SpaceAtlas Space Object Data
NASA JPL SBDB · 2010 VO21

2010 VO21

2010 VO21 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.327 AU it takes 1.53 yr to circle the Sun.

Apollo Observations: 35
Orbital Period · P
1.53 yr
v(q)
33.7 km/s
v(Q)
19.8 km/s
Diameter · ≈
0.01 km
TJ
4.9
Eccentricity · e
0.2604

Orbit and dynamics

The path is an ellipse reaching 0.982 AU from the Sun at perihelion and 1.673 AU at aphelion, a radial span of 0.691 AU.

Applying Kepler's third law to a = 1.327 AU gives an orbital period of 1.53 yr, or about 558 days.

An eccentricity of 0.26 makes the orbit moderately elongated.

Its inclination of 1.97° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 33.7 km/s at perihelion and falls to 19.8 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 = 28.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 35 observations and has a weighted RMS residual of 0.4885 arcseconds.

Condition code U = 7 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
1.327 AU
Eccentricity
0.2604
Perihelion
0.982 AU
Aphelion
1.672551 AU
Inclination
1.97°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
55.9°

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-Sep-28 21:20 0.199348 AU
29822038 km
15.15 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
28.7

Orbit Quality

RMS
0.48855
Condition
7
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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