SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 UL52

2015 UL52

2015 UL52 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.388 AU it takes 1.64 yr to circle the Sun.

Apollo Observations: 81
Orbital Period · P
1.64 yr
v(q)
34.7 km/s
v(Q)
18.4 km/s
Diameter · ≈
0.04 km
TJ
4.72
Eccentricity · e
0.3058

Orbit and dynamics

Between its closest point (0.963 AU) and its farthest (1.812 AU), the heliocentric distance changes by 0.849 AU over every revolution.

One full revolution takes 1.64 yr (597 days), computed from the semi-major axis of 1.388 AU.

An eccentricity of 0.306 makes the orbit moderately elongated.

The orbital plane is tilted 7.34° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.7 km/s at perihelion and falls to 18.4 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 = 24.89 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 81 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5821 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
1.388 AU
Eccentricity
0.3058
Perihelion
0.963 AU
Aphelion
1.81245 AU
Inclination
7.34°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
159.77°

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-Jan-27 23:38 0.260230 AU
38929845 km
15.91 km/s
2047-Jan-17 13:44 0.148733 AU
22250145 km
10.74 km/s
2051-Oct-02 06:43 0.203276 AU
30409583 km
14.28 km/s
2052-Mar-05 00:36 0.388531 AU
58123343 km
6.33 km/s
2064-Dec-14 02:13 0.111163 AU
16629701 km
5.85 km/s
2069-Sep-22 20:33 0.400152 AU
59861930 km
18.87 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
24.89

Orbit Quality

RMS
0.58212
Condition
7
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.