SpaceAtlas Space Object Data
NASA JPL SBDB · 2002 NE71

2002 NE71

2002 NE71 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.915 AU it takes 2.65 yr to circle the Sun.

Apollo Observations: 237
Orbital Period · P
2.65 yr
v(q)
42 km/s
v(Q)
11 km/s
Diameter · ≈
0.5 km
TJ
3.69
Eccentricity · e
0.5845

Orbit and dynamics

The path is an ellipse reaching 0.796 AU from the Sun at perihelion and 3.034 AU at aphelion, a radial span of 2.238 AU.

Applying Kepler's third law to a = 1.915 AU gives an orbital period of 2.65 yr, or about 968 days.

The high eccentricity (0.585) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.19° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 42 km/s at perihelion and falls to 11 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 = 19.25 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.5 km.

Observation record and orbit quality

The current orbit solution is based on 237 observations and has a weighted RMS residual of 0.3383 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
1.915 AU
Eccentricity
0.5845
Perihelion
0.796 AU
Aphelion
3.034318 AU
Inclination
7.19°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
324.04°

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
2048-Jan-04 20:04 0.062147 AU
9297102 km
13.45 km/s
2063-Sep-13 12:53 0.132655 AU
19844929 km
12.73 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
19.25

Orbit Quality

RMS
0.3383
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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