SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 JP4

2013 JP4

2013 JP4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.416 AU it takes 1.68 yr to circle the Sun.

Apollo Observations: 57
Orbital Period · P
1.68 yr
v(q)
36.3 km/s
v(Q)
17.3 km/s
Diameter · ≈
0.04 km
TJ
4.63
Eccentricity · e
0.3555

Orbit and dynamics

The path is an ellipse reaching 0.912 AU from the Sun at perihelion and 1.919 AU at aphelion, a radial span of 1.007 AU.

Applying Kepler's third law to a = 1.416 AU gives an orbital period of 1.68 yr, or about 615 days.

An eccentricity of 0.355 makes the orbit moderately elongated.

The orbital plane is tilted 12.98° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.3 km/s at perihelion and falls to 17.3 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 = 24.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 57 observations and has a weighted RMS residual of 0.5321 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.416 AU
Eccentricity
0.3555
Perihelion
0.912 AU
Aphelion
1.919388 AU
Inclination
12.98°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
307.83°

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
2066-Dec-30 04:41 0.203484 AU
30440810 km
12.05 km/s
2071-Dec-18 05:12 0.303268 AU
45368261 km
6.93 km/s
2072-Apr-20 19:15 0.054460 AU
8147065 km
8.73 km/s
2077-May-14 20:20 0.091415 AU
13675488 km
16.58 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
24.6

Orbit Quality

RMS
0.5321
Condition
7
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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