SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 EE5

2008 EE5

2008 EE5 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.945 AU and a period of 0.92 yr.

Aten Observations: 200
Orbital Period · P
0.92 yr
v(q)
32.9 km/s
v(Q)
28.5 km/s
Diameter · ≈
0.41 km
TJ
6.11
Eccentricity · e
0.0716

Orbit and dynamics

Between its closest point (0.877 AU) and its farthest (1.012 AU), the heliocentric distance changes by 0.135 AU over every revolution.

One full revolution takes 0.92 yr (335 days), computed from the semi-major axis of 0.945 AU.

With e = 0.072, the orbit is close to circular.

A steep inclination of 44.81° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32.9 km/s at perihelion and falls to 28.5 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 = 19.71 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.41 km.

Observation record and orbit quality

Astrometry from 200 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5875 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
0.9448 AU
Eccentricity
0.0716
Perihelion
0.877 AU
Aphelion
1.012448 AU
Inclination
44.81°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
106.71°

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
2031-Feb-16 22:41 0.256023 AU
38300502 km
23.95 km/s
2031-Aug-18 09:37 0.148395 AU
22199562 km
23.97 km/s
2032-Feb-05 23:13 0.209642 AU
31362002 km
23.22 km/s
2032-Jul-22 03:10 0.418923 AU
62669999 km
26.90 km/s
2042-Feb-19 21:56 0.375530 AU
56178415 km
25.46 km/s
2042-Aug-25 02:55 0.231323 AU
34605480 km
24.49 km/s
2043-Feb-08 13:45 0.090854 AU
13591582 km
22.58 km/s
2043-Jul-29 18:36 0.308332 AU
46125799 km
25.47 km/s
2053-Feb-22 12:17 0.475648 AU
71155915 km
27.06 km/s
2053-Aug-30 16:26 0.320498 AU
47945854 km
25.34 km/s
2054-Feb-10 18:42 0.024437 AU
3655664 km
22.50 km/s
2054-Aug-04 09:40 0.220766 AU
33026150 km
24.58 km/s
2055-Jan-31 05:10 0.447590 AU
66958452 km
26.01 km/s
2064-Sep-06 08:13 0.435292 AU
65118690 km
26.82 km/s
2065-Feb-13 15:58 0.140221 AU
20976782 km
22.97 km/s
2065-Aug-11 09:06 0.141078 AU
21104984 km
23.98 km/s
2066-Feb-02 21:33 0.324438 AU
48535308 km
24.34 km/s
2076-Feb-17 16:50 0.266351 AU
39845538 km
24.06 km/s
2076-Aug-18 09:47 0.152676 AU
22840018 km
23.98 km/s
2077-Feb-05 15:29 0.198937 AU
29760538 km
23.14 km/s
2077-Jul-23 05:12 0.409346 AU
61237218 km
26.77 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
19.71

Orbit Quality

RMS
0.58746
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.

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