SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 ER70

2005 ER70

2005 ER70 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.224 AU it takes 1.35 yr to circle the Sun.

Apollo Observations: 51
Orbital Period · P
1.35 yr
v(q)
33.8 km/s
v(Q)
21.5 km/s
Diameter · ≈
0.04 km
TJ
5.19
Eccentricity · e
0.2228

Orbit and dynamics

The path is an ellipse reaching 0.951 AU from the Sun at perihelion and 1.497 AU at aphelion, a radial span of 0.546 AU.

Applying Kepler's third law to a = 1.224 AU gives an orbital period of 1.35 yr, or about 495 days.

An eccentricity of 0.223 makes the orbit moderately elongated.

The orbital plane is tilted 6.83° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.8 km/s at perihelion and falls to 21.5 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 = 25.02 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 51 observations and has a weighted RMS residual of 0.5979 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
1.224 AU
Eccentricity
0.2228
Perihelion
0.951 AU
Aphelion
1.496707 AU
Inclination
6.83°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
207.86°

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
2062-Feb-23 18:01 0.371492 AU
55574454 km
18.39 km/s
2062-Sep-28 20:44 0.427851 AU
64005543 km
7.78 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
25.02

Orbit Quality

RMS
0.59795
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.

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