SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 UT2

2023 UT2

2023 UT2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.291 AU it takes 1.47 yr to circle the Sun.

Apollo Observations: 107
Orbital Period · P
1.47 yr
v(q)
38.6 km/s
v(Q)
17.8 km/s
Diameter · ≈
0.1 km
TJ
4.89
Eccentricity · e
0.3683

Orbit and dynamics

The path is an ellipse reaching 0.815 AU from the Sun at perihelion and 1.766 AU at aphelion, a radial span of 0.951 AU.

Applying Kepler's third law to a = 1.291 AU gives an orbital period of 1.47 yr, or about 536 days.

An eccentricity of 0.368 makes the orbit moderately elongated.

A steep inclination of 21.55° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 38.6 km/s at perihelion and falls to 17.8 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 = 22.86 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

The current orbit solution is based on 107 observations and has a weighted RMS residual of 0.565 arcseconds.

Condition code U = 2 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
1.291 AU
Eccentricity
0.3683
Perihelion
0.815 AU
Aphelion
1.766475 AU
Inclination
21.55°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
327.97°

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
2029-Apr-26 09:16 0.136004 AU
20345852 km
16.29 km/s
2045-Oct-12 06:24 0.054383 AU
8135531 km
14.68 km/s
2051-Apr-23 23:57 0.199055 AU
29778232 km
18.59 km/s
2070-Apr-29 12:30 0.165913 AU
24820224 km
13.26 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
22.86

Orbit Quality

RMS
0.565
Condition
2
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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