SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 TO1

2020 TO1

2020 TO1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.264 AU it takes 1.42 yr to circle the Sun.

Apollo Observations: 23
Orbital Period · P
1.42 yr
v(q)
33.4 km/s
v(Q)
21 km/s
Diameter · ≈
0.07 km
TJ
4.99
Eccentricity · e
0.2267

Orbit and dynamics

Between its closest point (0.977 AU) and its farthest (1.551 AU), the heliocentric distance changes by 0.574 AU over every revolution.

One full revolution takes 1.42 yr (519 days), computed from the semi-major axis of 1.264 AU.

An eccentricity of 0.227 makes the orbit moderately elongated.

A steep inclination of 24.42° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 33.4 km/s at perihelion and falls to 21 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 = 23.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 23 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4333 arcseconds.

Condition code U = 4 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
1.264 AU
Eccentricity
0.2267
Perihelion
0.977 AU
Aphelion
1.550549 AU
Inclination
24.42°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
310.71°

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
2030-Oct-03 15:51 0.368719 AU
55159507 km
19.48 km/s
2031-Apr-01 12:30 0.366634 AU
54847718 km
12.55 km/s
2037-Oct-07 15:53 0.297621 AU
44523435 km
12.42 km/s
2038-Mar-13 17:48 0.345301 AU
51656335 km
16.38 km/s
2047-Oct-11 00:53 0.115393 AU
17262556 km
13.87 km/s
2048-Mar-18 14:16 0.244321 AU
36549974 km
13.05 km/s
2057-Oct-03 11:05 0.366958 AU
54896191 km
19.53 km/s
2058-Apr-01 11:56 0.365797 AU
54722382 km
12.55 km/s
2064-Oct-07 15:37 0.289203 AU
43264213 km
12.42 km/s
2065-Mar-13 15:06 0.338230 AU
50598429 km
16.30 km/s
2074-Oct-10 18:16 0.116917 AU
17490461 km
13.98 km/s
2075-Mar-19 18:39 0.244240 AU
36537810 km
13.00 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
23.6

Orbit Quality

RMS
0.43325
Condition
4
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

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