SpaceAtlas Space Object Data
NASA JPL SBDB · 454100

454100

454100 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.331 AU it takes 1.54 yr to circle the Sun.

Apollo Observations: 282
Orbital Period · P
1.54 yr
v(q)
40.3 km/s
v(Q)
16.5 km/s
Diameter · ≈
0.33 km
TJ
4.83
Eccentricity · e
0.4184

Orbit and dynamics

The path is an ellipse reaching 0.774 AU from the Sun at perihelion and 1.888 AU at aphelion, a radial span of 1.114 AU.

Applying Kepler's third law to a = 1.331 AU gives an orbital period of 1.54 yr, or about 561 days.

The high eccentricity (0.418) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 4.54° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 40.3 km/s at perihelion and falls to 16.5 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

The measured diameter is 0.55 km, a value from direct size determination rather than from brightness alone.

Its geometric albedo of 0.054 indicates a very dark, carbonaceous-type surface.

Observation record and orbit quality

The current orbit solution is based on 282 observations and has a weighted RMS residual of 0.5373 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
1.331 AU
Eccentricity
0.4184
Perihelion
0.774 AU
Aphelion
1.88789 AU
Inclination
4.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
21.13°

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
2032-May-05 03:07 0.372968 AU
55795245 km
23.05 km/s
2035-May-30 22:01 0.084549 AU
12648325 km
10.25 km/s
2038-Apr-24 10:25 0.495352 AU
74103538 km
8.05 km/s
2038-Aug-27 02:20 0.239944 AU
35895167 km
10.81 km/s
2041-Nov-05 11:51 0.082882 AU
12398945 km
14.63 km/s
2055-May-18 07:40 0.132645 AU
19843448 km
15.78 km/s
2058-Jul-23 08:51 0.235213 AU
35187388 km
10.30 km/s
2061-Oct-18 10:21 0.114950 AU
17196277 km
9.21 km/s
2064-Nov-17 22:41 0.323811 AU
48441435 km
21.87 km/s
2075-May-05 08:33 0.391134 AU
58512784 km
23.59 km/s
2078-May-28 14:23 0.066001 AU
9873600 km
10.99 km/s

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

Physical Parameters

Diameter
0.548 km
Albedo
0.054
Density
— g/cm³
Rotation Period
— h
Absolute Magnitude
20.18

Orbit Quality

RMS
0.53728
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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