SpaceAtlas Space Object Data
NASA JPL SBDB · 2021 PP2

2021 PP2

2021 PP2 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.138 AU once every 1.21 yr.

Amor Observations: 87
Orbital Period · P
1.21 yr
v(q)
30.4 km/s
v(Q)
25.6 km/s
Diameter · ≈
0.03 km
TJ
5.49
Eccentricity · e
0.0866

Orbit and dynamics

Between its closest point (1.04 AU) and its farthest (1.237 AU), the heliocentric distance changes by 0.197 AU over every revolution.

One full revolution takes 1.21 yr (443 days), computed from the semi-major axis of 1.138 AU.

With e = 0.087, the orbit is close to circular.

The orbital plane is tilted 10.45° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 30.4 km/s at perihelion and falls to 25.6 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 = 25.71 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.03 km.

Observation record and orbit quality

Astrometry from 87 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4115 arcseconds.

Condition code U = 6 indicates a moderately constrained orbit; predictions decades ahead still carry noticeable uncertainty.

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
1.138 AU
Eccentricity
0.0866
Perihelion
1.04 AU
Aphelion
1.236551 AU
Inclination
10.45°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
352.15°

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-27 09:07 0.245208 AU
36682558 km
6.58 km/s
2027-Aug-31 07:36 0.440596 AU
65912163 km
14.71 km/s
2032-Jul-20 05:14 0.380579 AU
56933824 km
12.91 km/s
2033-Jan-02 12:55 0.263439 AU
39409934 km
6.07 km/s
2038-Aug-14 16:24 0.003936 AU
588876 km
5.80 km/s
2044-Feb-15 17:44 0.251363 AU
37603313 km
6.81 km/s
2049-Jul-30 15:37 0.241978 AU
36199339 km
8.86 km/s
2049-Dec-02 04:50 0.262433 AU
39259365 km
4.08 km/s
2055-Mar-27 05:36 0.245429 AU
36715711 km
5.47 km/s
2055-Aug-24 05:35 0.256203 AU
38327423 km
9.84 km/s
2061-Jan-20 04:48 0.259467 AU
38815639 km
6.68 km/s
2066-Aug-11 12:44 0.019772 AU
2957845 km
5.57 km/s
2072-Mar-03 13:01 0.245606 AU
36742073 km
6.44 km/s
2072-Aug-29 14:20 0.339070 AU
50724112 km
13.76 km/s
2077-Jul-18 13:16 0.347612 AU
52002081 km
14.03 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
25.71

Orbit Quality

RMS
0.41151
Condition
6
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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