SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 GY8

2005 GY8

2005 GY8 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.045 AU it takes 2.92 yr to circle the Sun.

Apollo Observations: 115
Orbital Period · P
2.92 yr
v(q)
47.2 km/s
v(Q)
9.2 km/s
Diameter · ≈
0.15 km
TJ
3.47
Eccentricity · e
0.6741

Orbit and dynamics

The path is an ellipse reaching 0.666 AU from the Sun at perihelion and 3.424 AU at aphelion, a radial span of 2.758 AU.

Applying Kepler's third law to a = 2.045 AU gives an orbital period of 2.92 yr, or about 1,068 days.

The high eccentricity (0.674) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.83° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 47.2 km/s at perihelion and falls to 9.2 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 = 21.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.15 km.

Observation record and orbit quality

The current orbit solution is based on 115 observations and has a weighted RMS residual of 0.4966 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
2.045 AU
Eccentricity
0.6741
Perihelion
0.666 AU
Aphelion
3.423535 AU
Inclination
2.83°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
56.01°

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
2037-Oct-19 07:17 0.425527 AU
63657956 km
32.11 km/s
2040-Sep-21 04:47 0.071384 AU
10678826 km
17.21 km/s
2043-Jul-12 10:28 0.350100 AU
52374185 km
17.79 km/s
2046-Apr-29 04:14 0.176540 AU
26409951 km
14.41 km/s
2049-Mar-25 19:29 0.333532 AU
49895656 km
29.30 km/s
2075-Oct-02 01:33 0.093239 AU
13948384 km
21.86 km/s
2078-Aug-07 00:58 0.303753 AU
45440781 km
15.66 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
21.9

Orbit Quality

RMS
0.49662
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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