SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 JD1

2015 JD1

2015 JD1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.218 AU it takes 1.34 yr to circle the Sun.

Apollo Observations: 628
Orbital Period · P
1.34 yr
v(q)
33.8 km/s
v(Q)
21.5 km/s
Diameter · ≈
0.27 km
TJ
5.16
Eccentricity · e
0.2226

Orbit and dynamics

The path is an ellipse reaching 0.947 AU from the Sun at perihelion and 1.489 AU at aphelion, a radial span of 0.542 AU.

Applying Kepler's third law to a = 1.218 AU gives an orbital period of 1.34 yr, or about 491 days.

An eccentricity of 0.223 makes the orbit moderately elongated.

The orbital plane is tilted 19.14° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 33.8 km/s at perihelion and falls to 21.5 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 = 20.61 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.27 km.

Observation record and orbit quality

The current orbit solution is based on 628 observations and has a weighted RMS residual of 0.3703 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
1.218 AU
Eccentricity
0.2226
Perihelion
0.947 AU
Aphelion
1.489127 AU
Inclination
19.14°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
358.85°

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
2058-Nov-01 01:58 0.034269 AU
5126504 km
11.27 km/s
2062-Nov-09 02:57 0.151928 AU
22728069 km
14.16 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
20.61

Orbit Quality

RMS
0.37028
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

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