SpaceAtlas Space Object Data
NASA JPL SBDB · 434740

434740

434740 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.528 AU it takes 1.89 yr to circle the Sun.

Apollo Observations: 251
Orbital Period · P
1.89 yr
v(q)
36 km/s
v(Q)
16.2 km/s
Diameter · ≈
0.45 km
TJ
4.38
Eccentricity · e
0.3798

Orbit and dynamics

The path is an ellipse reaching 0.947 AU from the Sun at perihelion and 2.108 AU at aphelion, a radial span of 1.161 AU.

Applying Kepler's third law to a = 1.528 AU gives an orbital period of 1.89 yr, or about 690 days.

An eccentricity of 0.38 makes the orbit moderately elongated.

The orbital plane is tilted 12.48° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36 km/s at perihelion and falls to 16.2 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

The measured diameter is 1 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.031 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 251 observations and has a weighted RMS residual of 0.568 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
1.528 AU
Eccentricity
0.3798
Perihelion
0.947 AU
Aphelion
2.108334 AU
Inclination
12.48°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
163.95°

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
2074-Oct-10 04:48 0.161263 AU
24124612 km
14.14 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
0.997 km
Albedo
0.031
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
19.48

Orbit Quality

RMS
0.56796
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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