SpaceAtlas Space Object Data
NASA JPL SBDB · 2000 WC1

2000 WC1

2000 WC1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.878 AU and a period of 0.82 yr.

Aten Observations: 62
Orbital Period · P
0.82 yr
v(q)
41.6 km/s
v(Q)
24.3 km/s
Diameter · ≈
0.11 km
TJ
6.68
Eccentricity · e
0.2621

Orbit and dynamics

Between its closest point (0.648 AU) and its farthest (1.109 AU), the heliocentric distance changes by 0.461 AU over every revolution.

One full revolution takes 0.82 yr (301 days), computed from the semi-major axis of 0.878 AU.

An eccentricity of 0.262 makes the orbit moderately elongated.

The orbital plane is tilted 17.42° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.6 km/s at perihelion and falls to 24.3 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 = 22.57 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

Astrometry from 62 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5407 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
0.8784 AU
Eccentricity
0.2621
Perihelion
0.648 AU
Aphelion
1.108629 AU
Inclination
17.42°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
106.34°

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
2033-Nov-16 12:38 0.125150 AU
18722163 km
9.66 km/s
2047-Nov-14 07:08 0.041719 AU
6241067 km
10.73 km/s
2061-Nov-13 18:17 0.005833 AU
872662 km
11.45 km/s
2070-Nov-16 04:52 0.126318 AU
18896905 km
14.38 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
22.57

Orbit Quality

RMS
0.54067
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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