SpaceAtlas Space Object Data
NASA JPL SBDB · 451370

451370

451370 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.188 AU it takes 1.29 yr to circle the Sun.

Apollo Observations: 128
Orbital Period · P
1.29 yr
v(q)
34.6 km/s
v(Q)
21.6 km/s
Diameter · ≈
0.18 km
TJ
5.31
Eccentricity · e
0.2308

Orbit and dynamics

Between its closest point (0.914 AU) and its farthest (1.462 AU), the heliocentric distance changes by 0.548 AU over every revolution.

One full revolution takes 1.29 yr (473 days), computed from the semi-major axis of 1.188 AU.

An eccentricity of 0.231 makes the orbit moderately elongated.

The orbital plane is tilted 5.52° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.6 km/s at perihelion and falls to 21.6 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 = 21.48 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.18 km.

Observation record and orbit quality

Astrometry from 128 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5134 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
1.188 AU
Eccentricity
0.2308
Perihelion
0.914 AU
Aphelion
1.46219 AU
Inclination
5.52°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
154.65°

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-Apr-27 20:07 0.105316 AU
15755076 km
7.54 km/s
2037-Aug-15 22:20 0.066359 AU
9927234 km
5.78 km/s
2050-Apr-22 23:39 0.147339 AU
22041545 km
9.64 km/s
2059-Jul-09 16:07 0.114131 AU
17073812 km
5.88 km/s
2068-Sep-11 23:30 0.118698 AU
17756919 km
9.83 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
21.48

Orbit Quality

RMS
0.51341
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.