SpaceAtlas Space Object Data
NASA JPL SBDB · 2024 TT9

2024 TT9

2024 TT9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.243 AU it takes 1.39 yr to circle the Sun.

Apollo Observations: 28
Orbital Period · P
1.39 yr
v(q)
32.3 km/s
v(Q)
22 km/s
Diameter · ≈
0.04 km
TJ
5.04
Eccentricity · e
0.1896

Orbit and dynamics

Between its closest point (1.008 AU) and its farthest (1.479 AU), the heliocentric distance changes by 0.471 AU over every revolution.

One full revolution takes 1.39 yr (506 days), computed from the semi-major axis of 1.243 AU.

An eccentricity of 0.19 makes the orbit moderately elongated.

A steep inclination of 27.38° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 32.3 km/s at perihelion and falls to 22 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 24.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 28 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5144 arcseconds.

Condition code U = 8 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.243 AU
Eccentricity
0.1896
Perihelion
1.008 AU
Aphelion
1.478673 AU
Inclination
27.38°
Orbital Period
— yr
Epoch
2460591.5
Mean Anomaly
320.69°

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-Oct-06 00:09 0.235660 AU
35254253 km
20.84 km/s
2032-Apr-04 09:20 0.349970 AU
52354711 km
13.95 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
24.66

Orbit Quality

RMS
0.51444
Condition
8
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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