SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 DP155

2015 DP155

2015 DP155 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.317 AU once every 1.51 yr.

Amor Observations: 732
Orbital Period · P
1.51 yr
v(q)
32.6 km/s
v(Q)
20.7 km/s
Diameter · ≈
0.17 km
TJ
4.93
Eccentricity · e
0.2244

Orbit and dynamics

The path is an ellipse reaching 1.022 AU from the Sun at perihelion and 1.613 AU at aphelion, a radial span of 0.591 AU.

Applying Kepler's third law to a = 1.317 AU gives an orbital period of 1.51 yr, or about 552 days.

An eccentricity of 0.224 makes the orbit moderately elongated.

The orbital plane is tilted 5.44° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 32.6 km/s at perihelion and falls to 20.7 km/s at aphelion.

Its perihelion lies just outside Earth's orbit, which is why it is classed as Earth-approaching rather than Earth-crossing.

Size and surface

No direct size measurement is available; from an absolute magnitude of H = 21.62 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.17 km.

Observation record and orbit quality

The current orbit solution is based on 732 observations and has a weighted RMS residual of 0.3912 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
1.317 AU
Eccentricity
0.2244
Perihelion
1.022 AU
Aphelion
1.612535 AU
Inclination
5.44°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
116.62°

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
2027-Feb-08 15:50 0.401038 AU
59994382 km
5.97 km/s
2027-Jul-20 02:56 0.389740 AU
58304240 km
15.11 km/s
2030-Jan-25 16:32 0.461013 AU
68966574 km
7.21 km/s
2068-Sep-19 10:01 0.457210 AU
68397634 km
6.27 km/s
2071-Apr-06 18:23 0.365375 AU
54659291 km
13.89 km/s
2071-Sep-03 12:09 0.390440 AU
58408970 km
4.78 km/s
2074-Apr-16 18:04 0.221591 AU
33149611 km
9.47 km/s
2074-Aug-04 06:57 0.300698 AU
44983743 km
2.41 km/s
2077-May-04 21:21 0.101612 AU
15201005 km
5.47 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
21.62

Orbit Quality

RMS
0.39119
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.

Keep exploring

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