SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 CE2

2021 CE2

2021 CE2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.239 AU once every 1.38 yr.

Amor Observations: 44
Orbital Period · P
1.38 yr
v(q)
29.8 km/s
v(Q)
24 km/s
Diameter · ≈
0.09 km
TJ
5.1
Eccentricity · e
0.1068

Orbit and dynamics

The path is an ellipse reaching 1.107 AU from the Sun at perihelion and 1.371 AU at aphelion, a radial span of 0.264 AU.

Applying Kepler's third law to a = 1.239 AU gives an orbital period of 1.38 yr, or about 504 days.

An eccentricity of 0.107 makes the orbit moderately elongated.

A steep inclination of 21.33° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 29.8 km/s at perihelion and falls to 24 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 22.94 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 44 observations and has a weighted RMS residual of 0.3604 arcseconds.

Condition code U = 3 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.239 AU
Eccentricity
0.1068
Perihelion
1.107 AU
Aphelion
1.371325 AU
Inclination
21.33°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
237.23°

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-Mar-07 18:15 0.492218 AU
73634700 km
15.84 km/s
2028-Aug-07 06:37 0.227647 AU
34055458 km
10.80 km/s
2032-Feb-02 01:55 0.324220 AU
48502651 km
11.03 km/s
2039-Mar-02 05:14 0.339504 AU
50789090 km
13.31 km/s
2039-Jul-30 08:26 0.231417 AU
34619477 km
11.41 km/s
2043-Jan-17 07:37 0.434861 AU
65054299 km
10.70 km/s
2046-Sep-04 17:44 0.431781 AU
64593522 km
10.48 km/s
2050-Feb-22 22:40 0.230565 AU
34492032 km
11.71 km/s
2050-Jul-23 06:41 0.334231 AU
50000250 km
12.98 km/s
2057-Aug-20 06:40 0.324243 AU
48506115 km
10.74 km/s
2061-Feb-14 02:05 0.223773 AU
33475937 km
11.10 km/s
2061-Jul-17 15:55 0.481985 AU
72103971 km
15.54 km/s
2068-Aug-08 13:58 0.234227 AU
35039893 km
10.77 km/s
2072-Feb-03 18:54 0.310426 AU
46439049 km
11.03 km/s
2079-Mar-03 06:25 0.356916 AU
53393846 km
13.58 km/s
2079-Jul-31 11:02 0.223727 AU
33469132 km
11.29 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
22.94

Orbit Quality

RMS
0.3604
Condition
3
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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