SpaceAtlas Space Object Data
NASA JPL SBDB · 2002 QE47

2002 QE47

2002 QE47 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.828 AU once every 2.47 yr.

Amor Observations: 43
Orbital Period · P
2.47 yr
v(q)
32.3 km/s
v(Q)
15 km/s
Diameter · ≈
0.13 km
TJ
3.95
Eccentricity · e
0.3654

Orbit and dynamics

Between its closest point (1.16 AU) and its farthest (2.496 AU), the heliocentric distance changes by 1.336 AU over every revolution.

One full revolution takes 2.47 yr (903 days), computed from the semi-major axis of 1.828 AU.

An eccentricity of 0.365 makes the orbit moderately elongated.

Its inclination of 0.73° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 32.3 km/s at perihelion and falls to 15 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 = 22.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

Astrometry from 43 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5939 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
1.828 AU
Eccentricity
0.3654
Perihelion
1.16 AU
Aphelion
2.495951 AU
Inclination
0.73°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
188.77°

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
2044-Oct-04 01:54 0.379051 AU
56705152 km
0.39 km/s
2049-Nov-09 00:37 0.172187 AU
25758771 km
2.28 km/s
2054-Dec-10 20:14 0.342308 AU
51208549 km
0.89 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
22.2

Orbit Quality

RMS
0.5939
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.

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