SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 DT

2015 DT

2015 DT belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.101 AU it takes 3.05 yr to circle the Sun.

Apollo Observations: 171
Orbital Period · P
3.05 yr
v(q)
38.6 km/s
v(Q)
10.9 km/s
Diameter · ≈
0.09 km
TJ
3.52
Eccentricity · e
0.5588

Orbit and dynamics

Between its closest point (0.927 AU) and its farthest (3.275 AU), the heliocentric distance changes by 2.348 AU over every revolution.

One full revolution takes 3.05 yr (1,112 days), computed from the semi-major axis of 2.101 AU.

The high eccentricity (0.559) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

The orbital plane is tilted 8.72° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38.6 km/s at perihelion and falls to 10.9 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 = 23 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.09 km.

Observation record and orbit quality

Astrometry from 171 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3712 arcseconds.

Condition code U = 4 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
2.101 AU
Eccentricity
0.5588
Perihelion
0.927 AU
Aphelion
3.275039 AU
Inclination
8.72°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
239.15°

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
2073-Feb-08 05:30 0.394940 AU
59082136 km
23.40 km/s
2076-Mar-02 15:13 0.044153 AU
6605158 km
12.96 km/s
2079-May-12 08:21 0.146110 AU
21857752 km
9.57 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
23.0

Orbit Quality

RMS
0.37123
Condition
4
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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