SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 SX17

2017 SX17

2017 SX17 belongs to the Apollo group of near-Earth asteroids, whose orbits cross the path of Earth; with a semi-major axis of 1.165 AU it takes 1.26 yr to circle the Sun.

Apollo Observations: 67
Orbital Period · P
1.26 yr
v(q)
35.8 km/s
v(Q)
21.3 km/s
Diameter · ≈
0.01 km
TJ
5.38
Eccentricity · e
0.2554

Orbit and dynamics

Between its closest point (0.867 AU) and its farthest (1.463 AU), the heliocentric distance changes by 0.596 AU over every revolution.

One full revolution takes 1.26 yr (459 days), computed from the semi-major axis of 1.165 AU.

An eccentricity of 0.255 makes the orbit moderately elongated.

Its inclination of 2.87° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 35.8 km/s at perihelion and falls to 21.3 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 = 28.3 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 67 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4073 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
1.165 AU
Eccentricity
0.2554
Perihelion
0.867 AU
Aphelion
1.462541 AU
Inclination
2.87°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
282.14°

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-Aug-09 16:41 0.313061 AU
46833308 km
5.61 km/s
2028-Feb-02 19:10 0.068955 AU
10315542 km
4.77 km/s
2032-Jul-20 10:24 0.378055 AU
56556202 km
6.84 km/s
2033-Feb-22 16:33 0.093423 AU
13975918 km
9.54 km/s
2037-Jul-03 18:06 0.424155 AU
63452668 km
7.63 km/s
2038-Mar-05 00:27 0.279430 AU
41802165 km
15.21 km/s
2042-Jun-17 15:42 0.448259 AU
67058539 km
8.05 km/s
2043-Mar-14 22:13 0.477063 AU
71367565 km
21.11 km/s
2046-Sep-03 15:07 0.485387 AU
72612826 km
21.15 km/s
2047-Jun-02 01:36 0.448341 AU
67070910 km
8.08 km/s
2051-Sep-13 15:14 0.293307 AU
43878165 km
15.46 km/s
2052-May-16 08:55 0.425436 AU
63644326 km
7.77 km/s
2056-Sep-23 14:47 0.102246 AU
15295822 km
9.81 km/s
2057-Apr-29 14:54 0.379735 AU
56807592 km
7.09 km/s
2061-Oct-12 20:34 0.054815 AU
8200178 km
5.14 km/s
2062-Apr-10 23:25 0.317014 AU
47424663 km
5.96 km/s
2066-Aug-27 08:56 0.255860 AU
38276102 km
4.25 km/s
2066-Dec-21 22:20 0.122158 AU
18274606 km
5.51 km/s
2071-Jul-29 08:36 0.354209 AU
52988860 km
6.40 km/s
2072-Feb-18 08:31 0.037553 AU
5617869 km
7.33 km/s
2076-Jul-04 20:43 0.423388 AU
63337974 km
7.62 km/s
2077-Mar-04 11:07 0.269299 AU
40286561 km
15.01 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
28.3

Orbit Quality

RMS
0.40732
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.

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