SpaceAtlas Space Object Data
NASA JPL SBDB · 678413

678413

678413 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.303 AU it takes 1.49 yr to circle the Sun.

Apollo Observations: 250
Orbital Period · P
1.49 yr
v(q)
35.8 km/s
v(Q)
19 km/s
Diameter · ≈
0.63 km
TJ
4.87
Eccentricity · e
0.3053

Orbit and dynamics

Between its closest point (0.905 AU) and its farthest (1.701 AU), the heliocentric distance changes by 0.796 AU over every revolution.

One full revolution takes 1.49 yr (543 days), computed from the semi-major axis of 1.303 AU.

An eccentricity of 0.305 makes the orbit moderately elongated.

A steep inclination of 22.73° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.8 km/s at perihelion and falls to 19 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 = 18.76 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.63 km.

Observation record and orbit quality

Astrometry from 250 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6476 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
1.303 AU
Eccentricity
0.3053
Perihelion
0.905 AU
Aphelion
1.700806 AU
Inclination
22.73°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
89.74°

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
2045-Jul-18 10:07 0.105878 AU
15839183 km
16.03 km/s
2048-Jul-11 01:09 0.027153 AU
4062064 km
13.86 km/s
2051-Jul-01 10:53 0.185895 AU
27809539 km
12.35 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
18.76

Orbit Quality

RMS
0.64761
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.