SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 EY84

2008 EY84

2008 EY84 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.031 AU it takes 1.05 yr to circle the Sun.

Apollo Observations: 23
Orbital Period · P
1.05 yr
v(q)
35 km/s
v(Q)
24.6 km/s
Diameter · ≈
0.02 km
TJ
5.92
Eccentricity · e
0.1749

Orbit and dynamics

Between its closest point (0.85 AU) and its farthest (1.211 AU), the heliocentric distance changes by 0.361 AU over every revolution.

One full revolution takes 1.05 yr (382 days), computed from the semi-major axis of 1.031 AU.

An eccentricity of 0.175 makes the orbit moderately elongated.

Its inclination of 4.33° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35 km/s at perihelion and falls to 24.6 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 = 26.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 23 individual observations underpins this orbit; the fit leaves an RMS residual of 0.8764 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.031 AU
Eccentricity
0.1749
Perihelion
0.85 AU
Aphelion
1.211322 AU
Inclination
4.33°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
234.56°

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
2027-Aug-23 18:34 0.216001 AU
32313342 km
12.75 km/s
2028-Sep-08 14:00 0.015141 AU
2265031 km
4.77 km/s
2029-Jun-19 17:34 0.204325 AU
30566527 km
4.63 km/s
2030-Apr-15 23:21 0.147991 AU
22139144 km
4.11 km/s
2031-Mar-09 01:50 0.086855 AU
12993314 km
8.36 km/s
2032-Mar-22 06:00 0.402122 AU
60156667 km
17.39 km/s
2048-Aug-15 22:36 0.266945 AU
39934474 km
16.93 km/s
2049-Aug-31 07:40 0.016333 AU
2443335 km
8.22 km/s
2052-Mar-03 10:06 0.015000 AU
2244017 km
4.76 km/s
2053-Mar-15 13:03 0.140012 AU
20945533 km
13.02 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
26.8

Orbit Quality

RMS
0.87641
Condition
6
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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