SpaceAtlas Space Object Data
NASA JPL SBDB · 2005 XY4

2005 XY4

2005 XY4 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.057 AU it takes 1.09 yr to circle the Sun.

Apollo Observations: 80
Orbital Period · P
1.09 yr
v(q)
57.8 km/s
v(Q)
14.5 km/s
Diameter · ≈
0.07 km
TJ
5.65
Eccentricity · e
0.5983

Orbit and dynamics

The path is an ellipse reaching 0.425 AU from the Sun at perihelion and 1.689 AU at aphelion, a radial span of 1.264 AU.

Applying Kepler's third law to a = 1.057 AU gives an orbital period of 1.09 yr, or about 397 days.

The high eccentricity (0.598) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 1.91° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 57.8 km/s at perihelion and falls to 14.5 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 = 23.54 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

The current orbit solution is based on 80 observations and has a weighted RMS residual of 0.5245 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
1.057 AU
Eccentricity
0.5983
Perihelion
0.425 AU
Aphelion
1.689403 AU
Inclination
1.91°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
12.21°

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
2030-Nov-27 11:09 0.112273 AU
16795761 km
16.32 km/s
2038-Mar-18 05:49 0.186103 AU
27840617 km
25.23 km/s
2043-Dec-04 15:48 0.108111 AU
16173119 km
22.66 km/s
2051-Mar-26 12:13 0.028548 AU
4270749 km
18.74 km/s
2055-Nov-26 19:03 0.183265 AU
27416121 km
14.36 km/s
2068-Dec-03 13:02 0.097630 AU
14605290 km
22.32 km/s
2076-Mar-26 20:47 0.056980 AU
8524127 km
17.87 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
23.54

Orbit Quality

RMS
0.52448
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.

Keep exploring

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