SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 GA2

2020 GA2

2020 GA2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.281 AU it takes 1.45 yr to circle the Sun.

Apollo Observations: 269
Orbital Period · P
1.45 yr
v(q)
41.5 km/s
v(Q)
16.7 km/s
Diameter · ≈
0.21 km
TJ
4.72
Eccentricity · e
0.4269

Orbit and dynamics

The path is an ellipse reaching 0.734 AU from the Sun at perihelion and 1.828 AU at aphelion, a radial span of 1.094 AU.

Applying Kepler's third law to a = 1.281 AU gives an orbital period of 1.45 yr, or about 530 days.

The high eccentricity (0.427) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 42.98° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 41.5 km/s at perihelion and falls to 16.7 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 = 21.14 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.21 km.

Observation record and orbit quality

The current orbit solution is based on 269 observations and has a weighted RMS residual of 0.3109 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
1.281 AU
Eccentricity
0.4269
Perihelion
0.734 AU
Aphelion
1.827859 AU
Inclination
42.98°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
128.21°

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
2033-Apr-25 07:57 0.321133 AU
48040885 km
30.80 km/s
2036-Apr-03 07:51 0.264470 AU
39564145 km
21.98 km/s
2038-Oct-19 21:44 0.075512 AU
11296383 km
24.08 km/s
2049-Apr-15 09:50 0.081853 AU
12244975 km
26.15 km/s
2051-Oct-27 04:03 0.390848 AU
58470026 km
21.12 km/s
2052-Mar-29 16:28 0.499446 AU
74716100 km
21.28 km/s
2054-Oct-12 05:43 0.198340 AU
29671240 km
27.92 km/s
2062-Apr-30 21:21 0.439861 AU
65802314 km
33.46 km/s
2065-Apr-07 15:04 0.135909 AU
20331645 km
23.14 km/s
2067-Oct-23 16:59 0.181891 AU
27210547 km
22.52 km/s
2070-Oct-03 17:18 0.409734 AU
61295395 km
32.57 km/s
2078-Apr-21 10:54 0.222602 AU
33300728 km
28.76 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
21.14

Orbit Quality

RMS
0.31094
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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