SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 MC54

2015 MC54

2015 MC54 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.117 AU once every 1.18 yr.

Amor Observations: 21
Orbital Period · P
1.18 yr
v(q)
30.2 km/s
v(Q)
26.3 km/s
Diameter · ≈
0.02 km
TJ
5.58
Eccentricity · e
0.0679

Orbit and dynamics

Between its closest point (1.041 AU) and its farthest (1.193 AU), the heliocentric distance changes by 0.152 AU over every revolution.

One full revolution takes 1.18 yr (431 days), computed from the semi-major axis of 1.117 AU.

With e = 0.068, the orbit is close to circular.

Its inclination of 3.02° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.2 km/s at perihelion and falls to 26.3 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 26.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5344 arcseconds.

Condition code U = 5 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
1.117 AU
Eccentricity
0.0679
Perihelion
1.041 AU
Aphelion
1.192844 AU
Inclination
3.02°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
116.55°

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-Jun-03 07:36 0.072612 AU
10862621 km
2.99 km/s
2035-Jan-22 00:35 0.187352 AU
28027476 km
3.53 km/s
2035-Jul-01 21:29 0.334137 AU
49986210 km
9.91 km/s
2041-May-28 15:06 0.345647 AU
51708101 km
10.27 km/s
2041-Nov-04 10:08 0.188464 AU
28193830 km
3.64 km/s
2048-Jun-11 18:42 0.049764 AU
7444532 km
2.41 km/s
2054-Dec-03 14:40 0.207366 AU
31021526 km
4.18 km/s
2061-Jun-11 08:21 0.018027 AU
2696793 km
2.04 km/s
2067-May-22 23:19 0.357528 AU
53485479 km
11.13 km/s
2067-Nov-07 07:32 0.198494 AU
29694336 km
3.85 km/s
2074-Jul-09 00:20 0.291048 AU
43540188 km
11.08 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
26.8

Orbit Quality

RMS
0.53438
Condition
5
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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