SpaceAtlas Space Object Data
NASA JPL SBDB · 488615

488615

488615 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.18 AU it takes 1.28 yr to circle the Sun.

Apollo Observations: 124
Orbital Period · P
1.28 yr
v(q)
33.5 km/s
v(Q)
22.5 km/s
Diameter · ≈
0.17 km
TJ
5.34
Eccentricity · e
0.1961

Orbit and dynamics

The path is an ellipse reaching 0.948 AU from the Sun at perihelion and 1.411 AU at aphelion, a radial span of 0.463 AU.

Applying Kepler's third law to a = 1.18 AU gives an orbital period of 1.28 yr, or about 468 days.

An eccentricity of 0.196 makes the orbit moderately elongated.

The orbital plane is tilted 6.69° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.5 km/s at perihelion and falls to 22.5 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 = 21.64 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

The current orbit solution is based on 124 observations and has a weighted RMS residual of 0.7097 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
1.18 AU
Eccentricity
0.1961
Perihelion
0.948 AU
Aphelion
1.411398 AU
Inclination
6.69°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
121.24°

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
21.64

Orbit Quality

RMS
0.70971
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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