SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 YD

2004 YD

2004 YD is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.842 AU and a period of 0.77 yr.

Aten Observations: 22
Orbital Period · P
0.77 yr
v(q)
41.5 km/s
v(Q)
25.4 km/s
Diameter · ≈
0.06 km
TJ
6.94
Eccentricity · e
0.2404

Orbit and dynamics

The path is an ellipse reaching 0.64 AU from the Sun at perihelion and 1.045 AU at aphelion, a radial span of 0.405 AU.

Applying Kepler's third law to a = 0.842 AU gives an orbital period of 0.77 yr, or about 282 days.

An eccentricity of 0.24 makes the orbit moderately elongated.

The orbital plane is tilted 12.1° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 41.5 km/s at perihelion and falls to 25.4 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 = 24 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

The current orbit solution is based on 22 observations and has a weighted RMS residual of 0.6503 arcseconds.

Condition code U = 8 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
0.8424 AU
Eccentricity
0.2404
Perihelion
0.64 AU
Aphelion
1.044913 AU
Inclination
12.1°
Orbital Period
— yr
Epoch
2453358.5
Mean Anomaly
166.43°

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-Dec-01 01:27 0.140641 AU
21039541 km
18.96 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
24.0

Orbit Quality

RMS
0.65034
Condition
8
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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