SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 UL44

2017 UL44

2017 UL44 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.877 AU and a period of 0.82 yr.

Aten Observations: 94
Orbital Period · P
0.82 yr
v(q)
43.5 km/s
v(Q)
23.2 km/s
Diameter · ≈
0.06 km
TJ
6.62
Eccentricity · e
0.3032

Orbit and dynamics

The path is an ellipse reaching 0.611 AU from the Sun at perihelion and 1.144 AU at aphelion, a radial span of 0.533 AU.

Applying Kepler's third law to a = 0.877 AU gives an orbital period of 0.82 yr, or about 300 days.

An eccentricity of 0.303 makes the orbit moderately elongated.

A steep inclination of 27.95° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 43.5 km/s at perihelion and falls to 23.2 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 = 23.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

The current orbit solution is based on 94 observations and has a weighted RMS residual of 0.5028 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
0.8775 AU
Eccentricity
0.3032
Perihelion
0.611 AU
Aphelion
1.143558 AU
Inclination
27.95°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
55.74°

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
23.8

Orbit Quality

RMS
0.50276
Condition
7
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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