SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 OP2

2023 OP2

2023 OP2 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.374 AU it takes 1.61 yr to circle the Sun.

Apollo Observations: 75
Orbital Period · P
1.61 yr
v(q)
33.8 km/s
v(Q)
19.1 km/s
Diameter · ≈
0.09 km
TJ
4.76
Eccentricity · e
0.2785

Orbit and dynamics

The path is an ellipse reaching 0.991 AU from the Sun at perihelion and 1.757 AU at aphelion, a radial span of 0.766 AU.

Applying Kepler's third law to a = 1.374 AU gives an orbital period of 1.61 yr, or about 588 days.

An eccentricity of 0.279 makes the orbit moderately elongated.

The orbital plane is tilted 8.11° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.8 km/s at perihelion and falls to 19.1 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 = 22.99 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

The current orbit solution is based on 75 observations and has a weighted RMS residual of 0.3659 arcseconds.

Condition code U = 4 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.374 AU
Eccentricity
0.2785
Perihelion
0.991 AU
Aphelion
1.756659 AU
Inclination
8.11°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
243.06°

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
2031-Jun-16 09:10 0.418507 AU
62607695 km
6.38 km/s
2031-Nov-20 15:55 0.328408 AU
49129142 km
15.13 km/s
2044-Jul-24 02:21 0.270165 AU
40416064 km
12.60 km/s
2044-Dec-17 04:29 0.378560 AU
56631774 km
5.80 km/s
2052-Oct-31 13:21 0.111365 AU
16659972 km
5.35 km/s
2060-Jun-18 11:30 0.401982 AU
60135640 km
6.15 km/s
2060-Nov-19 00:00 0.299673 AU
44830413 km
14.36 km/s
2073-Jul-22 17:57 0.298888 AU
44712987 km
13.62 km/s
2073-Dec-21 20:17 0.399115 AU
59706775 km
6.10 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
22.99

Orbit Quality

RMS
0.36592
Condition
4
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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