SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 DD

2017 DD

2017 DD belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.439 AU it takes 1.73 yr to circle the Sun.

Apollo Observations: 70
Orbital Period · P
1.73 yr
v(q)
34.3 km/s
v(Q)
18 km/s
Diameter · ≈
0.08 km
TJ
4.6
Eccentricity · e
0.3134

Orbit and dynamics

The path is an ellipse reaching 0.988 AU from the Sun at perihelion and 1.89 AU at aphelion, a radial span of 0.902 AU.

Applying Kepler's third law to a = 1.439 AU gives an orbital period of 1.73 yr, or about 630 days.

An eccentricity of 0.313 makes the orbit moderately elongated.

The orbital plane is tilted 9.13° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 34.3 km/s at perihelion and falls to 18 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 = 23.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.08 km.

Observation record and orbit quality

The current orbit solution is based on 70 observations and has a weighted RMS residual of 0.3143 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
1.439 AU
Eccentricity
0.3134
Perihelion
0.988 AU
Aphelion
1.889983 AU
Inclination
9.13°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
127.09°

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-May-16 08:26 0.410862 AU
61464115 km
17.11 km/s
2036-Feb-20 15:09 0.031005 AU
4638317 km
8.02 km/s
2048-Jan-05 05:10 0.424885 AU
63561862 km
3.72 km/s
2048-May-04 15:52 0.275539 AU
41220122 km
12.67 km/s
2055-Feb-01 00:10 0.233462 AU
34925461 km
13.74 km/s
2055-Jun-12 18:40 0.414993 AU
62082061 km
4.23 km/s
2074-Jan-20 19:40 0.375395 AU
56158307 km
19.16 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
23.2

Orbit Quality

RMS
0.31427
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.

Keep exploring

Explore asteroids, comets and near-Earth objects with JPL orbital data.