SpaceAtlas Space Object Data
NASA JPL SBDB · 819229

819229

819229 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.24 AU it takes 1.38 yr to circle the Sun.

Apollo Observations: 202
Orbital Period · P
1.38 yr
v(q)
47.7 km/s
v(Q)
15 km/s
Diameter · ≈
0.24 km
TJ
5.03
Eccentricity · e
0.5216

Orbit and dynamics

Between its closest point (0.593 AU) and its farthest (1.887 AU), the heliocentric distance changes by 1.294 AU over every revolution.

One full revolution takes 1.38 yr (504 days), computed from the semi-major axis of 1.24 AU.

The high eccentricity (0.522) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.76° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 47.7 km/s at perihelion and falls to 15 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 = 20.87 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.24 km.

Observation record and orbit quality

Astrometry from 202 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4437 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
1.24 AU
Eccentricity
0.5216
Perihelion
0.593 AU
Aphelion
1.886784 AU
Inclination
4.76°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
332.52°

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
2027-Oct-08 11:37 0.106380 AU
15914270 km
13.55 km/s
2054-Apr-27 13:34 0.113610 AU
16995815 km
18.46 km/s
2056-Oct-10 03:56 0.131824 AU
19720537 km
12.55 km/s
2072-Apr-17 18:54 0.114396 AU
17113464 km
12.92 km/s
2074-Oct-01 16:48 0.095911 AU
14348105 km
17.29 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
20.87

Orbit Quality

RMS
0.44368
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.