SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 OA5

2020 OA5

2020 OA5 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.901 AU and a period of 0.85 yr.

Aten Observations: 36
Orbital Period · P
0.85 yr
v(q)
37.8 km/s
v(Q)
26 km/s
Diameter · ≈
0.01 km
TJ
6.55
Eccentricity · e
0.1854

Orbit and dynamics

Between its closest point (0.734 AU) and its farthest (1.068 AU), the heliocentric distance changes by 0.334 AU over every revolution.

One full revolution takes 0.85 yr (312 days), computed from the semi-major axis of 0.901 AU.

An eccentricity of 0.185 makes the orbit moderately elongated.

A steep inclination of 20.03° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 37.8 km/s at perihelion and falls to 26 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 = 26.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 36 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3914 arcseconds.

Condition code U = 5 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
0.9006 AU
Eccentricity
0.1854
Perihelion
0.734 AU
Aphelion
1.067571 AU
Inclination
20.03°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
153.73°

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-Feb-03 10:38 0.246791 AU
36919344 km
13.79 km/s
2032-Aug-01 10:50 0.203677 AU
30469577 km
12.86 km/s
2037-Jul-05 10:12 0.433037 AU
64781394 km
16.00 km/s
2038-Jan-17 21:58 0.251363 AU
37603306 km
13.92 km/s
2038-Aug-01 19:45 0.318141 AU
47593149 km
15.53 km/s
2043-Jul-09 12:20 0.333570 AU
49901334 km
13.58 km/s
2044-Jan-03 13:38 0.273624 AU
40933529 km
13.73 km/s
2044-Jul-30 13:45 0.426629 AU
63822827 km
18.39 km/s
2049-Jul-14 14:40 0.234135 AU
35026097 km
11.69 km/s
2049-Dec-17 14:49 0.307737 AU
46036845 km
13.05 km/s
2055-Jul-20 11:48 0.147349 AU
22043168 km
10.59 km/s
2055-Nov-30 18:33 0.339755 AU
50826643 km
11.51 km/s
2061-Mar-17 12:20 0.319224 AU
47755240 km
12.05 km/s
2061-Jul-24 10:49 0.078700 AU
11773350 km
10.17 km/s
2067-Mar-05 01:03 0.292687 AU
43785346 km
12.88 km/s
2067-Jul-28 07:14 0.043603 AU
6522864 km
10.23 km/s
2073-Feb-21 21:16 0.270245 AU
40428026 km
13.33 km/s
2073-Jul-30 06:52 0.078209 AU
11699826 km
10.73 km/s
2079-Feb-08 20:51 0.250642 AU
37495575 km
13.70 km/s
2079-Aug-01 21:48 0.164058 AU
24542710 km
12.05 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
26.9

Orbit Quality

RMS
0.39144
Condition
5
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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