SpaceAtlas Space Object Data
NASA JPL SBDB · 2007 PS9

2007 PS9

2007 PS9 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.075 AU it takes 1.11 yr to circle the Sun.

Apollo Observations: 85
Orbital Period · P
1.11 yr
v(q)
31 km/s
v(Q)
26.6 km/s
Diameter · ≈
0.07 km
TJ
5.74
Eccentricity · e
0.0768

Orbit and dynamics

Between its closest point (0.993 AU) and its farthest (1.158 AU), the heliocentric distance changes by 0.165 AU over every revolution.

One full revolution takes 1.11 yr (407 days), computed from the semi-major axis of 1.075 AU.

With e = 0.077, the orbit is close to circular.

The orbital plane is tilted 8.7° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 31 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 = 23.5 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.07 km.

Observation record and orbit quality

Astrometry from 85 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6269 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
1.075 AU
Eccentricity
0.0768
Perihelion
0.993 AU
Aphelion
1.15756 AU
Inclination
8.7°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
259.96°

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
2027-May-06 11:12 0.221221 AU
33094160 km
2.91 km/s
2027-Dec-26 14:01 0.285504 AU
42710749 km
10.08 km/s
2036-Aug-10 04:27 0.197592 AU
29559391 km
8.54 km/s
2037-Feb-21 01:00 0.156798 AU
23456721 km
4.84 km/s
2046-Aug-11 06:43 0.036626 AU
5479163 km
4.82 km/s
2047-Jan-17 23:41 0.086478 AU
12936931 km
5.00 km/s
2056-Jul-14 08:17 0.168579 AU
25218997 km
4.47 km/s
2056-Dec-30 07:44 0.185922 AU
27813523 km
7.40 km/s
2065-Aug-07 06:32 0.309472 AU
46296340 km
11.46 km/s
2066-Mar-22 18:15 0.205535 AU
30747640 km
4.26 km/s
2066-Dec-27 12:57 0.393831 AU
58916228 km
13.31 km/s
2075-Aug-12 14:53 0.097714 AU
14617870 km
6.22 km/s
2076-Feb-02 04:26 0.108009 AU
16157964 km
4.84 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
23.5

Orbit Quality

RMS
0.62685
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.

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