SpaceAtlas Space Object Data
NASA JPL SBDB · 365449

365449

365449 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.968 AU and a period of 0.95 yr.

Aten Observations: 197
Orbital Period · P
0.95 yr
v(q)
55.4 km/s
v(Q)
16.5 km/s
Diameter · ≈
0.31 km
TJ
6.09
Eccentricity · e
0.5407

Orbit and dynamics

The path is an ellipse reaching 0.445 AU from the Sun at perihelion and 1.492 AU at aphelion, a radial span of 1.047 AU.

Applying Kepler's third law to a = 0.968 AU gives an orbital period of 0.95 yr, or about 348 days.

The high eccentricity (0.541) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.22° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 55.4 km/s at perihelion and falls to 16.5 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 0.21 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.264 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 197 observations and has a weighted RMS residual of 0.5676 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
0.9684 AU
Eccentricity
0.5407
Perihelion
0.445 AU
Aphelion
1.492014 AU
Inclination
11.22°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
335.73°

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
0.215 km
Albedo
0.264
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.28

Orbit Quality

RMS
0.56761
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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