SpaceAtlas Space Object Data
NASA JPL SBDB · 2011 YW10

2011 YW10

2011 YW10 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.865 AU and a period of 0.80 yr.

Aten Observations: 59
Orbital Period · P
0.80 yr
v(q)
51.5 km/s
v(Q)
19.9 km/s
Diameter · ≈
0.04 km
TJ
6.75
Eccentricity · e
0.4431

Orbit and dynamics

The path is an ellipse reaching 0.482 AU from the Sun at perihelion and 1.248 AU at aphelion, a radial span of 0.766 AU.

Applying Kepler's third law to a = 0.865 AU gives an orbital period of 0.80 yr, or about 294 days.

The high eccentricity (0.443) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.93° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 51.5 km/s at perihelion and falls to 19.9 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 = 24.64 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

The current orbit solution is based on 59 observations and has a weighted RMS residual of 0.7451 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
0.8648 AU
Eccentricity
0.4431
Perihelion
0.482 AU
Aphelion
1.247993 AU
Inclination
2.93°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
101.64°

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
2037-Mar-04 17:01 0.143544 AU
21473866 km
9.78 km/s
2041-Mar-10 19:12 0.072630 AU
10865290 km
11.48 km/s
2045-Mar-10 23:45 0.059927 AU
8964891 km
13.97 km/s
2047-Dec-11 15:10 0.127624 AU
19092210 km
17.03 km/s
2049-Mar-09 01:37 0.127699 AU
19103454 km
16.66 km/s
2051-Dec-09 18:38 0.058529 AU
8755804 km
14.85 km/s
2053-Mar-07 06:10 0.183182 AU
27403609 km
18.56 km/s
2055-Dec-09 00:52 0.007743 AU
1158271 km
13.12 km/s
2059-Dec-09 03:18 0.023970 AU
3585791 km
12.26 km/s
2063-Dec-10 18:54 0.079331 AU
11867747 km
10.74 km/s
2067-Dec-16 10:05 0.138310 AU
20690844 km
9.80 km/s
2071-Dec-25 08:06 0.187779 AU
28091408 km
9.73 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
24.64

Orbit Quality

RMS
0.74508
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.

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