SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 PJ

2019 PJ

2019 PJ belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.626 AU it takes 2.07 yr to circle the Sun.

Apollo Observations: 141
Orbital Period · P
2.07 yr
v(q)
41.9 km/s
v(Q)
13 km/s
Diameter · ≈
0.06 km
TJ
4.15
Eccentricity · e
0.5265

Orbit and dynamics

Between its closest point (0.77 AU) and its farthest (2.482 AU), the heliocentric distance changes by 1.712 AU over every revolution.

One full revolution takes 2.07 yr (757 days), computed from the semi-major axis of 1.626 AU.

The high eccentricity (0.526) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 0.88° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 41.9 km/s at perihelion and falls to 13 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 = 23.78 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.06 km.

Observation record and orbit quality

Astrometry from 141 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4472 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
1.626 AU
Eccentricity
0.5265
Perihelion
0.77 AU
Aphelion
2.482089 AU
Inclination
0.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
81.43°

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
2046-Jul-23 17:38 0.421510 AU
63057039 km
26.06 km/s
2048-Aug-19 00:20 0.025684 AU
3842231 km
13.05 km/s
2050-Nov-11 16:03 0.214811 AU
32135229 km
11.67 km/s
2053-Jan-15 17:33 0.160854 AU
24063440 km
18.55 km/s
2073-Jul-21 17:59 0.462750 AU
69226358 km
27.26 km/s
2075-Aug-18 22:20 0.017029 AU
2547537 km
13.40 km/s
2077-Nov-16 12:25 0.209185 AU
31293684 km
11.48 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
23.78

Orbit Quality

RMS
0.44721
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.