SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 TG14

2021 TG14

2021 TG14 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.185 AU it takes 1.29 yr to circle the Sun.

Apollo Observations: 58
Orbital Period · P
1.29 yr
v(q)
41.5 km/s
v(Q)
18.1 km/s
Diameter · ≈
0.01 km
TJ
5.27
Eccentricity · e
0.3933

Orbit and dynamics

Between its closest point (0.719 AU) and its farthest (1.651 AU), the heliocentric distance changes by 0.932 AU over every revolution.

One full revolution takes 1.29 yr (471 days), computed from the semi-major axis of 1.185 AU.

An eccentricity of 0.393 makes the orbit moderately elongated.

Its inclination of 2.01° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 41.5 km/s at perihelion and falls to 18.1 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 = 28.21 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 58 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5029 arcseconds.

Condition code U = 6 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
1.185 AU
Eccentricity
0.3933
Perihelion
0.719 AU
Aphelion
1.651061 AU
Inclination
2.01°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
168.55°

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
2027-Apr-16 06:39 0.017510 AU
2619472 km
12.26 km/s
2030-Dec-06 14:59 0.219127 AU
32780963 km
9.16 km/s
2034-Sep-24 10:33 0.480417 AU
71869339 km
25.64 km/s
2036-May-01 15:59 0.345090 AU
51624663 km
21.68 km/s
2039-Sep-04 03:32 0.462450 AU
69181600 km
8.95 km/s
2040-Jan-28 05:02 0.258202 AU
38626474 km
10.93 km/s
2040-May-14 04:39 0.376891 AU
56382019 km
7.56 km/s
2043-Oct-08 04:23 0.169745 AU
25393558 km
17.28 km/s
2052-Oct-21 01:41 0.001169 AU
174875 km
9.93 km/s
2058-Apr-20 04:02 0.008243 AU
1233183 km
14.41 km/s
2065-Sep-26 09:55 0.313738 AU
46934493 km
24.39 km/s
2067-May-04 07:55 0.246418 AU
36863562 km
22.73 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
28.21

Orbit Quality

RMS
0.50287
Condition
6
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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