SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 DY15

2003 DY15

2003 DY15 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.231 AU it takes 1.37 yr to circle the Sun.

Apollo Observations: 59
Orbital Period · P
1.37 yr
v(q)
37.7 km/s
v(Q)
19.1 km/s
Diameter · ≈
0.02 km
TJ
5.14
Eccentricity · e
0.3283

Orbit and dynamics

The path is an ellipse reaching 0.827 AU from the Sun at perihelion and 1.635 AU at aphelion, a radial span of 0.808 AU.

Applying Kepler's third law to a = 1.231 AU gives an orbital period of 1.37 yr, or about 499 days.

An eccentricity of 0.328 makes the orbit moderately elongated.

The orbital plane is tilted 6.32° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 37.7 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 = 26.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.02 km.

Observation record and orbit quality

The current orbit solution is based on 59 observations and has a weighted RMS residual of 0.7711 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
1.231 AU
Eccentricity
0.3283
Perihelion
0.827 AU
Aphelion
1.635137 AU
Inclination
6.32°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
337.03°

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
2029-Feb-10 21:02 0.390340 AU
58393996 km
22.58 km/s
2033-Sep-20 14:37 0.426776 AU
63844728 km
8.02 km/s
2037-Aug-11 18:05 0.073710 AU
11026928 km
12.29 km/s
2044-Feb-18 08:23 0.263045 AU
39350942 km
18.38 km/s
2048-Feb-10 00:22 0.328226 AU
49101961 km
5.65 km/s
2048-May-16 03:23 0.206632 AU
30911637 km
8.37 km/s
2048-Sep-02 21:58 0.340981 AU
51010024 km
6.35 km/s
2052-Aug-19 21:55 0.254073 AU
38008705 km
17.17 km/s
2059-Feb-27 03:02 0.102730 AU
15368259 km
13.12 km/s
2063-Jan-18 23:49 0.440287 AU
65866048 km
7.84 km/s
2063-Jun-30 08:00 0.169436 AU
25347216 km
6.94 km/s
2067-Aug-28 01:21 0.390841 AU
58468914 km
21.68 km/s
2074-Mar-08 06:39 0.004457 AU
666816 km
9.16 km/s
2078-Aug-07 02:24 0.055515 AU
8305000 km
9.86 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
26.3

Orbit Quality

RMS
0.77106
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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