SpaceAtlas Space Object Data
NASA JPL SBDB · 250697

250697

250697 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.381 AU it takes 1.62 yr to circle the Sun.

Apollo Observations: 981
Orbital Period · P
1.62 yr
v(q)
40.6 km/s
v(Q)
15.8 km/s
Diameter · ≈
0.93 km
TJ
4.67
Eccentricity · e
0.4393

Orbit and dynamics

Between its closest point (0.774 AU) and its farthest (1.988 AU), the heliocentric distance changes by 1.214 AU over every revolution.

One full revolution takes 1.62 yr (593 days), computed from the semi-major axis of 1.381 AU.

The high eccentricity (0.439) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 12.65° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 40.6 km/s at perihelion and falls to 15.8 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

No direct size measurement is available; from an absolute magnitude of H = 17.91 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.93 km.

Observation record and orbit quality

Astrometry from 981 individual observations underpins this orbit; the fit leaves an RMS residual of 0.441 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
1.381 AU
Eccentricity
0.4393
Perihelion
0.774 AU
Aphelion
1.987673 AU
Inclination
12.65°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
178.49°

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
2066-Apr-27 22:28 0.125059 AU
18708526 km
15.94 km/s
2070-Nov-23 21:54 0.174389 AU
26088169 km
11.24 km/s
2079-Apr-17 02:17 0.071575 AU
10707487 km
12.72 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
17.91

Orbit Quality

RMS
0.44103
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

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