SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 FO128

2017 FO128

2017 FO128 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.739 AU it takes 2.29 yr to circle the Sun.

Apollo Observations: 110
Orbital Period · P
2.29 yr
v(q)
40.2 km/s
v(Q)
12.7 km/s
Diameter · ≈
0.11 km
TJ
3.94
Eccentricity · e
0.5195

Orbit and dynamics

The path is an ellipse reaching 0.836 AU from the Sun at perihelion and 2.642 AU at aphelion, a radial span of 1.806 AU.

Applying Kepler's third law to a = 1.739 AU gives an orbital period of 2.29 yr, or about 838 days.

The high eccentricity (0.519) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 17.13° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40.2 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 = 22.52 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.11 km.

Observation record and orbit quality

The current orbit solution is based on 110 observations and has a weighted RMS residual of 0.5042 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
1.739 AU
Eccentricity
0.5195
Perihelion
0.836 AU
Aphelion
2.64241 AU
Inclination
17.13°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
24.86°

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
2033-Apr-10 05:58 0.448345 AU
67071436 km
26.73 km/s
2040-Jan-31 16:22 0.257141 AU
38467742 km
11.83 km/s
2056-Mar-18 11:24 0.050605 AU
7570445 km
16.32 km/s
2062-Nov-06 06:13 0.262635 AU
39289619 km
15.25 km/s
2079-Mar-01 02:06 0.141172 AU
21118988 km
12.42 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
22.52

Orbit Quality

RMS
0.50421
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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