SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 SR7

2020 SR7

2020 SR7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.272 AU it takes 3.42 yr to circle the Sun.

Apollo Observations: 125
Orbital Period · P
3.42 yr
v(q)
45.4 km/s
v(Q)
8.6 km/s
Diameter · ≈
0.13 km
TJ
3.25
Eccentricity · e
0.681

Orbit and dynamics

Between its closest point (0.725 AU) and its farthest (3.819 AU), the heliocentric distance changes by 3.094 AU over every revolution.

One full revolution takes 3.42 yr (1,251 days), computed from the semi-major axis of 2.272 AU.

The high eccentricity (0.681) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.84° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 45.4 km/s at perihelion and falls to 8.6 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 = 22.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

Astrometry from 125 individual observations underpins this orbit; the fit leaves an RMS residual of 0.451 arcseconds.

Condition code U = 6 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
2.272 AU
Eccentricity
0.681
Perihelion
0.725 AU
Aphelion
3.819232 AU
Inclination
5.84°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
216.24°

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
2038-Mar-20 10:17 0.090665 AU
13563293 km
17.08 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
22.2

Orbit Quality

RMS
0.45103
Condition
6
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.