SpaceAtlas Space Object Data
NASA JPL SBDB · 2015 PS228

2015 PS228

2015 PS228 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.057 AU it takes 1.09 yr to circle the Sun.

Apollo Observations: 38
Orbital Period · P
1.09 yr
v(q)
31.5 km/s
v(Q)
26.6 km/s
Diameter · ≈
0.01 km
TJ
5.82
Eccentricity · e
0.0839

Orbit and dynamics

Between its closest point (0.968 AU) and its farthest (1.146 AU), the heliocentric distance changes by 0.178 AU over every revolution.

One full revolution takes 1.09 yr (397 days), computed from the semi-major axis of 1.057 AU.

With e = 0.084, the orbit is close to circular.

Its inclination of 0.44° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 31.5 km/s at perihelion and falls to 26.6 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 = 28.8 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 38 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3746 arcseconds.

Condition code U = 5 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
1.057 AU
Eccentricity
0.0839
Perihelion
0.968 AU
Aphelion
1.145682 AU
Inclination
0.44°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
56.34°

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-Mar-16 22:59 0.136492 AU
20418923 km
6.79 km/s
2027-Nov-19 08:12 0.155958 AU
23330912 km
3.48 km/s
2028-Aug-15 09:04 0.212490 AU
31788017 km
8.95 km/s
2039-Mar-02 00:10 0.492907 AU
73737807 km
17.43 km/s
2040-Apr-19 18:21 0.029314 AU
4385285 km
1.95 km/s
2040-Sep-22 02:45 0.111905 AU
16740773 km
2.23 km/s
2041-Aug-21 07:57 0.420885 AU
62963568 km
14.90 km/s
2052-Mar-16 20:29 0.053925 AU
8067011 km
5.39 km/s
2053-Aug-15 15:30 0.240735 AU
36013516 km
10.71 km/s
2064-Mar-05 14:59 0.334761 AU
50079481 km
12.70 km/s
2065-Jan-01 17:35 0.141244 AU
21129737 km
3.13 km/s
2065-Aug-01 22:12 0.037750 AU
5647366 km
3.70 km/s
2076-Mar-12 13:23 0.195785 AU
29289019 km
9.64 km/s
2076-Dec-03 09:44 0.161371 AU
24140711 km
3.63 km/s
2077-Aug-10 23:17 0.132248 AU
19784052 km
7.76 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
28.8

Orbit Quality

RMS
0.37459
Condition
5
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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