SpaceAtlas Space Object Data
NASA JPL SBDB · 612509

612509

612509 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.324 AU it takes 1.52 yr to circle the Sun.

Apollo Observations: 86
Orbital Period · P
1.52 yr
v(q)
49.9 km/s
v(Q)
13.4 km/s
Diameter · ≈
0.15 km
TJ
4.75
Eccentricity · e
0.5755

Orbit and dynamics

Between its closest point (0.562 AU) and its farthest (2.086 AU), the heliocentric distance changes by 1.524 AU over every revolution.

One full revolution takes 1.52 yr (556 days), computed from the semi-major axis of 1.324 AU.

The high eccentricity (0.576) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.37° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 49.9 km/s at perihelion and falls to 13.4 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 = 21.89 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

Astrometry from 86 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5413 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
1.324 AU
Eccentricity
0.5755
Perihelion
0.562 AU
Aphelion
2.085962 AU
Inclination
5.37°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
135.64°

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
2031-Oct-30 01:31 0.373039 AU
55805913 km
29.08 km/s
2034-Nov-13 18:56 0.062095 AU
9289310 km
19.53 km/s
2037-Dec-06 12:39 0.251544 AU
37630489 km
10.73 km/s
2041-Jan-30 07:40 0.409159 AU
61209312 km
18.20 km/s
2044-Mar-06 01:11 0.430666 AU
64426740 km
19.47 km/s
2047-Apr-15 06:04 0.357676 AU
53507601 km
14.25 km/s
2050-Jun-02 16:43 0.093335 AU
13962756 km
15.17 km/s
2053-Jun-17 18:21 0.213966 AU
32008866 km
24.10 km/s
2060-Oct-24 09:58 0.479222 AU
71690586 km
32.40 km/s
2063-Nov-08 19:06 0.171728 AU
25690153 km
22.94 km/s
2066-Nov-25 02:54 0.151256 AU
22627638 km
13.40 km/s
2069-Nov-12 17:48 0.460470 AU
68885295 km
8.96 km/s
2070-Jan-15 03:28 0.374011 AU
55951279 km
15.86 km/s
2073-Feb-18 11:02 0.431296 AU
64520915 km
19.70 km/s
2076-Mar-23 11:21 0.410826 AU
61458714 km
17.83 km/s
2079-May-11 02:52 0.281625 AU
42130447 km
10.69 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
21.89

Orbit Quality

RMS
0.54132
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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