SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 FG

2011 FG

2011 FG is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.448 AU once every 1.74 yr.

Amor Observations: 78
Orbital Period · P
1.74 yr
v(q)
28 km/s
v(Q)
21.9 km/s
Diameter · ≈
0.17 km
TJ
4.22
Eccentricity · e
0.1217

Orbit and dynamics

The path is an ellipse reaching 1.272 AU from the Sun at perihelion and 1.624 AU at aphelion, a radial span of 0.352 AU.

Applying Kepler's third law to a = 1.448 AU gives an orbital period of 1.74 yr, or about 636 days.

An eccentricity of 0.122 makes the orbit moderately elongated.

A steep inclination of 53.55° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 28 km/s at perihelion and falls to 21.9 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 = 21.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

The current orbit solution is based on 78 observations and has a weighted RMS residual of 0.583 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
1.448 AU
Eccentricity
0.1217
Perihelion
1.272 AU
Aphelion
1.624222 AU
Inclination
53.55°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
286.42°

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

No close approaches to Earth are currently on record for this object.

Physical Parameters

Diameter
— km
Albedo
—
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
21.6

Orbit Quality

RMS
0.58301
Condition
1
Orbit ID
—
Data source: NASA JPL Small-Body Database . 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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