SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 RM122

2017 RM122

2017 RM122 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.431 AU once every 1.71 yr.

Amor Observations: 34
Orbital Period · P
1.71 yr
v(q)
29 km/s
v(Q)
21.3 km/s
Diameter · ≈
0.06 km
TJ
4.67
Eccentricity · e
0.1529

Orbit and dynamics

Between its closest point (1.213 AU) and its farthest (1.65 AU), the heliocentric distance changes by 0.437 AU over every revolution.

One full revolution takes 1.71 yr (625 days), computed from the semi-major axis of 1.431 AU.

An eccentricity of 0.153 makes the orbit moderately elongated.

Its inclination of 1.31° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 29 km/s at perihelion and falls to 21.3 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 = 23.88 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 34 individual observations underpins this orbit; the fit leaves an RMS residual of 0.606 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
1.431 AU
Eccentricity
0.1529
Perihelion
1.213 AU
Aphelion
1.6498 AU
Inclination
1.31°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
42.24°

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
2029-Sep-22 02:06 0.224199 AU
33539681 km
0.94 km/s
2034-Jun-03 15:19 0.426275 AU
63769803 km
4.63 km/s
2041-Oct-03 16:19 0.246435 AU
36866198 km
1.32 km/s
2046-Jun-11 04:55 0.397909 AU
59526345 km
4.14 km/s
2053-Oct-15 14:08 0.274518 AU
41067364 km
1.91 km/s
2058-Jun-19 23:31 0.366443 AU
54819078 km
3.58 km/s
2065-Oct-27 05:12 0.306038 AU
45782576 km
2.61 km/s
2070-Jun-30 01:40 0.332059 AU
49675380 km
2.93 km/s
2077-Nov-07 04:53 0.339637 AU
50808996 km
3.33 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
23.88

Orbit Quality

RMS
0.60597
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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