SpaceAtlas Space Object Data
NASA JPL SBDB · 450159

450159

450159 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.91 AU it takes 2.64 yr to circle the Sun.

Apollo Observations: 185
Orbital Period · P
2.64 yr
v(q)
51.6 km/s
v(Q)
9 km/s
Diameter · ≈
0.56 km
TJ
3.58
Eccentricity · e
0.7025

Orbit and dynamics

The path is an ellipse reaching 0.568 AU from the Sun at perihelion and 3.252 AU at aphelion, a radial span of 2.684 AU.

Applying Kepler's third law to a = 1.91 AU gives an orbital period of 2.64 yr, or about 964 days.

The high eccentricity (0.703) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.44° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 51.6 km/s at perihelion and falls to 9 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 0.73 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.09 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 185 observations and has a weighted RMS residual of 0.4574 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
1.91 AU
Eccentricity
0.7025
Perihelion
0.568 AU
Aphelion
3.251775 AU
Inclination
9.44°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
343.13°

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
0.735 km
Albedo
0.09
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.03

Orbit Quality

RMS
0.4574
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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