SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 PH1

2019 PH1

2019 PH1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 2.01 AU it takes 2.85 yr to circle the Sun.

Apollo Observations: 71
Orbital Period · P
2.85 yr
v(q)
43.9 km/s
v(Q)
10 km/s
Diameter · ≈
0.04 km
TJ
3.56
Eccentricity · e
0.6278

Orbit and dynamics

Between its closest point (0.748 AU) and its farthest (3.272 AU), the heliocentric distance changes by 2.524 AU over every revolution.

One full revolution takes 2.85 yr (1,041 days), computed from the semi-major axis of 2.01 AU.

The high eccentricity (0.628) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

Its inclination of 2.05° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 43.9 km/s at perihelion and falls to 10 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 = 24.89 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 71 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3698 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
2.01 AU
Eccentricity
0.6278
Perihelion
0.748 AU
Aphelion
3.271878 AU
Inclination
2.05°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
158.96°

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
2039-Jul-04 06:54 0.210132 AU
31435350 km
12.82 km/s
2042-Mar-01 09:08 0.223860 AU
33488999 km
23.31 km/s
2056-Aug-30 02:12 0.400409 AU
59900275 km
28.37 km/s
2059-May-19 22:07 0.263557 AU
39427575 km
14.46 km/s
2062-Feb-17 22:29 0.473392 AU
70818370 km
30.63 km/s
2079-Jun-19 05:20 0.236791 AU
35423460 km
13.49 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
24.89

Orbit Quality

RMS
0.36975
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.