SpaceAtlas Space Object Data
NASA JPL SBDB · 2010 TP55

2010 TP55

2010 TP55 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.354 AU it takes 3.61 yr to circle the Sun.

Apollo Observations: 67
Orbital Period · P
3.61 yr
v(q)
43.6 km/s
v(Q)
8.6 km/s
Diameter · ≈
0.28 km
TJ
3.21
Eccentricity · e
0.6687

Orbit and dynamics

The path is an ellipse reaching 0.78 AU from the Sun at perihelion and 3.928 AU at aphelion, a radial span of 3.148 AU.

Applying Kepler's third law to a = 2.354 AU gives an orbital period of 3.61 yr, or about 1,319 days.

The high eccentricity (0.669) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 3.3° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 43.6 km/s at perihelion and falls to 8.6 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 = 20.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.28 km.

Observation record and orbit quality

The current orbit solution is based on 67 observations and has a weighted RMS residual of 0.5372 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
2.354 AU
Eccentricity
0.6687
Perihelion
0.78 AU
Aphelion
3.92812 AU
Inclination
3.3°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
148.6°

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
2028-Jul-27 20:36 0.233215 AU
34888400 km
14.00 km/s
2046-Sep-01 11:54 0.189058 AU
28282664 km
13.07 km/s
2064-Aug-15 06:03 0.217360 AU
32516666 km
13.51 km/s
2075-Apr-22 18:04 0.455458 AU
68135553 km
30.32 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
20.5

Orbit Quality

RMS
0.53718
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.

Keep exploring

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