SpaceAtlas Space Object Data
NASA JPL SBDB · 2009 SO98

2009 SO98

2009 SO98 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.22 AU it takes 1.35 yr to circle the Sun.

Apollo Observations: 51
Orbital Period · P
1.35 yr
v(q)
32.7 km/s
v(Q)
22.3 km/s
Diameter · ≈
0.05 km
TJ
5.17
Eccentricity · e
0.1887

Orbit and dynamics

Between its closest point (0.989 AU) and its farthest (1.45 AU), the heliocentric distance changes by 0.461 AU over every revolution.

One full revolution takes 1.35 yr (492 days), computed from the semi-major axis of 1.22 AU.

An eccentricity of 0.189 makes the orbit moderately elongated.

The orbital plane is tilted 18.46° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.7 km/s at perihelion and falls to 22.3 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 = 24.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

Astrometry from 51 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3947 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.22 AU
Eccentricity
0.1887
Perihelion
0.989 AU
Aphelion
1.450214 AU
Inclination
18.46°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
113.84°

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
2068-Mar-22 13:31 0.350450 AU
52426593 km
10.55 km/s
2071-Sep-18 23:28 0.197012 AU
29472604 km
14.35 km/s
2072-Mar-05 09:00 0.312409 AU
46735655 km
10.07 km/s
2075-Sep-30 18:12 0.031808 AU
4758454 km
10.29 km/s
2076-Feb-14 04:24 0.308302 AU
46121306 km
9.48 km/s
2079-Oct-11 23:51 0.186903 AU
27960282 km
11.07 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
24.3

Orbit Quality

RMS
0.39466
Condition
7
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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