SpaceAtlas Space Object Data
NASA JPL SBDB · 450185

450185

450185 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.446 AU once every 1.74 yr.

Amor Observations: 151
Orbital Period · P
1.74 yr
v(q)
31.8 km/s
v(Q)
19.3 km/s
Diameter · ≈
0.33 km
TJ
4.51
Eccentricity · e
0.244

Orbit and dynamics

The path is an ellipse reaching 1.093 AU from the Sun at perihelion and 1.799 AU at aphelion, a radial span of 0.706 AU.

Applying Kepler's third law to a = 1.446 AU gives an orbital period of 1.74 yr, or about 635 days.

An eccentricity of 0.244 makes the orbit moderately elongated.

A steep inclination of 27.33° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 31.8 km/s at perihelion and falls to 19.3 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 = 20.14 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.33 km.

Observation record and orbit quality

The current orbit solution is based on 151 observations and has a weighted RMS residual of 0.6549 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
1.446 AU
Eccentricity
0.244
Perihelion
1.093 AU
Aphelion
1.798824 AU
Inclination
27.33°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
77.31°

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
20.14

Orbit Quality

RMS
0.65487
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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