SpaceAtlas Space Object Data
NASA JPL SBDB · 356394

356394

356394 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.009 AU it takes 2.85 yr to circle the Sun.

Apollo Observations: 338
Orbital Period · P
2.85 yr
v(q)
60.6 km/s
v(Q)
7.3 km/s
Diameter · ≈
1.14 km
TJ
3.35
Eccentricity · e
0.7855

Orbit and dynamics

Between its closest point (0.431 AU) and its farthest (3.587 AU), the heliocentric distance changes by 3.156 AU over every revolution.

One full revolution takes 2.85 yr (1,040 days), computed from the semi-major axis of 2.009 AU.

The high eccentricity (0.785) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.66° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 60.6 km/s at perihelion and falls to 7.3 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

The measured diameter is 1.07 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.152 points to a comparatively bright, reflective surface.

Observation record and orbit quality

Astrometry from 338 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4719 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
2.009 AU
Eccentricity
0.7855
Perihelion
0.431 AU
Aphelion
3.587069 AU
Inclination
10.66°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
220.2°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
1.071 km
Albedo
0.152
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
17.46

Orbit Quality

RMS
0.47188
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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.

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