SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 WB8

2016 WB8

2016 WB8 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.179 AU it takes 1.28 yr to circle the Sun.

Apollo Observations: 62
Orbital Period · P
1.28 yr
v(q)
37 km/s
v(Q)
20.3 km/s
Diameter · ≈
0.02 km
TJ
5.32
Eccentricity · e
0.291

Orbit and dynamics

Between its closest point (0.836 AU) and its farthest (1.522 AU), the heliocentric distance changes by 0.686 AU over every revolution.

One full revolution takes 1.28 yr (468 days), computed from the semi-major axis of 1.179 AU.

An eccentricity of 0.291 makes the orbit moderately elongated.

The orbital plane is tilted 6.68° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37 km/s at perihelion and falls to 20.3 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 = 25.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 62 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4116 arcseconds.

Condition code U = 2 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
1.179 AU
Eccentricity
0.291
Perihelion
0.836 AU
Aphelion
1.522089 AU
Inclination
6.68°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
111.15°

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
2030-Oct-05 06:24 0.424065 AU
63439206 km
7.50 km/s
2031-May-03 16:31 0.067261 AU
10062045 km
7.53 km/s
2034-Nov-10 04:27 0.470714 AU
70417782 km
22.21 km/s
2039-Nov-08 03:28 0.293313 AU
43879042 km
5.11 km/s
2040-Feb-16 16:37 0.183112 AU
27393131 km
6.94 km/s
2040-May-29 19:24 0.275057 AU
41147896 km
5.50 km/s
2045-May-28 01:36 0.472391 AU
70668761 km
21.84 km/s
2048-Dec-09 02:06 0.041431 AU
6197972 km
7.40 km/s
2049-Jun-28 14:26 0.405471 AU
60657671 km
7.56 km/s
2054-May-18 22:46 0.283681 AU
42438142 km
16.27 km/s
2057-Nov-27 10:10 0.122983 AU
18397936 km
12.00 km/s
2058-Jul-13 12:49 0.461469 AU
69034729 km
8.31 km/s
2062-Sep-23 14:25 0.467096 AU
69876634 km
8.17 km/s
2063-May-10 21:51 0.116414 AU
17415233 km
11.24 km/s
2066-Nov-18 09:34 0.305479 AU
45698992 km
17.34 km/s
2071-Oct-09 22:31 0.408072 AU
61046667 km
7.24 km/s
2072-Apr-30 03:40 0.089857 AU
13442356 km
6.50 km/s
2075-Nov-09 23:18 0.484190 AU
72433835 km
22.65 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
25.9

Orbit Quality

RMS
0.41155
Condition
2
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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