SpaceAtlas Space Object Data
NASA JPL SBDB · 612600

612600

612600 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.125 AU once every 1.19 yr.

Amor Observations: 112
Orbital Period · P
1.19 yr
v(q)
30.5 km/s
v(Q)
25.9 km/s
Diameter · ≈
0.09 km
TJ
5.55
Eccentricity · e
0.082

Orbit and dynamics

The path is an ellipse reaching 1.033 AU from the Sun at perihelion and 1.217 AU at aphelion, a radial span of 0.184 AU.

Applying Kepler's third law to a = 1.125 AU gives an orbital period of 1.19 yr, or about 436 days.

With e = 0.082, the orbit is close to circular.

Its inclination of 2.8° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 30.5 km/s at perihelion and falls to 25.9 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 23.02 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 112 observations and has a weighted RMS residual of 0.5313 arcseconds.

Condition code U = 1 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
1.125 AU
Eccentricity
0.082
Perihelion
1.033 AU
Aphelion
1.21725 AU
Inclination
2.8°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
84.24°

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-Feb-02 02:03 0.219582 AU
32848937 km
4.02 km/s
2028-Aug-11 18:04 0.381298 AU
57041382 km
12.24 km/s
2034-Mar-11 21:14 0.165804 AU
24803936 km
2.91 km/s
2034-Aug-04 14:08 0.203190 AU
30396842 km
7.06 km/s
2040-Jul-26 21:54 0.065336 AU
9774057 km
2.66 km/s
2046-Jul-21 02:44 0.051361 AU
7683470 km
1.54 km/s
2052-Jun-12 00:12 0.052630 AU
7873377 km
1.45 km/s
2058-May-31 06:33 0.080397 AU
12027181 km
3.15 km/s
2058-Aug-24 05:24 0.091287 AU
13656304 km
1.33 km/s
2064-May-22 17:55 0.224933 AU
33649455 km
7.65 km/s
2064-Oct-20 13:11 0.174960 AU
26173586 km
3.04 km/s
2070-May-15 21:40 0.401753 AU
60101444 km
12.79 km/s
2070-Nov-26 19:39 0.223754 AU
33473102 km
4.06 km/s
2076-Dec-27 14:32 0.240087 AU
35916514 km
4.43 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
23.02

Orbit Quality

RMS
0.53127
Condition
1
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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