SpaceAtlas Space Object Data
NASA JPL SBDB · 2012 YD7

2012 YD7

2012 YD7 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.879 AU and a period of 0.82 yr.

Aten Observations: 31
Orbital Period · P
0.82 yr
v(q)
39.7 km/s
v(Q)
25.4 km/s
Diameter · ≈
0.05 km
TJ
6.72
Eccentricity · e
0.2184

Orbit and dynamics

The path is an ellipse reaching 0.687 AU from the Sun at perihelion and 1.071 AU at aphelion, a radial span of 0.384 AU.

Applying Kepler's third law to a = 0.879 AU gives an orbital period of 0.82 yr, or about 301 days.

An eccentricity of 0.218 makes the orbit moderately elongated.

Its inclination of 2.54° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 39.7 km/s at perihelion and falls to 25.4 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 = 24.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.05 km.

Observation record and orbit quality

The current orbit solution is based on 31 observations and has a weighted RMS residual of 0.6119 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
0.8793 AU
Eccentricity
0.2184
Perihelion
0.687 AU
Aphelion
1.071339 AU
Inclination
2.54°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
285.14°

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
2026-Nov-10 20:05 0.042225 AU
6316739 km
7.46 km/s
2027-May-12 13:51 0.288890 AU
43217309 km
8.44 km/s
2031-Dec-21 16:38 0.092159 AU
13786836 km
5.04 km/s
2032-Apr-01 01:26 0.204895 AU
30651787 km
4.20 km/s
2036-Aug-24 20:47 0.265528 AU
39722425 km
7.11 km/s
2037-Feb-04 12:47 0.048522 AU
7258820 km
5.16 km/s
2041-Aug-01 02:35 0.304014 AU
45479823 km
9.14 km/s
2042-Feb-11 18:18 0.094829 AU
14186263 km
9.22 km/s
2045-Nov-21 09:26 0.408632 AU
61130416 km
19.29 km/s
2046-Jul-05 23:12 0.326972 AU
48914270 km
10.32 km/s
2047-Feb-05 17:09 0.295319 AU
44179102 km
15.57 km/s
2050-Nov-11 19:38 0.088844 AU
13290854 km
10.33 km/s
2051-May-27 11:33 0.301329 AU
45078146 km
9.49 km/s
2056-Apr-14 19:47 0.218284 AU
32654748 km
5.77 km/s
2060-Aug-19 20:39 0.270278 AU
40433049 km
7.61 km/s
2061-Feb-09 07:15 0.040362 AU
6038084 km
6.01 km/s
2064-Nov-22 10:05 0.424210 AU
63460960 km
20.64 km/s
2065-Jul-11 23:06 0.322102 AU
48185739 km
10.19 km/s
2066-Feb-07 03:23 0.218837 AU
32737524 km
14.02 km/s
2069-Nov-13 07:51 0.156322 AU
23385372 km
12.40 km/s
2070-Jun-05 11:21 0.314235 AU
47008848 km
9.96 km/s
2074-Nov-22 21:46 0.033673 AU
5037452 km
4.96 km/s
2075-Apr-23 07:52 0.249729 AU
37358937 km
6.69 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
24.3

Orbit Quality

RMS
0.61191
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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