SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 EG1

2017 EG1

2017 EG1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.805 AU it takes 2.43 yr to circle the Sun.

Apollo Observations: 14
Orbital Period · P
2.43 yr
v(q)
35.8 km/s
v(Q)
13.7 km/s
Diameter · ≈
0.01 km
TJ
3.94
Eccentricity · e
0.4451

Orbit and dynamics

The path is an ellipse reaching 1.002 AU from the Sun at perihelion and 2.608 AU at aphelion, a radial span of 1.606 AU.

Applying Kepler's third law to a = 1.805 AU gives an orbital period of 2.43 yr, or about 886 days.

The high eccentricity (0.445) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.27° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.8 km/s at perihelion and falls to 13.7 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 27.65 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 14 observations and has a weighted RMS residual of 0.4874 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
1.805 AU
Eccentricity
0.4451
Perihelion
1.002 AU
Aphelion
2.608405 AU
Inclination
3.27°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
294.88°

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
2063-Apr-20 13:49 0.098474 AU
14731557 km
12.13 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
27.65

Orbit Quality

RMS
0.48744
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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