SpaceAtlas Space Object Data
NASA JPL SBDB · 2002 LY1

2002 LY1

2002 LY1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.956 AU and a period of 0.93 yr.

Aten Observations: 188
Orbital Period · P
0.93 yr
v(q)
45.4 km/s
v(Q)
20.5 km/s
Diameter · ≈
0.11 km
TJ
6.24
Eccentricity · e
0.3787

Orbit and dynamics

Between its closest point (0.594 AU) and its farthest (1.317 AU), the heliocentric distance changes by 0.723 AU over every revolution.

One full revolution takes 0.93 yr (341 days), computed from the semi-major axis of 0.956 AU.

An eccentricity of 0.379 makes the orbit moderately elongated.

Its inclination of 2.89° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 45.4 km/s at perihelion and falls to 20.5 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 = 22.48 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

Astrometry from 188 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3618 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
0.9555 AU
Eccentricity
0.3787
Perihelion
0.594 AU
Aphelion
1.317348 AU
Inclination
2.89°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
169.65°

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
2027-Feb-10 14:11 0.106117 AU
15874807 km
14.18 km/s
2030-Jun-11 11:14 0.109752 AU
16418687 km
8.37 km/s
2041-Feb-13 19:53 0.197129 AU
29490098 km
17.15 km/s
2044-May-31 01:31 0.185389 AU
27733864 km
7.64 km/s
2045-Jun-05 19:40 0.195107 AU
29187557 km
17.16 km/s
2056-Feb-09 13:25 0.127726 AU
19107554 km
7.98 km/s
2059-Jun-09 21:47 0.100775 AU
15075766 km
14.30 km/s
2070-Feb-07 05:54 0.093680 AU
14014389 km
8.90 km/s
2073-Jun-10 05:07 0.076309 AU
11415615 km
13.54 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
22.48

Orbit Quality

RMS
0.36177
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.

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