SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 YM2

2018 YM2

2018 YM2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.083 AU it takes 1.13 yr to circle the Sun.

Apollo Observations: 81
Orbital Period · P
1.13 yr
v(q)
33.6 km/s
v(Q)
24.4 km/s
Diameter · ≈
0.04 km
TJ
5.65
Eccentricity · e
0.1581

Orbit and dynamics

Between its closest point (0.912 AU) and its farthest (1.254 AU), the heliocentric distance changes by 0.342 AU over every revolution.

One full revolution takes 1.13 yr (412 days), computed from the semi-major axis of 1.083 AU.

An eccentricity of 0.158 makes the orbit moderately elongated.

The orbital plane is tilted 19.58° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.6 km/s at perihelion and falls to 24.4 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 = 24.7 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 0.409 arcseconds.

Condition code U = 3 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.083 AU
Eccentricity
0.1581
Perihelion
0.912 AU
Aphelion
1.254222 AU
Inclination
19.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
163.34°

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-Jan-04 01:19 0.119320 AU
17849971 km
10.37 km/s
2028-Jun-29 01:49 0.173417 AU
25942777 km
9.86 km/s
2037-Jan-05 16:33 0.254171 AU
38023368 km
10.78 km/s
2037-Jun-24 05:44 0.097616 AU
14603123 km
10.41 km/s
2044-Dec-14 23:45 0.414153 AU
61956406 km
19.68 km/s
2045-Dec-31 14:08 0.388670 AU
58144264 km
12.09 km/s
2046-Jun-22 23:15 0.132639 AU
19842572 km
11.92 km/s
2053-Dec-21 08:31 0.265221 AU
39676469 km
16.01 km/s
2054-Aug-12 17:13 0.421571 AU
63066058 km
8.70 km/s
2055-Jun-24 11:03 0.253558 AU
37931794 km
14.60 km/s
2062-Dec-27 11:01 0.113709 AU
17010557 km
12.88 km/s
2063-Jul-19 05:38 0.335850 AU
50242472 km
9.84 km/s
2064-Jun-26 23:35 0.385690 AU
57698358 km
17.82 km/s
2072-Jan-01 02:09 0.020584 AU
3079279 km
11.05 km/s
2072-Jul-05 21:46 0.247723 AU
37058791 km
9.85 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
24.7

Orbit Quality

RMS
0.40902
Condition
3
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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