SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 GU4

2017 GU4

2017 GU4 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.959 AU and a period of 0.94 yr.

Aten Observations: 60
Orbital Period · P
0.94 yr
v(q)
34.6 km/s
v(Q)
26.7 km/s
Diameter · ≈
0.09 km
TJ
6.21
Eccentricity · e
0.1284

Orbit and dynamics

The path is an ellipse reaching 0.836 AU from the Sun at perihelion and 1.082 AU at aphelion, a radial span of 0.246 AU.

Applying Kepler's third law to a = 0.959 AU gives an orbital period of 0.94 yr, or about 343 days.

An eccentricity of 0.128 makes the orbit moderately elongated.

A steep inclination of 24.13° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 34.6 km/s at perihelion and falls to 26.7 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 = 22.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 60 observations and has a weighted RMS residual of 0.4274 arcseconds.

Condition code U = 7 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
0.9586 AU
Eccentricity
0.1284
Perihelion
0.836 AU
Aphelion
1.081684 AU
Inclination
24.13°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
106.7°

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
2031-Mar-18 21:16 0.363637 AU
54399273 km
16.85 km/s
2032-Mar-28 16:04 0.097622 AU
14604083 km
12.44 km/s
2033-Apr-07 12:23 0.143288 AU
21435575 km
13.83 km/s
2047-Mar-26 01:24 0.104763 AU
15672290 km
13.24 km/s
2048-Apr-04 21:08 0.101612 AU
15200899 km
12.76 km/s
2049-Apr-10 15:08 0.272876 AU
40821686 km
18.14 km/s
2062-Mar-22 20:14 0.116663 AU
17452598 km
14.43 km/s
2064-Apr-09 16:54 0.136343 AU
20396574 km
16.21 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
22.9

Orbit Quality

RMS
0.42739
Condition
7
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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