SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 TC2

2020 TC2

2020 TC2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.041 AU it takes 1.06 yr to circle the Sun.

Apollo Observations: 72
Orbital Period · P
1.06 yr
v(q)
44 km/s
v(Q)
19.4 km/s
Diameter · ≈
0.25 km
TJ
5.75
Eccentricity · e
0.3886

Orbit and dynamics

Between its closest point (0.637 AU) and its farthest (1.446 AU), the heliocentric distance changes by 0.809 AU over every revolution.

One full revolution takes 1.06 yr (388 days), computed from the semi-major axis of 1.041 AU.

An eccentricity of 0.389 makes the orbit moderately elongated.

A steep inclination of 24.91° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 44 km/s at perihelion and falls to 19.4 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 = 20.77 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.25 km.

Observation record and orbit quality

Astrometry from 72 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2814 arcseconds.

Condition code U = 2 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
1.041 AU
Eccentricity
0.3886
Perihelion
0.637 AU
Aphelion
1.445533 AU
Inclination
24.91°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
190.28°

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-Mar-02 04:11 0.193304 AU
28917842 km
21.59 km/s
2034-Mar-29 04:57 0.247170 AU
36976125 km
14.97 km/s
2035-May-27 22:58 0.490578 AU
73389470 km
15.26 km/s
2036-Aug-06 08:38 0.445191 AU
66599630 km
13.00 km/s
2037-Sep-25 09:52 0.088865 AU
13294085 km
16.32 km/s
2038-Oct-12 21:00 0.307261 AU
45965609 km
25.24 km/s
2050-Feb-28 22:39 0.215753 AU
32276147 km
22.25 km/s
2051-Mar-26 13:21 0.223333 AU
33410097 km
15.21 km/s
2052-May-22 06:32 0.480449 AU
71874128 km
15.28 km/s
2053-Jul-28 20:16 0.464391 AU
69471877 km
13.23 km/s
2053-Sep-25 06:52 0.488590 AU
73092071 km
12.53 km/s
2054-Sep-24 02:49 0.118158 AU
17676110 km
15.69 km/s
2055-Oct-11 14:23 0.273386 AU
40897929 km
24.31 km/s
2067-Feb-26 19:40 0.254264 AU
38037419 km
23.38 km/s
2068-Mar-21 17:25 0.187191 AU
28003395 km
15.71 km/s
2069-May-14 19:28 0.461255 AU
69002705 km
15.25 km/s
2070-Jul-18 10:06 0.486124 AU
72723068 km
13.58 km/s
2071-Sep-22 01:56 0.163603 AU
24474729 km
14.87 km/s
2072-Oct-08 17:21 0.227037 AU
33964323 km
23.07 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
20.77

Orbit Quality

RMS
0.28137
Condition
2
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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