SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 MC4

2017 MC4

2017 MC4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.139 AU it takes 1.22 yr to circle the Sun.

Apollo Observations: 158
Orbital Period · P
1.22 yr
v(q)
61.2 km/s
v(Q)
12.7 km/s
Diameter · ≈
0.14 km
TJ
5.27
Eccentricity · e
0.6557

Orbit and dynamics

Between its closest point (0.392 AU) and its farthest (1.886 AU), the heliocentric distance changes by 1.494 AU over every revolution.

One full revolution takes 1.22 yr (444 days), computed from the semi-major axis of 1.139 AU.

The high eccentricity (0.656) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 7.08° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 61.2 km/s at perihelion and falls to 12.7 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 = 22.01 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.14 km.

Observation record and orbit quality

Astrometry from 158 individual observations underpins this orbit; the fit leaves an RMS residual of 0.2805 arcseconds.

Condition code U = 1 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
1.139 AU
Eccentricity
0.6557
Perihelion
0.392 AU
Aphelion
1.885842 AU
Inclination
7.08°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
77.0°

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-24 06:10 0.367583 AU
54989653 km
32.39 km/s
2031-Mar-07 08:21 0.208944 AU
31257625 km
15.91 km/s
2034-Jul-08 19:15 0.049744 AU
7441546 km
22.67 km/s
2037-Mar-19 12:24 0.181531 AU
27156591 km
25.51 km/s
2040-Jul-16 13:09 0.259945 AU
38887245 km
14.34 km/s
2043-Apr-03 08:54 0.466892 AU
69846016 km
35.27 km/s
2048-Jan-15 11:16 0.472388 AU
70668259 km
18.01 km/s
2048-Mar-19 17:56 0.481917 AU
72093741 km
12.98 km/s
2051-Jun-25 20:50 0.352920 AU
52796094 km
31.92 km/s
2054-Mar-07 12:49 0.203230 AU
30402811 km
16.10 km/s
2057-Jul-08 17:06 0.049694 AU
7434178 km
22.65 km/s
2060-Mar-18 23:54 0.172903 AU
25865926 km
25.15 km/s
2063-Jul-17 11:44 0.233602 AU
34946427 km
14.93 km/s
2066-Apr-01 16:09 0.433180 AU
64802808 km
34.15 km/s
2069-Jul-03 21:00 0.484579 AU
72492041 km
13.30 km/s
2069-Sep-10 20:34 0.494445 AU
73967866 km
17.44 km/s
2074-Jun-21 13:27 0.442452 AU
66189898 km
34.79 km/s
2077-Mar-06 09:14 0.305651 AU
45724807 km
13.27 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
22.01

Orbit Quality

RMS
0.28054
Condition
1
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

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