SpaceAtlas Space Object Data
NASA JPL SBDB · 876653

876653

876653 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.817 AU and a period of 0.74 yr.

Aten Observations: 186
Orbital Period · P
0.74 yr
v(q)
75.6 km/s
v(Q)
14.3 km/s
Diameter · ≈
0.24 km
TJ
6.91
Eccentricity · e
0.6812

Orbit and dynamics

The path is an ellipse reaching 0.261 AU from the Sun at perihelion and 1.374 AU at aphelion, a radial span of 1.113 AU.

Applying Kepler's third law to a = 0.817 AU gives an orbital period of 0.74 yr, or about 270 days.

The high eccentricity (0.681) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 21.75° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 75.6 km/s at perihelion and falls to 14.3 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 = 20.89 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.24 km.

Observation record and orbit quality

The current orbit solution is based on 186 observations and has a weighted RMS residual of 0.4826 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
0.8174 AU
Eccentricity
0.6812
Perihelion
0.261 AU
Aphelion
1.374213 AU
Inclination
21.75°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
172.92°

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
20.89

Orbit Quality

RMS
0.48264
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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