SpaceAtlas Space Object Data
NASA JPL SBDB · 2016 UY56

2016 UY56

2016 UY56 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.326 AU it takes 1.53 yr to circle the Sun.

Apollo Observations: 138
Orbital Period · P
1.53 yr
v(q)
41.8 km/s
v(Q)
16 km/s
Diameter · ≈
0.06 km
TJ
4.83
Eccentricity · e
0.4462

Orbit and dynamics

Between its closest point (0.734 AU) and its farthest (1.918 AU), the heliocentric distance changes by 1.184 AU over every revolution.

One full revolution takes 1.53 yr (558 days), computed from the semi-major axis of 1.326 AU.

The high eccentricity (0.446) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.9° 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 16 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 = 23.93 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 138 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4245 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
1.326 AU
Eccentricity
0.4462
Perihelion
0.734 AU
Aphelion
1.917661 AU
Inclination
0.9°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
59.66°

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

Predicted close approaches to Earth, from NASA's Center for Near-Earth Object Studies (CNEOS).

Date (UTC)Miss distanceVelocity
2045-Dec-07 12:09 0.148729 AU
22249490 km
8.56 km/s
2052-Apr-22 23:26 0.067111 AU
10039630 km
10.41 km/s
2071-Nov-12 10:28 0.092702 AU
13868078 km
15.18 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
23.93

Orbit Quality

RMS
0.42451
Condition
0
Orbit ID
—
Data source: NASA JPL Small-Body Database · NASA CNEOS. 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.

Keep exploring

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