SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 HW2

2020 HW2

2020 HW2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.814 AU and a period of 0.73 yr.

Aten Observations: 30
Orbital Period · P
0.73 yr
v(q)
48.9 km/s
v(Q)
22.3 km/s
Diameter · ≈
0.04 km
TJ
7.13
Eccentricity · e
0.3746

Orbit and dynamics

The path is an ellipse reaching 0.509 AU from the Sun at perihelion and 1.119 AU at aphelion, a radial span of 0.61 AU.

Applying Kepler's third law to a = 0.814 AU gives an orbital period of 0.73 yr, or about 268 days.

An eccentricity of 0.375 makes the orbit moderately elongated.

Its inclination of 3.28° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 48.9 km/s at perihelion and falls to 22.3 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 = 24.89 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 30 observations and has a weighted RMS residual of 0.464 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
0.8138 AU
Eccentricity
0.3746
Perihelion
0.509 AU
Aphelion
1.118649 AU
Inclination
3.28°
Orbital Period
— yr
Epoch
2458958.5
Mean Anomaly
235.21°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.89

Orbit Quality

RMS
0.46398
Condition
8
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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