SpaceAtlas Space Object Data
NASA JPL SBDB · 2009 TP

2009 TP

2009 TP belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.029 AU it takes 1.04 yr to circle the Sun.

Apollo Observations: 31
Orbital Period · P
1.04 yr
v(q)
36.9 km/s
v(Q)
23.4 km/s
Diameter · ≈
0.07 km
TJ
5.92
Eccentricity · e
0.224

Orbit and dynamics

Between its closest point (0.799 AU) and its farthest (1.259 AU), the heliocentric distance changes by 0.46 AU over every revolution.

One full revolution takes 1.04 yr (381 days), computed from the semi-major axis of 1.029 AU.

An eccentricity of 0.224 makes the orbit moderately elongated.

Its inclination of 0.79° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 36.9 km/s at perihelion and falls to 23.4 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 = 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 31 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6333 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
1.029 AU
Eccentricity
0.224
Perihelion
0.799 AU
Aphelion
1.259496 AU
Inclination
0.79°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
265.79°

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-Sep-29 05:59 0.321239 AU
48056743 km
18.13 km/s
2032-Oct-11 06:55 0.043095 AU
6446872 km
9.96 km/s
2036-Apr-24 13:27 0.004829 AU
722355 km
5.42 km/s
2037-May-06 18:12 0.200152 AU
29942266 km
12.95 km/s
2038-May-18 21:07 0.460861 AU
68943818 km
20.44 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
0.63334
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.