SpaceAtlas Space Object Data
NASA JPL SBDB · 673011

673011

673011 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.385 AU it takes 1.63 yr to circle the Sun.

Apollo Observations: 168
Orbital Period · P
1.63 yr
v(q)
60.4 km/s
v(Q)
10.6 km/s
Diameter · ≈
0.36 km
TJ
4.48
Eccentricity · e
0.7013

Orbit and dynamics

The path is an ellipse reaching 0.414 AU from the Sun at perihelion and 2.356 AU at aphelion, a radial span of 1.942 AU.

Applying Kepler's third law to a = 1.385 AU gives an orbital period of 1.63 yr, or about 595 days.

The high eccentricity (0.701) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 9.23° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 60.4 km/s at perihelion and falls to 10.6 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 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.36 km.

Observation record and orbit quality

The current orbit solution is based on 168 observations and has a weighted RMS residual of 0.4983 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
1.385 AU
Eccentricity
0.7013
Perihelion
0.414 AU
Aphelion
2.356301 AU
Inclination
9.23°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
40.78°

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
2028-Jan-07 05:12 0.054508 AU
8154243 km
22.13 km/s
2029-May-19 12:23 0.137105 AU
20510615 km
24.53 km/s
2041-Jan-16 12:45 0.182770 AU
27342064 km
29.17 km/s
2072-Jan-10 00:23 0.017685 AU
2645674 km
23.90 km/s
2073-May-23 03:09 0.135439 AU
20261382 km
22.61 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
20.0

Orbit Quality

RMS
0.49833
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.