SpaceAtlas Space Object Data
NASA JPL SBDB · 2002 JR100

2002 JR100

2002 JR100 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.923 AU and a period of 0.89 yr.

Aten Observations: 165
Orbital Period · P
0.89 yr
v(q)
42.2 km/s
v(Q)
22.8 km/s
Diameter · ≈
0.05 km
TJ
6.44
Eccentricity · e
0.299

Orbit and dynamics

The path is an ellipse reaching 0.647 AU from the Sun at perihelion and 1.199 AU at aphelion, a radial span of 0.552 AU.

Applying Kepler's third law to a = 0.923 AU gives an orbital period of 0.89 yr, or about 324 days.

An eccentricity of 0.299 makes the orbit moderately elongated.

Its inclination of 3.7° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 42.2 km/s at perihelion and falls to 22.8 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

The measured diameter is 0.03 km, a value from direct size determination rather than from brightness alone.

A geometric albedo of 0.441 points to a comparatively bright, reflective surface.

Observation record and orbit quality

The current orbit solution is based on 165 observations and has a weighted RMS residual of 0.5534 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
0.9234 AU
Eccentricity
0.299
Perihelion
0.647 AU
Aphelion
1.199497 AU
Inclination
3.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
140.62°

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-Aug-26 05:51 0.086849 AU
12992465 km
10.34 km/s
2034-May-26 23:46 0.157598 AU
23576269 km
6.04 km/s
2035-Aug-21 22:59 0.189982 AU
28420953 km
13.68 km/s
2042-Jun-22 18:57 0.193336 AU
28922729 km
6.53 km/s
2050-Jul-17 14:44 0.183131 AU
27395976 km
6.30 km/s
2057-May-02 12:55 0.125471 AU
18770188 km
11.94 km/s
2058-Aug-13 04:33 0.133311 AU
19943086 km
5.63 km/s
2065-May-01 05:36 0.100794 AU
15078642 km
11.20 km/s
2066-Aug-14 20:37 0.130462 AU
19516901 km
5.62 km/s
2073-May-03 08:01 0.167246 AU
25019572 km
13.24 km/s
2074-Jul-25 17:20 0.174047 AU
26037075 km
6.11 km/s

Distances in astronomical units (AU) and kilometres. Source: NASA/JPL CNEOS Close Approach Data API.

Physical Parameters

Diameter
0.028 km
Albedo
0.441
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
24.36

Orbit Quality

RMS
0.55342
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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