SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 SS2

2020 SS2

2020 SS2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.498 AU it takes 1.83 yr to circle the Sun.

Apollo Observations: 117
Orbital Period · P
1.83 yr
v(q)
34.7 km/s
v(Q)
17.1 km/s
Diameter · ≈
0.1 km
TJ
4.46
Eccentricity · e
0.3406

Orbit and dynamics

Between its closest point (0.988 AU) and its farthest (2.008 AU), the heliocentric distance changes by 1.02 AU over every revolution.

One full revolution takes 1.83 yr (670 days), computed from the semi-major axis of 1.498 AU.

An eccentricity of 0.341 makes the orbit moderately elongated.

The orbital plane is tilted 12.08° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.7 km/s at perihelion and falls to 17.1 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 = 22.77 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

Astrometry from 117 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4654 arcseconds.

Condition code U = 4 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.498 AU
Eccentricity
0.3406
Perihelion
0.988 AU
Aphelion
2.008219 AU
Inclination
12.08°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
0.29°

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-Nov-01 03:04 0.136126 AU
20364136 km
7.00 km/s
2042-Nov-03 19:57 0.157002 AU
23487162 km
6.75 km/s
2065-Jan-18 19:10 0.272167 AU
40715545 km
10.79 km/s
2076-Jan-27 17:53 0.346695 AU
51864808 km
14.17 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
22.77

Orbit Quality

RMS
0.46539
Condition
4
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.