SpaceAtlas Space Object Data
NASA JPL SBDB · 2020 XY4

2020 XY4

2020 XY4 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.863 AU and a period of 0.80 yr.

Aten Observations: 83
Orbital Period · P
0.80 yr
v(q)
46.2 km/s
v(Q)
22.3 km/s
Diameter · ≈
0.01 km
TJ
6.79
Eccentricity · e
0.3495

Orbit and dynamics

Between its closest point (0.561 AU) and its farthest (1.165 AU), the heliocentric distance changes by 0.604 AU over every revolution.

One full revolution takes 0.80 yr (293 days), computed from the semi-major axis of 0.863 AU.

An eccentricity of 0.349 makes the orbit moderately elongated.

Its inclination of 1.12° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 46.2 km/s at perihelion and falls to 22.3 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 = 26.93 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 83 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5535 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
0.8631 AU
Eccentricity
0.3495
Perihelion
0.561 AU
Aphelion
1.164753 AU
Inclination
1.12°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
199.86°

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
2028-Dec-15 04:25 0.080417 AU
12030189 km
7.69 km/s
2032-Dec-05 04:31 0.123380 AU
18457395 km
7.38 km/s
2036-Nov-23 04:29 0.154405 AU
23098585 km
7.58 km/s
2040-Nov-10 07:03 0.171480 AU
25652979 km
7.76 km/s
2044-Oct-29 22:19 0.172328 AU
25779976 km
7.75 km/s
2048-Oct-18 12:07 0.160248 AU
23972822 km
7.58 km/s
2052-Oct-06 11:15 0.134319 AU
20093900 km
7.36 km/s
2056-Sep-25 00:26 0.092597 AU
13852278 km
7.53 km/s
2060-Sep-18 22:47 0.041395 AU
6192634 km
8.70 km/s
2064-Sep-17 15:53 0.019652 AU
2939908 km
9.88 km/s
2068-Sep-17 18:55 0.063009 AU
9426061 km
11.58 km/s
2072-Sep-19 09:20 0.133179 AU
19923285 km
13.86 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
26.93

Orbit Quality

RMS
0.55346
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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