SpaceAtlas Space Object Data
NASA JPL SBDB · 591179

591179

591179 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.361 AU once every 1.59 yr.

Amor Observations: 238
Orbital Period · P
1.59 yr
v(q)
31 km/s
v(Q)
21 km/s
Diameter · ≈
0.17 km
TJ
4.83
Eccentricity · e
0.1931

Orbit and dynamics

Between its closest point (1.098 AU) and its farthest (1.624 AU), the heliocentric distance changes by 0.526 AU over every revolution.

One full revolution takes 1.59 yr (580 days), computed from the semi-major axis of 1.361 AU.

An eccentricity of 0.193 makes the orbit moderately elongated.

Its inclination of 3.87° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 31 km/s at perihelion and falls to 21 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 = 21.66 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

Astrometry from 238 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4415 arcseconds.

Condition code U = 0 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
1.361 AU
Eccentricity
0.1931
Perihelion
1.098 AU
Aphelion
1.623809 AU
Inclination
3.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
96.24°

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

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
21.66

Orbit Quality

RMS
0.44146
Condition
0
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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