SpaceAtlas Space Object Data
NASA JPL SBDB · 308242

308242

308242 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.753 AU and a period of 0.65 yr.

Aten Observations: 557
Orbital Period · P
0.65 yr
v(q)
48.9 km/s
v(Q)
24.1 km/s
Diameter · ≈
2.06 km
TJ
7.56
Eccentricity · e
0.3399

Orbit and dynamics

Between its closest point (0.497 AU) and its farthest (1.009 AU), the heliocentric distance changes by 0.512 AU over every revolution.

One full revolution takes 0.65 yr (239 days), computed from the semi-major axis of 0.753 AU.

An eccentricity of 0.34 makes the orbit moderately elongated.

A steep inclination of 24.93° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 48.9 km/s at perihelion and falls to 24.1 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 = 16.18 and an assumed geometric albedo of 0.14, the diameter works out to roughly 2.06 km.

Observation record and orbit quality

Astrometry from 557 individual observations underpins this orbit; the fit leaves an RMS residual of 0.304 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
0.7533 AU
Eccentricity
0.3399
Perihelion
0.497 AU
Aphelion
1.009347 AU
Inclination
24.93°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
348.82°

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
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
16.18

Orbit Quality

RMS
0.30404
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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