SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 UT64

2005 UT64

2005 UT64 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.821 AU it takes 2.46 yr to circle the Sun.

Apollo Observations: 65
Orbital Period · P
2.46 yr
v(q)
39.3 km/s
v(Q)
12.4 km/s
Diameter · ≈
0.32 km
TJ
3.85
Eccentricity · e
0.5212

Orbit and dynamics

Between its closest point (0.872 AU) and its farthest (2.77 AU), the heliocentric distance changes by 1.898 AU over every revolution.

One full revolution takes 2.46 yr (898 days), computed from the semi-major axis of 1.821 AU.

The high eccentricity (0.521) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.51° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.3 km/s at perihelion and falls to 12.4 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 = 20.26 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.32 km.

Observation record and orbit quality

Astrometry from 65 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5574 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
1.821 AU
Eccentricity
0.5212
Perihelion
0.872 AU
Aphelion
2.770105 AU
Inclination
10.51°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
102.93°

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
2028-Apr-19 16:13 0.489211 AU
73184850 km
25.66 km/s
2033-Mar-10 05:32 0.052904 AU
7914356 km
11.59 km/s
2037-Nov-29 21:36 0.243413 AU
36414062 km
15.81 km/s
2060-Mar-03 16:15 0.073391 AU
10979105 km
11.06 km/s
2064-Nov-23 02:31 0.315002 AU
47123684 km
18.73 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
20.26

Orbit Quality

RMS
0.5574
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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