SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 GK

2020 GK

2020 GK belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.243 AU it takes 1.39 yr to circle the Sun.

Apollo Observations: 26
Orbital Period · P
1.39 yr
v(q)
33.2 km/s
v(Q)
21.5 km/s
Diameter · ≈
0.02 km
TJ
5.14
Eccentricity · e
0.2152

Orbit and dynamics

Between its closest point (0.976 AU) and its farthest (1.51 AU), the heliocentric distance changes by 0.534 AU over every revolution.

One full revolution takes 1.39 yr (506 days), computed from the semi-major axis of 1.243 AU.

An eccentricity of 0.215 makes the orbit moderately elongated.

The orbital plane is tilted 5.71° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.2 km/s at perihelion and falls to 21.5 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 = 26.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 26 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4994 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
1.243 AU
Eccentricity
0.2152
Perihelion
0.976 AU
Aphelion
1.510494 AU
Inclination
5.71°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
190.38°

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
2027-Jan-01 08:38 0.323919 AU
48457555 km
14.09 km/s
2027-Jun-24 20:22 0.360715 AU
53962187 km
5.26 km/s
2030-Oct-15 20:56 0.407924 AU
61024515 km
7.30 km/s
2034-Aug-05 13:15 0.477274 AU
71399120 km
7.69 km/s
2038-Apr-12 01:40 0.019008 AU
2843602 km
7.11 km/s
2045-Jan-11 02:46 0.171565 AU
25665745 km
9.54 km/s
2048-Oct-02 03:00 0.456821 AU
68339449 km
7.90 km/s
2052-Jul-20 18:35 0.449164 AU
67193987 km
6.98 km/s
2055-Nov-08 00:05 0.339252 AU
50751306 km
5.86 km/s
2056-Apr-27 12:01 0.289074 AU
43244788 km
13.05 km/s
2066-Sep-20 18:11 0.476227 AU
71242618 km
8.21 km/s
2069-Dec-25 10:53 0.412150 AU
61656832 km
17.94 km/s
2070-Jul-09 05:32 0.395654 AU
59188991 km
6.25 km/s
2073-Oct-28 16:14 0.352168 AU
52683570 km
6.56 km/s
2074-May-03 11:01 0.315547 AU
47205206 km
15.71 km/s
2077-Aug-17 04:02 0.493062 AU
73761063 km
8.08 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
26.8

Orbit Quality

RMS
0.49942
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.

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