SpaceAtlas Space Object Data
NASA JPL SBDB · 846374

846374

846374 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.514 AU it takes 1.86 yr to circle the Sun.

Apollo Observations: 128
Orbital Period · P
1.86 yr
v(q)
39.5 km/s
v(Q)
14.8 km/s
Diameter · ≈
0.39 km
TJ
4.38
Eccentricity · e
0.4534

Orbit and dynamics

The path is an ellipse reaching 0.828 AU from the Sun at perihelion and 2.2 AU at aphelion, a radial span of 1.372 AU.

Applying Kepler's third law to a = 1.514 AU gives an orbital period of 1.86 yr, or about 680 days.

The high eccentricity (0.453) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.87° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 39.5 km/s at perihelion and falls to 14.8 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 = 19.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.39 km.

Observation record and orbit quality

The current orbit solution is based on 128 observations and has a weighted RMS residual of 0.6364 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
1.514 AU
Eccentricity
0.4534
Perihelion
0.828 AU
Aphelion
2.200448 AU
Inclination
9.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
141.3°

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
2035-Jan-23 23:02 0.158958 AU
23779712 km
10.66 km/s
2049-Oct-30 04:45 0.188736 AU
28234507 km
14.98 km/s
2062-Dec-17 12:51 0.145502 AU
21766844 km
10.76 km/s
2076-Feb-22 04:01 0.152326 AU
22787660 km
10.78 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
19.8

Orbit Quality

RMS
0.63638
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.

Keep exploring

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