SpaceAtlas Space Object Data
NASA JPL SBDB · 885268

885268

885268 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.785 AU and a period of 0.70 yr.

Aten Observations: 237
Orbital Period · P
0.70 yr
v(q)
59.5 km/s
v(Q)
19 km/s
Diameter · ≈
0.39 km
TJ
7.27
Eccentricity · e
0.5154

Orbit and dynamics

The path is an ellipse reaching 0.38 AU from the Sun at perihelion and 1.189 AU at aphelion, a radial span of 0.809 AU.

Applying Kepler's third law to a = 0.785 AU gives an orbital period of 0.70 yr, or about 254 days.

The high eccentricity (0.515) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 15.38° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 59.5 km/s at perihelion and falls to 19 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 = 19.81 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.39 km.

Observation record and orbit quality

The current orbit solution is based on 237 observations and has a weighted RMS residual of 0.4246 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
0.7848 AU
Eccentricity
0.5154
Perihelion
0.38 AU
Aphelion
1.189286 AU
Inclination
15.38°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
135.92°

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

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

Date (UTC)Miss distanceVelocity
2034-Sep-09 15:56 0.141221 AU
21126384 km
14.69 km/s
2050-Sep-09 05:22 0.157574 AU
23572667 km
13.72 km/s
2066-Sep-09 05:37 0.169741 AU
25392842 km
13.19 km/s
2075-Sep-16 03:28 0.192675 AU
28823826 km
20.17 km/s

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

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.81

Orbit Quality

RMS
0.42461
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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