SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 GA1

2015 GA1

2015 GA1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.991 AU it takes 2.81 yr to circle the Sun.

Apollo Observations: 66
Orbital Period · P
2.81 yr
v(q)
42.9 km/s
v(Q)
10.4 km/s
Diameter · ≈
0.02 km
TJ
3.59
Eccentricity · e
0.6101

Orbit and dynamics

The path is an ellipse reaching 0.776 AU from the Sun at perihelion and 3.206 AU at aphelion, a radial span of 2.43 AU.

Applying Kepler's third law to a = 1.991 AU gives an orbital period of 2.81 yr, or about 1,026 days.

The high eccentricity (0.61) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 5.16° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 42.9 km/s at perihelion and falls to 10.4 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 = 26.6 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 66 observations and has a weighted RMS residual of 0.3611 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
1.991 AU
Eccentricity
0.6101
Perihelion
0.776 AU
Aphelion
3.205709 AU
Inclination
5.16°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
331.96°

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
2029-Jun-08 09:14 0.239261 AU
35793000 km
13.31 km/s
2043-Jul-25 21:04 0.220999 AU
33061003 km
12.60 km/s
2057-Aug-30 06:56 0.073250 AU
10958080 km
14.63 km/s
2060-Mar-24 10:14 0.371482 AU
55572955 km
27.29 km/s
2071-Sep-15 11:48 0.188839 AU
28249865 km
21.42 km/s
2074-Apr-10 05:18 0.088453 AU
13232340 km
18.77 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
26.6

Orbit Quality

RMS
0.36106
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

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