SpaceAtlas Space Object Data
NASA JPL SBDB · 2009 CS1

2009 CS1

2009 CS1 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.345 AU it takes 1.56 yr to circle the Sun.

Apollo Observations: 102
Orbital Period · P
1.56 yr
v(q)
36.1 km/s
v(Q)
18.3 km/s
Diameter · ≈
0.21 km
TJ
4.8
Eccentricity · e
0.3283

Orbit and dynamics

Between its closest point (0.903 AU) and its farthest (1.787 AU), the heliocentric distance changes by 0.884 AU over every revolution.

One full revolution takes 1.56 yr (570 days), computed from the semi-major axis of 1.345 AU.

An eccentricity of 0.328 makes the orbit moderately elongated.

The orbital plane is tilted 14.88° relative to the ecliptic.

By the vis-viva equation its orbital speed rises to 36.1 km/s at perihelion and falls to 18.3 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 = 21.12 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.21 km.

Observation record and orbit quality

Astrometry from 102 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6026 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
1.345 AU
Eccentricity
0.3283
Perihelion
0.903 AU
Aphelion
1.786563 AU
Inclination
14.88°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
343.91°

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
2034-Mar-01 16:11 0.123604 AU
18490840 km
13.72 km/s
2034-Aug-26 17:18 0.475387 AU
71116869 km
9.29 km/s
2037-Aug-01 07:32 0.261508 AU
39121061 km
15.94 km/s
2048-Mar-09 04:30 0.128305 AU
19194164 km
9.47 km/s
2048-Aug-10 10:23 0.350361 AU
52413318 km
8.41 km/s
2051-Aug-09 04:50 0.431269 AU
64516882 km
21.14 km/s
2059-Feb-16 01:15 0.443185 AU
66299534 km
22.68 km/s
2062-Mar-03 20:38 0.330400 AU
49427122 km
7.70 km/s
2062-Jul-27 02:55 0.201465 AU
30138717 km
8.91 km/s
2073-Feb-24 17:37 0.231486 AU
34629755 km
16.77 km/s
2076-Feb-01 18:53 0.498462 AU
74568860 km
8.63 km/s
2076-Jul-28 13:18 0.184006 AU
27526914 km
13.04 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
21.12

Orbit Quality

RMS
0.60263
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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