SpaceAtlas Space Object Data
NASA JPL SBDB · 2010 OA

2010 OA

2010 OA belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.97 AU it takes 2.77 yr to circle the Sun.

Apollo Observations: 187
Orbital Period · P
2.77 yr
v(q)
37.2 km/s
v(Q)
12.1 km/s
Diameter · ≈
0.31 km
TJ
3.69
Eccentricity · e
0.5099

Orbit and dynamics

Between its closest point (0.966 AU) and its farthest (2.975 AU), the heliocentric distance changes by 2.009 AU over every revolution.

One full revolution takes 2.77 yr (1,010 days), computed from the semi-major axis of 1.97 AU.

The high eccentricity (0.51) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 6.03° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.2 km/s at perihelion and falls to 12.1 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 = 20.33 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.31 km.

Observation record and orbit quality

Astrometry from 187 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4285 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
1.97 AU
Eccentricity
0.5099
Perihelion
0.966 AU
Aphelion
2.974503 AU
Inclination
6.03°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
251.27°

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
2032-Nov-22 14:56 0.455635 AU
68162054 km
22.38 km/s
2046-Jul-13 21:43 0.367316 AU
54949658 km
19.93 km/s
2057-Aug-10 05:15 0.076682 AU
11471486 km
9.62 km/s
2068-Oct-29 10:50 0.118326 AU
17701384 km
10.92 km/s
2079-Nov-24 14:00 0.465907 AU
69698721 km
22.74 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
20.33

Orbit Quality

RMS
0.42853
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.