SpaceAtlas Space Object Data
NASA JPL SBDB · 872894

872894

872894 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.417 AU it takes 1.69 yr to circle the Sun.

Apollo Observations: 217
Orbital Period · P
1.69 yr
v(q)
34.1 km/s
v(Q)
18.4 km/s
Diameter · ≈
0.14 km
TJ
4.67
Eccentricity · e
0.2998

Orbit and dynamics

The path is an ellipse reaching 0.992 AU from the Sun at perihelion and 1.842 AU at aphelion, a radial span of 0.85 AU.

Applying Kepler's third law to a = 1.417 AU gives an orbital period of 1.69 yr, or about 616 days.

An eccentricity of 0.3 makes the orbit moderately elongated.

Its inclination of 1.23° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 34.1 km/s at perihelion and falls to 18.4 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

No direct size measurement is available; from an absolute magnitude of H = 22.08 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.14 km.

Observation record and orbit quality

The current orbit solution is based on 217 observations and has a weighted RMS residual of 0.4307 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
1.417 AU
Eccentricity
0.2998
Perihelion
0.992 AU
Aphelion
1.841817 AU
Inclination
1.23°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
130.73°

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
2051-Mar-10 17:50 0.055827 AU
8351583 km
5.61 km/s
2073-Jan-12 20:55 0.050652 AU
7577362 km
5.56 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
22.08

Orbit Quality

RMS
0.43066
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.

Keep exploring

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