpaceAtlas Space Object Data
NASA JPL SBDB · 433953

433953

433953 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.076 AU it takes 1.12 yr to circle the Sun.

Apollo Observations: 548
Orbital Period · P
1.12 yr
v(q)
35.2 km/s
v(Q)
23.4 km/s
Diameter · ≈
0.23 km
TJ
5.72
Eccentricity · e
0.2009

Orbit and dynamics

The path is an ellipse reaching 0.86 AU from the Sun at perihelion and 1.292 AU at aphelion, a radial span of 0.432 AU.

Applying Kepler's third law to a = 1.076 AU gives an orbital period of 1.12 yr, or about 408 days.

An eccentricity of 0.201 makes the orbit moderately elongated.

The orbital plane is tilted 7.19° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 35.2 km/s at perihelion and falls to 23.4 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

The measured diameter is 0.26 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.115 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 548 observations and has a weighted RMS residual of 0.4002 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
1.076 AU
Eccentricity
0.2009
Perihelion
0.86 AU
Aphelion
1.292168 AU
Inclination
7.19°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
261.28°

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
0.259 km
Albedo
0.115
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.91

Orbit Quality

RMS
0.40016
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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