SpaceAtlas Space Object Data
NASA JPL SBDB · 756998

756998

756998 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 2.357 AU once every 3.62 yr.

Amor Observations: 1,082
Orbital Period · P
3.62 yr
v(q)
36 km/s
v(Q)
10.5 km/s
Diameter · ≈
0.45 km
TJ
3.33
Eccentricity · e
0.5488

Orbit and dynamics

The path is an ellipse reaching 1.063 AU from the Sun at perihelion and 3.651 AU at aphelion, a radial span of 2.588 AU.

Applying Kepler's third law to a = 2.357 AU gives an orbital period of 3.62 yr, or about 1,322 days.

The high eccentricity (0.549) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.36° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 36 km/s at perihelion and falls to 10.5 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 = 19.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.45 km.

Observation record and orbit quality

The current orbit solution is based on 1,082 observations and has a weighted RMS residual of 0.3125 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
2.357 AU
Eccentricity
0.5488
Perihelion
1.063 AU
Aphelion
3.650522 AU
Inclination
4.36°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
197.0°

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
2053-May-18 21:25 0.168504 AU
25207802 km
11.34 km/s
2071-Jul-11 15:26 0.096377 AU
14417756 km
8.77 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
19.5

Orbit Quality

RMS
0.31246
Condition
0
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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