SpaceAtlas Space Object Data
NASA JPL SBDB · 2001 XG1

2001 XG1

2001 XG1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.998 AU it takes 2.82 yr to circle the Sun.

Apollo Observations: 111
Orbital Period · P
2.82 yr
v(q)
42.1 km/s
v(Q)
10.5 km/s
Diameter · ≈
0.08 km
TJ
3.59
Eccentricity · e
0.6001

Orbit and dynamics

The path is an ellipse reaching 0.799 AU from the Sun at perihelion and 3.197 AU at aphelion, a radial span of 2.398 AU.

Applying Kepler's third law to a = 1.998 AU gives an orbital period of 2.82 yr, or about 1,032 days.

The high eccentricity (0.6) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.98° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 42.1 km/s at perihelion and falls to 10.5 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 = 23.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 111 observations and has a weighted RMS residual of 0.5083 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
1.998 AU
Eccentricity
0.6001
Perihelion
0.799 AU
Aphelion
3.197 AU
Inclination
2.98°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
221.06°

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
2033-Apr-18 18:31 0.096895 AU
14495349 km
16.99 km/s
2035-Nov-20 13:56 0.307728 AU
46035524 km
23.42 km/s
2050-Apr-04 17:52 0.060645 AU
9072376 km
12.53 km/s
2052-Nov-13 04:06 0.447896 AU
67004320 km
27.51 km/s
2067-Apr-01 06:57 0.079313 AU
11865112 km
11.84 km/s
2069-Nov-13 18:59 0.450668 AU
67419021 km
27.58 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
23.2

Orbit Quality

RMS
0.5083
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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