SpaceAtlas Space Object Data
NASA JPL SBDB · 2023 SD3

2023 SD3

2023 SD3 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.877 AU and a period of 0.82 yr.

Aten Observations: 66
Orbital Period · P
0.82 yr
v(q)
38.6 km/s
v(Q)
26.2 km/s
Diameter · ≈
0.02 km
TJ
6.74
Eccentricity · e
0.19

Orbit and dynamics

Between its closest point (0.71 AU) and its farthest (1.044 AU), the heliocentric distance changes by 0.334 AU over every revolution.

One full revolution takes 0.82 yr (300 days), computed from the semi-major axis of 0.877 AU.

An eccentricity of 0.19 makes the orbit moderately elongated.

Its inclination of 0.75° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 38.6 km/s at perihelion and falls to 26.2 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 = 26.78 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

Astrometry from 66 individual observations underpins this orbit; the fit leaves an RMS residual of 0.5626 arcseconds.

Condition code U = 6 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
0.877 AU
Eccentricity
0.19
Perihelion
0.71 AU
Aphelion
1.04363 AU
Inclination
0.75°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
290.84°

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
2028-Apr-11 02:44 0.280846 AU
42013976 km
8.35 km/s
2028-Oct-26 01:02 0.337496 AU
50488728 km
15.11 km/s
2032-Aug-15 11:45 0.094345 AU
14113760 km
7.74 km/s
2033-Jan-27 22:34 0.230306 AU
34453276 km
6.26 km/s
2037-May-18 04:07 0.237100 AU
35469630 km
6.22 km/s
2037-Nov-02 19:53 0.115151 AU
17226354 km
8.52 km/s
2041-Aug-21 15:20 0.288522 AU
43162207 km
13.88 km/s
2042-Mar-04 03:50 0.275696 AU
41243550 km
8.34 km/s
2046-Oct-22 10:43 0.012188 AU
1823289 km
3.67 km/s
2051-Apr-06 01:58 0.280038 AU
41893155 km
8.40 km/s
2051-Oct-24 14:10 0.348987 AU
52207757 km
16.06 km/s
2055-Aug-15 17:29 0.038800 AU
5804391 km
7.27 km/s
2060-Oct-31 15:16 0.110720 AU
16563490 km
9.25 km/s
2064-Aug-19 21:27 0.244349 AU
36554131 km
12.16 km/s
2065-Feb-20 20:08 0.265883 AU
39775550 km
7.82 km/s
2069-Nov-01 14:47 0.056531 AU
8456984 km
7.43 km/s
2073-Aug-20 17:37 0.176709 AU
26435363 km
11.96 km/s
2078-Oct-31 10:19 0.057076 AU
8538515 km
9.26 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
26.78

Orbit Quality

RMS
0.56257
Condition
6
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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