SpaceAtlas Space Object Data
NASA JPL SBDB · 2013 GY7

2013 GY7

2013 GY7 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.247 AU it takes 1.39 yr to circle the Sun.

Apollo Observations: 343
Orbital Period · P
1.39 yr
v(q)
33.7 km/s
v(Q)
21.1 km/s
Diameter · ≈
0.3 km
TJ
5
Eccentricity · e
0.2306

Orbit and dynamics

The path is an ellipse reaching 0.959 AU from the Sun at perihelion and 1.535 AU at aphelion, a radial span of 0.576 AU.

Applying Kepler's third law to a = 1.247 AU gives an orbital period of 1.39 yr, or about 509 days.

An eccentricity of 0.231 makes the orbit moderately elongated.

A steep inclination of 29.58° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 33.7 km/s at perihelion and falls to 21.1 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 = 20.4 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.3 km.

Observation record and orbit quality

The current orbit solution is based on 343 observations and has a weighted RMS residual of 0.418 arcseconds.

Condition code U = 0 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
1.247 AU
Eccentricity
0.2306
Perihelion
0.959 AU
Aphelion
1.534558 AU
Inclination
29.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
57.9°

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-Apr-18 02:05 0.334833 AU
50090375 km
15.83 km/s
2027-Sep-27 05:34 0.150941 AU
22580468 km
15.69 km/s
2034-Apr-22 05:10 0.414699 AU
62038029 km
18.02 km/s
2034-Sep-18 04:22 0.404147 AU
60459535 km
16.62 km/s
2045-Mar-30 11:46 0.458746 AU
68627458 km
15.03 km/s
2045-Oct-18 18:13 0.421651 AU
63078060 km
23.65 km/s
2052-Apr-08 09:37 0.368591 AU
55140385 km
15.05 km/s
2052-Oct-08 08:55 0.167904 AU
25118050 km
18.73 km/s
2059-Apr-16 15:07 0.331330 AU
49566236 km
15.55 km/s
2059-Sep-29 16:45 0.088342 AU
13215832 km
15.95 km/s
2066-Apr-21 17:42 0.390479 AU
58414846 km
17.41 km/s
2066-Sep-20 02:07 0.349399 AU
52269351 km
16.18 km/s
2077-Mar-29 03:40 0.472898 AU
70744508 km
15.06 km/s
2077-Oct-20 08:36 0.459200 AU
68695291 km
24.48 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
20.4

Orbit Quality

RMS
0.41803
Condition
0
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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