SpaceAtlas Space Object Data
NASA JPL SBDB · 88213

88213

88213 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.954 AU and a period of 0.93 yr.

Aten Observations: 364
Orbital Period · P
0.93 yr
v(q)
60.6 km/s
v(Q)
15.4 km/s
Diameter · ≈
0.45 km
TJ
6.11
Eccentricity · e
0.5953

Orbit and dynamics

The path is an ellipse reaching 0.386 AU from the Sun at perihelion and 1.522 AU at aphelion, a radial span of 1.136 AU.

Applying Kepler's third law to a = 0.954 AU gives an orbital period of 0.93 yr, or about 340 days.

The high eccentricity (0.595) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 17.81° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 60.6 km/s at perihelion and falls to 15.4 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 0.91 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.028 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 364 observations and has a weighted RMS residual of 0.5128 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
0.954 AU
Eccentricity
0.5953
Perihelion
0.386 AU
Aphelion
1.521916 AU
Inclination
17.81°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
228.96°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2026-Dec-14 17:02 0.189279 AU
28315763 km
17.73 km/s
2053-Dec-16 00:03 0.177657 AU
26577078 km
21.03 km/s
2067-Dec-15 05:14 0.188523 AU
28202706 km
17.72 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
0.912 km
Albedo
0.028
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.48

Orbit Quality

RMS
0.51276
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. 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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