SpaceAtlas Space Object Data
NASA JPL SBDB · 2008 LW16

2008 LW16

2008 LW16 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.066 AU it takes 1.10 yr to circle the Sun.

Apollo Observations: 171
Orbital Period · P
1.10 yr
v(q)
32 km/s
v(Q)
26 km/s
Diameter · ≈
0.36 km
TJ
5.66
Eccentricity · e
0.1035

Orbit and dynamics

The path is an ellipse reaching 0.956 AU from the Sun at perihelion and 1.176 AU at aphelion, a radial span of 0.22 AU.

Applying Kepler's third law to a = 1.066 AU gives an orbital period of 1.10 yr, or about 402 days.

An eccentricity of 0.103 makes the orbit moderately elongated.

A steep inclination of 29.69° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32 km/s at perihelion and falls to 26 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 = 19.95 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.36 km.

Observation record and orbit quality

The current orbit solution is based on 171 observations and has a weighted RMS residual of 0.539 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
1.066 AU
Eccentricity
0.1035
Perihelion
0.956 AU
Aphelion
1.176331 AU
Inclination
29.69°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
310.37°

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
2029-Dec-08 05:35 0.462633 AU
69208907 km
20.79 km/s
2030-Jul-01 19:19 0.160037 AU
23941194 km
14.60 km/s
2031-Jan-06 19:13 0.166875 AU
24964108 km
17.00 km/s
2031-Jun-17 04:51 0.484445 AU
72472014 km
17.40 km/s
2040-Dec-10 23:44 0.400197 AU
59868596 km
19.64 km/s
2041-Jun-30 07:17 0.157815 AU
23608746 km
14.53 km/s
2042-Jan-09 13:48 0.230955 AU
34550399 km
17.74 km/s
2051-Jul-10 04:10 0.458822 AU
68638834 km
18.31 km/s
2051-Dec-15 01:02 0.331227 AU
49550783 km
18.51 km/s
2052-Jun-28 14:50 0.173160 AU
25904415 km
14.56 km/s
2053-Jan-12 14:19 0.300962 AU
45023258 km
18.75 km/s
2062-Jul-09 00:36 0.402603 AU
60228534 km
17.41 km/s
2062-Dec-18 08:39 0.256814 AU
38418775 km
17.50 km/s
2063-Jun-27 18:36 0.205321 AU
30715590 km
14.71 km/s
2064-Jan-16 19:53 0.375422 AU
56162322 km
20.03 km/s
2073-Jul-07 18:17 0.348716 AU
52167148 km
16.63 km/s
2073-Dec-21 14:42 0.183705 AU
27481816 km
16.73 km/s
2074-Jun-25 21:55 0.246281 AU
36843186 km
14.97 km/s
2075-Jan-19 23:18 0.447027 AU
66874248 km
21.40 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
19.95

Orbit Quality

RMS
0.53901
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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