SpaceAtlas Space Object Data
NASA JPL SBDB · 488698

488698

488698 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.435 AU it takes 1.72 yr to circle the Sun.

Apollo Observations: 148
Orbital Period · P
1.72 yr
v(q)
56.9 km/s
v(Q)
10.9 km/s
Diameter · ≈
0.42 km
TJ
4.38
Eccentricity · e
0.6797

Orbit and dynamics

Between its closest point (0.46 AU) and its farthest (2.41 AU), the heliocentric distance changes by 1.95 AU over every revolution.

One full revolution takes 1.72 yr (628 days), computed from the semi-major axis of 1.435 AU.

The high eccentricity (0.68) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 11.58° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 56.9 km/s at perihelion and falls to 10.9 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 = 19.62 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.42 km.

Observation record and orbit quality

Astrometry from 148 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6137 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
1.435 AU
Eccentricity
0.6797
Perihelion
0.46 AU
Aphelion
2.410369 AU
Inclination
11.58°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
61.63°

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-Dec-23 04:52 0.465845 AU
69689384 km
36.00 km/s
2034-Nov-01 12:02 0.360777 AU
53971449 km
15.84 km/s
2036-Apr-24 15:35 0.123555 AU
18483543 km
20.97 km/s
2046-Nov-25 02:59 0.217781 AU
32579599 km
19.26 km/s
2048-May-02 14:55 0.288237 AU
43119623 km
15.30 km/s
2055-Apr-01 08:02 0.491680 AU
73554220 km
37.55 km/s
2058-Dec-06 04:32 0.202241 AU
30254891 km
25.14 km/s
2060-Apr-29 23:52 0.476559 AU
71292273 km
12.06 km/s
2060-Jun-13 17:13 0.458442 AU
68581887 km
16.42 km/s
2067-Apr-10 04:44 0.309602 AU
46315855 km
31.58 km/s
2070-Dec-16 06:34 0.339561 AU
50797550 km
31.41 km/s
2077-Oct-10 06:24 0.443726 AU
66380426 km
20.01 km/s
2079-Apr-19 11:09 0.135809 AU
20316673 km
25.29 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
19.62

Orbit Quality

RMS
0.61365
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.