SpaceAtlas Space Object Data
NASA JPL SBDB · 488453

488453

488453 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.344 AU it takes 3.59 yr to circle the Sun.

Apollo Observations: 658
Orbital Period · P
3.59 yr
v(q)
49.6 km/s
v(Q)
7.6 km/s
Diameter · ≈
0.5 km
TJ
3.13
Eccentricity · e
0.7336

Orbit and dynamics

Between its closest point (0.625 AU) and its farthest (4.064 AU), the heliocentric distance changes by 3.439 AU over every revolution.

One full revolution takes 3.59 yr (1,311 days), computed from the semi-major axis of 2.344 AU.

The high eccentricity (0.734) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.33° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 49.6 km/s at perihelion and falls to 7.6 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 = 19.24 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.5 km.

Observation record and orbit quality

Astrometry from 658 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3053 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
2.344 AU
Eccentricity
0.7336
Perihelion
0.625 AU
Aphelion
4.063558 AU
Inclination
4.33°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
287.6°

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
2030-Nov-09 08:35 0.220173 AU
32937385 km
15.07 km/s
2041-Jun-13 06:26 0.015340 AU
2294866 km
21.03 km/s
2048-Nov-21 20:44 0.120984 AU
18098969 km
17.61 km/s
2059-Jun-06 13:44 0.107691 AU
16110318 km
24.42 km/s
2066-Oct-14 07:16 0.328227 AU
49102058 km
16.99 km/s
2077-May-30 16:23 0.263068 AU
39354459 km
28.58 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
19.24

Orbit Quality

RMS
0.30527
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

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