SpaceAtlas Space Object Data
NASA JPL SBDB · 301844

301844

301844 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.642 AU it takes 2.10 yr to circle the Sun.

Apollo Observations: 188
Orbital Period · P
2.10 yr
v(q)
41.8 km/s
v(Q)
12.9 km/s
Diameter · ≈
0.41 km
TJ
4.12
Eccentricity · e
0.5266

Orbit and dynamics

The path is an ellipse reaching 0.777 AU from the Sun at perihelion and 2.507 AU at aphelion, a radial span of 1.73 AU.

Applying Kepler's third law to a = 1.642 AU gives an orbital period of 2.10 yr, or about 769 days.

The high eccentricity (0.527) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.93° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 41.8 km/s at perihelion and falls to 12.9 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 0.4 km, a value from direct size determination rather than from brightness alone.

Observation record and orbit quality

The current orbit solution is based on 188 observations and has a weighted RMS residual of 0.5443 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
1.642 AU
Eccentricity
0.5266
Perihelion
0.777 AU
Aphelion
2.506677 AU
Inclination
0.93°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
8.54°

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
0.4 km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.7

Orbit Quality

RMS
0.54433
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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