SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 SM2

2017 SM2

2017 SM2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.32 AU it takes 1.52 yr to circle the Sun.

Apollo Observations: 67
Orbital Period · P
1.52 yr
v(q)
36.6 km/s
v(Q)
18.4 km/s
Diameter · ≈
0.01 km
TJ
4.89
Eccentricity · e
0.3321

Orbit and dynamics

The path is an ellipse reaching 0.881 AU from the Sun at perihelion and 1.758 AU at aphelion, a radial span of 0.877 AU.

Applying Kepler's third law to a = 1.32 AU gives an orbital period of 1.52 yr, or about 554 days.

An eccentricity of 0.332 makes the orbit moderately elongated.

The orbital plane is tilted 5.81° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.6 km/s at perihelion and falls to 18.4 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 = 27.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

The current orbit solution is based on 67 observations and has a weighted RMS residual of 0.6223 arcseconds.

Condition code U = 6 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
1.32 AU
Eccentricity
0.3321
Perihelion
0.881 AU
Aphelion
1.758372 AU
Inclination
5.81°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
239.44°

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
2027-Jan-28 12:55 0.195581 AU
29258516 km
13.88 km/s
2030-Feb-07 20:57 0.388362 AU
58098176 km
20.20 km/s
2058-Aug-30 14:44 0.207135 AU
30986910 km
16.85 km/s
2061-Sep-11 22:24 0.001734 AU
259389 km
10.99 km/s
2062-Mar-07 17:07 0.403428 AU
60352034 km
7.48 km/s
2070-Jul-31 13:59 0.448104 AU
67035350 km
6.52 km/s
2071-Jan-22 09:54 0.108170 AU
16182001 km
10.55 km/s
2074-Feb-02 22:54 0.299560 AU
44813526 km
16.98 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
27.3

Orbit Quality

RMS
0.62228
Condition
6
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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