SpaceAtlas Space Object Data
NASA JPL SBDB · 2000 TL1

2000 TL1

2000 TL1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.338 AU it takes 1.55 yr to circle the Sun.

Apollo Observations: 43
Orbital Period · P
1.55 yr
v(q)
35.1 km/s
v(Q)
18.9 km/s
Diameter · ≈
0.07 km
TJ
4.86
Eccentricity · e
0.3003

Orbit and dynamics

Between its closest point (0.936 AU) and its farthest (1.74 AU), the heliocentric distance changes by 0.804 AU over every revolution.

One full revolution takes 1.55 yr (565 days), computed from the semi-major axis of 1.338 AU.

An eccentricity of 0.3 makes the orbit moderately elongated.

Its inclination of 3.61° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.1 km/s at perihelion and falls to 18.9 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 = 23.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 43 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4482 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
1.338 AU
Eccentricity
0.3003
Perihelion
0.936 AU
Aphelion
1.739801 AU
Inclination
3.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
251.19°

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
2031-Jun-04 23:35 0.051132 AU
7649199 km
7.64 km/s
2031-Oct-25 22:11 0.356385 AU
53314493 km
4.48 km/s
2034-Apr-05 10:55 0.485704 AU
72660254 km
7.21 km/s
2034-Oct-05 23:08 0.239263 AU
35793251 km
14.22 km/s
2048-Jun-12 14:03 0.057908 AU
8662905 km
6.31 km/s
2051-Oct-09 12:40 0.300588 AU
44967365 km
16.06 km/s
2062-May-09 22:59 0.432446 AU
64693056 km
19.77 km/s
2065-Jul-27 03:02 0.099375 AU
14866283 km
5.77 km/s
2068-Oct-14 22:46 0.426411 AU
63790207 km
19.75 km/s
2079-May-16 18:26 0.301856 AU
45157009 km
15.93 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
23.5

Orbit Quality

RMS
0.44817
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.

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