SpaceAtlas Space Object Data
NASA JPL SBDB · 671970

671970

671970 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.836 AU it takes 2.49 yr to circle the Sun.

Apollo Observations: 136
Orbital Period · P
2.49 yr
v(q)
36.6 km/s
v(Q)
13.2 km/s
Diameter · ≈
0.35 km
TJ
3.86
Eccentricity · e
0.4696

Orbit and dynamics

The path is an ellipse reaching 0.974 AU from the Sun at perihelion and 2.698 AU at aphelion, a radial span of 1.724 AU.

Applying Kepler's third law to a = 1.836 AU gives an orbital period of 2.49 yr, or about 909 days.

The high eccentricity (0.47) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 10.93° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.6 km/s at perihelion and falls to 13.2 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

No direct size measurement is available; from an absolute magnitude of H = 20.05 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.35 km.

Observation record and orbit quality

The current orbit solution is based on 136 observations and has a weighted RMS residual of 0.5402 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
1.836 AU
Eccentricity
0.4696
Perihelion
0.974 AU
Aphelion
2.698186 AU
Inclination
10.93°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
296.98°

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-May-20 09:40 0.152223 AU
22772228 km
9.31 km/s
2034-Apr-16 14:42 0.057641 AU
8623011 km
9.25 km/s
2039-Apr-02 11:33 0.034434 AU
5151302 km
10.88 km/s
2044-Mar-16 13:57 0.223965 AU
33504645 km
15.89 km/s
2049-Mar-05 10:35 0.427297 AU
63922757 km
21.54 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
20.05

Orbit Quality

RMS
0.54016
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

Explore asteroids, comets and near-Earth objects with JPL orbital data.