SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 EQ13

2017 EQ13

2017 EQ13 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.602 AU it takes 4.20 yr to circle the Sun.

Apollo Observations: 74
Orbital Period · P
4.20 yr
v(q)
44.4 km/s
v(Q)
7.7 km/s
Diameter · ≈
0.37 km
TJ
2.94
Eccentricity · e
0.7055

Orbit and dynamics

The path is an ellipse reaching 0.766 AU from the Sun at perihelion and 4.438 AU at aphelion, a radial span of 3.672 AU.

Applying Kepler's third law to a = 2.602 AU gives an orbital period of 4.20 yr, or about 1,533 days.

The high eccentricity (0.706) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 19.76° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 44.4 km/s at perihelion and falls to 7.7 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 = 19.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.37 km.

Observation record and orbit quality

The current orbit solution is based on 74 observations and has a weighted RMS residual of 0.5448 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
2.602 AU
Eccentricity
0.7055
Perihelion
0.766 AU
Aphelion
4.437711 AU
Inclination
19.76°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
54.64°

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
2038-Apr-11 20:25 0.209265 AU
31305567 km
26.09 km/s
2042-Sep-13 17:02 0.273166 AU
40865067 km
18.51 km/s
2063-Apr-26 06:11 0.061633 AU
9220179 km
19.74 km/s
2067-Sep-24 04:01 0.269221 AU
40274907 km
23.71 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
19.9

Orbit Quality

RMS
0.54481
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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