SpaceAtlas Space Object Data
NASA JPL SBDB · 2004 JO1

2004 JO1

2004 JO1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.022 AU it takes 1.03 yr to circle the Sun.

Apollo Observations: 126
Orbital Period · P
1.03 yr
v(q)
49.4 km/s
v(Q)
17.6 km/s
Diameter · ≈
0.23 km
TJ
5.82
Eccentricity · e
0.475

Orbit and dynamics

The path is an ellipse reaching 0.537 AU from the Sun at perihelion and 1.507 AU at aphelion, a radial span of 0.97 AU.

Applying Kepler's third law to a = 1.022 AU gives an orbital period of 1.03 yr, or about 377 days.

The high eccentricity (0.475) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 21.58° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 49.4 km/s at perihelion and falls to 17.6 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 = 20.9 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.23 km.

Observation record and orbit quality

The current orbit solution is based on 126 observations and has a weighted RMS residual of 0.514 arcseconds.

Condition code U = 8 signals a poorly constrained orbit, so its future path should be treated as provisional.

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
1.022 AU
Eccentricity
0.475
Perihelion
0.537 AU
Aphelion
1.50745 AU
Inclination
21.58°
Orbital Period
— yr
Epoch
2453143.5
Mean Anomaly
290.49°

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-10 01:36 0.152346 AU
22790672 km
26.64 km/s
2033-May-19 12:40 0.058665 AU
8776160 km
21.00 km/s
2034-May-28 14:29 0.055420 AU
8290651 km
15.93 km/s
2035-Jun-03 15:36 0.157459 AU
23555539 km
12.13 km/s
2040-Nov-10 11:59 0.359767 AU
53820444 km
17.31 km/s
2041-Dec-08 10:36 0.259080 AU
38757769 km
16.03 km/s
2042-Dec-28 02:32 0.190947 AU
28565240 km
19.18 km/s
2044-Jan-10 17:40 0.291164 AU
43557540 km
24.57 km/s
2045-Jan-21 10:42 0.465824 AU
69686301 km
30.61 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
20.9

Orbit Quality

RMS
0.51395
Condition
8
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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