SpaceAtlas Space Object Data
NASA JPL SBDB · 2019 PB1

2019 PB1

2019 PB1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.266 AU it takes 1.42 yr to circle the Sun.

Apollo Observations: 21
Orbital Period · P
1.42 yr
v(q)
38 km/s
v(Q)
18.4 km/s
Diameter · ≈
0.04 km
TJ
5.02
Eccentricity · e
0.3469

Orbit and dynamics

Between its closest point (0.827 AU) and its farthest (1.705 AU), the heliocentric distance changes by 0.878 AU over every revolution.

One full revolution takes 1.42 yr (520 days), computed from the semi-major axis of 1.266 AU.

An eccentricity of 0.347 makes the orbit moderately elongated.

The orbital plane is tilted 9.95° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 38 km/s at perihelion and falls to 18.4 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 = 24.81 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.04 km.

Observation record and orbit quality

Astrometry from 21 individual observations underpins this orbit; the fit leaves an RMS residual of 0.8477 arcseconds.

Condition code U = 2 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
1.266 AU
Eccentricity
0.3469
Perihelion
0.827 AU
Aphelion
1.705175 AU
Inclination
9.95°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
337.25°

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
2029-Jan-22 07:18 0.438408 AU
65584852 km
7.95 km/s
2029-Jun-16 15:34 0.214752 AU
32126482 km
7.55 km/s
2032-Feb-02 09:22 0.491501 AU
73527551 km
25.08 km/s
2039-Apr-23 21:19 0.232189 AU
34734981 km
8.24 km/s
2039-Aug-25 10:51 0.404129 AU
60456852 km
7.22 km/s
2046-Aug-15 16:49 0.342409 AU
51223712 km
20.35 km/s
2049-Mar-01 19:32 0.098178 AU
14687204 km
8.84 km/s
2056-Aug-08 00:20 0.190357 AU
28476976 km
15.98 km/s
2059-Feb-21 12:30 0.080667 AU
12067551 km
12.85 km/s
2066-Jul-30 20:34 0.051292 AU
7673128 km
11.21 km/s
2069-Feb-12 11:59 0.257916 AU
38583653 km
18.16 km/s
2076-Jan-17 10:32 0.475476 AU
71130217 km
8.47 km/s
2076-Jul-13 06:26 0.169059 AU
25290793 km
7.11 km/s
2079-Feb-05 11:32 0.426531 AU
63808156 km
23.13 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
24.81

Orbit Quality

RMS
0.84772
Condition
2
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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