SpaceAtlas Space Object Data
NASA JPL SBDB · 453729

453729

453729 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.381 AU it takes 1.62 yr to circle the Sun.

Apollo Observations: 430
Orbital Period · P
1.62 yr
v(q)
33.7 km/s
v(Q)
19.1 km/s
Diameter · ≈
0.61 km
TJ
4.7
Eccentricity · e
0.278

Orbit and dynamics

Between its closest point (0.997 AU) and its farthest (1.765 AU), the heliocentric distance changes by 0.768 AU over every revolution.

One full revolution takes 1.62 yr (593 days), computed from the semi-major axis of 1.381 AU.

An eccentricity of 0.278 makes the orbit moderately elongated.

A steep inclination of 20.37° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 33.7 km/s at perihelion and falls to 19.1 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 = 18.81 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.61 km.

Observation record and orbit quality

Astrometry from 430 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4726 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
1.381 AU
Eccentricity
0.278
Perihelion
0.997 AU
Aphelion
1.764918 AU
Inclination
20.37°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
44.52°

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
2029-Jun-27 15:46 0.051214 AU
7661574 km
12.06 km/s
2042-Jun-23 09:01 0.019422 AU
2905558 km
11.97 km/s
2055-Jun-20 08:04 0.038137 AU
5705161 km
12.01 km/s
2068-Jun-06 06:47 0.172365 AU
25785454 km
13.10 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
18.81

Orbit Quality

RMS
0.47257
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.