SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 EW85

2016 EW85

2016 EW85 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.15 AU it takes 1.23 yr to circle the Sun.

Apollo Observations: 85
Orbital Period · P
1.23 yr
v(q)
42.9 km/s
v(Q)
18 km/s
Diameter · ≈
0.01 km
TJ
5.38
Eccentricity · e
0.4095

Orbit and dynamics

Between its closest point (0.679 AU) and its farthest (1.621 AU), the heliocentric distance changes by 0.942 AU over every revolution.

One full revolution takes 1.23 yr (450 days), computed from the semi-major axis of 1.15 AU.

The high eccentricity (0.409) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.55° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 42.9 km/s at perihelion and falls to 18 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 = 27.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 85 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4818 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
1.15 AU
Eccentricity
0.4095
Perihelion
0.679 AU
Aphelion
1.620925 AU
Inclination
2.55°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
57.75°

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-Feb-03 15:03 0.466884 AU
69844896 km
10.25 km/s
2027-Jun-20 06:51 0.336413 AU
50326667 km
13.60 km/s
2033-Oct-16 22:11 0.264170 AU
39519226 km
23.53 km/s
2037-Mar-06 05:50 0.124808 AU
18671012 km
19.95 km/s
2038-Sep-27 12:34 0.012354 AU
1848175 km
10.97 km/s
2043-Nov-04 06:11 0.394903 AU
59076670 km
9.40 km/s
2049-Oct-22 22:46 0.401992 AU
60137142 km
27.55 km/s
2053-Mar-11 13:34 0.036076 AU
5396962 km
16.39 km/s
2054-Oct-03 06:27 0.012230 AU
1829517 km
14.21 km/s
2059-Jul-31 19:02 0.296929 AU
44419948 km
11.53 km/s
2059-Oct-22 04:03 0.363636 AU
54399162 km
7.94 km/s
2064-Feb-14 08:19 0.390671 AU
58443527 km
9.24 km/s
2069-Mar-20 09:32 0.003405 AU
509344 km
11.09 km/s
2070-Oct-12 01:46 0.082297 AU
12311425 km
19.93 km/s
2074-Mar-02 04:39 0.177575 AU
26564788 km
23.15 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
27.6

Orbit Quality

RMS
0.4818
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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