SpaceAtlas Space Object Data
NASA JPL SBDB · 741491

741491

741491 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.64 AU it takes 2.10 yr to circle the Sun.

Apollo Observations: 257
Orbital Period · P
2.10 yr
v(q)
60 km/s
v(Q)
9 km/s
Diameter · ≈
0.9 km
TJ
3.9
Eccentricity · e
0.7381

Orbit and dynamics

The path is an ellipse reaching 0.429 AU from the Sun at perihelion and 2.85 AU at aphelion, a radial span of 2.421 AU.

Applying Kepler's third law to a = 1.64 AU gives an orbital period of 2.10 yr, or about 767 days.

The high eccentricity (0.738) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 16.45° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 60 km/s at perihelion and falls to 9 km/s at aphelion.

Because q < 1 AU and Q > 1 AU, this orbit geometrically intersects the region of Earth's orbit.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 17.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.9 km.

Observation record and orbit quality

The current orbit solution is based on 257 observations and has a weighted RMS residual of 0.4816 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
1.64 AU
Eccentricity
0.7381
Perihelion
0.429 AU
Aphelion
2.850484 AU
Inclination
16.45°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
283.45°

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
2029-Feb-09 14:10 0.053908 AU
8064492 km
23.84 km/s
2050-Feb-05 00:28 0.158673 AU
23737144 km
20.89 km/s
2064-Jul-11 09:40 0.172405 AU
25791427 km
24.42 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
17.99

Orbit Quality

RMS
0.48163
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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