SpaceAtlas Space Object Data
NASA JPL SBDB · 2018 MC7

2018 MC7

2018 MC7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.413 AU it takes 1.68 yr to circle the Sun.

Apollo Observations: 49
Orbital Period · P
1.68 yr
v(q)
33.4 km/s
v(Q)
18.8 km/s
Diameter · ≈
0.02 km
TJ
4.68
Eccentricity · e
0.2807

Orbit and dynamics

The path is an ellipse reaching 1.017 AU from the Sun at perihelion and 1.81 AU at aphelion, a radial span of 0.793 AU.

Applying Kepler's third law to a = 1.413 AU gives an orbital period of 1.68 yr, or about 613 days.

An eccentricity of 0.281 makes the orbit moderately elongated.

The orbital plane is tilted 5.61° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.4 km/s at perihelion and falls to 18.8 km/s at aphelion.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 49 observations and has a weighted RMS residual of 0.4771 arcseconds.

Condition code U = 4 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
1.413 AU
Eccentricity
0.2807
Perihelion
1.017 AU
Aphelion
1.809629 AU
Inclination
5.61°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
268.15°

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-Mar-09 23:44 0.494379 AU
73958064 km
6.30 km/s
2028-Aug-18 08:10 0.436647 AU
65321463 km
17.37 km/s
2050-Apr-26 08:53 0.394704 AU
59046906 km
16.32 km/s
2050-Sep-28 05:04 0.472639 AU
70705844 km
5.73 km/s
2055-May-14 08:32 0.145122 AU
21709897 km
8.93 km/s
2060-Jul-02 22:55 0.020764 AU
3106211 km
5.38 km/s
2065-Mar-19 00:10 0.446575 AU
66806727 km
5.30 km/s
2065-Aug-14 13:27 0.345034 AU
51616281 km
15.07 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
26.2

Orbit Quality

RMS
0.47707
Condition
4
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.