SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 VM3

2018 VM3

2018 VM3 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.419 AU it takes 1.69 yr to circle the Sun.

Apollo Observations: 201
Orbital Period · P
1.69 yr
v(q)
35.3 km/s
v(Q)
17.7 km/s
Diameter · ≈
0.19 km
TJ
4.54
Eccentricity · e
0.331

Orbit and dynamics

The path is an ellipse reaching 0.949 AU from the Sun at perihelion and 1.889 AU at aphelion, a radial span of 0.94 AU.

Applying Kepler's third law to a = 1.419 AU gives an orbital period of 1.69 yr, or about 617 days.

An eccentricity of 0.331 makes the orbit moderately elongated.

A steep inclination of 27.17° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 35.3 km/s at perihelion and falls to 17.7 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 = 21.31 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.19 km.

Observation record and orbit quality

The current orbit solution is based on 201 observations and has a weighted RMS residual of 0.5158 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
1.419 AU
Eccentricity
0.331
Perihelion
0.949 AU
Aphelion
1.888689 AU
Inclination
27.17°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
114.47°

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
2035-Nov-23 07:12 0.432133 AU
64646143 km
22.59 km/s
2040-Nov-28 02:14 0.225397 AU
33718896 km
15.24 km/s
2041-May-01 05:55 0.238232 AU
35638969 km
14.32 km/s
2045-Nov-16 23:01 0.475213 AU
71090826 km
13.86 km/s
2046-May-05 22:34 0.346237 AU
51796393 km
20.50 km/s
2062-Nov-28 02:18 0.253067 AU
37858212 km
17.59 km/s
2063-May-05 09:15 0.353317 AU
52855451 km
13.60 km/s
2067-Nov-24 08:25 0.348951 AU
52202344 km
13.95 km/s
2068-May-01 18:00 0.224505 AU
33585540 km
17.13 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
21.31

Orbit Quality

RMS
0.51575
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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