SpaceAtlas Space Object Data
NASA JPL SBDB · 530871

530871

530871 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.009 AU it takes 1.01 yr to circle the Sun.

Apollo Observations: 127
Orbital Period · P
1.01 yr
v(q)
77.3 km/s
v(Q)
11.4 km/s
Diameter · ≈
1.26 km
TJ
5.56
Eccentricity · e
0.7433

Orbit and dynamics

The path is an ellipse reaching 0.259 AU from the Sun at perihelion and 1.759 AU at aphelion, a radial span of 1.5 AU.

Applying Kepler's third law to a = 1.009 AU gives an orbital period of 1.01 yr, or about 370 days.

The high eccentricity (0.743) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 46.8° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 77.3 km/s at perihelion and falls to 11.4 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 1.43 km, a value from direct size determination rather than from brightness alone.

Observation record and orbit quality

The current orbit solution is based on 127 observations and has a weighted RMS residual of 0.3845 arcseconds.

Condition code U = 1 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
1.009 AU
Eccentricity
0.7433
Perihelion
0.259 AU
Aphelion
1.75899 AU
Inclination
46.8°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
168.4°

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
1.434 km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
17.25

Orbit Quality

RMS
0.38454
Condition
1
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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