SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 SN17

2017 SN17

2017 SN17 is an Amor-type near-Earth asteroid that approaches Earth from beyond our orbit without crossing it, orbiting the Sun at 1.129 AU once every 1.20 yr.

Amor Observations: 70
Orbital Period · P
1.20 yr
v(q)
29.6 km/s
v(Q)
26.5 km/s
Diameter · ≈
0.1 km
TJ
5.46
Eccentricity · e
0.055

Orbit and dynamics

Between its closest point (1.067 AU) and its farthest (1.191 AU), the heliocentric distance changes by 0.124 AU over every revolution.

One full revolution takes 1.20 yr (438 days), computed from the semi-major axis of 1.129 AU.

With e = 0.055, the orbit is close to circular.

A steep inclination of 24.65° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 29.6 km/s at perihelion and falls to 26.5 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 = 22.77 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.1 km.

Observation record and orbit quality

Astrometry from 70 individual observations underpins this orbit; the fit leaves an RMS residual of 0.4092 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
1.129 AU
Eccentricity
0.055
Perihelion
1.067 AU
Aphelion
1.191095 AU
Inclination
24.65°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
236.12°

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
2029-Mar-30 03:15 0.394412 AU
59003144 km
17.07 km/s
2029-Oct-01 13:31 0.188607 AU
28215152 km
12.52 km/s
2035-Mar-30 17:11 0.394177 AU
58968095 km
17.07 km/s
2035-Oct-02 01:11 0.188460 AU
28193177 km
12.53 km/s
2041-Mar-30 06:37 0.395392 AU
59149859 km
17.09 km/s
2041-Oct-01 14:13 0.188259 AU
28163081 km
12.53 km/s
2047-Mar-30 18:34 0.398517 AU
59617292 km
17.14 km/s
2047-Oct-02 06:03 0.187711 AU
28081197 km
12.51 km/s
2053-Mar-30 04:41 0.402923 AU
60276371 km
17.22 km/s
2053-Oct-01 23:02 0.187084 AU
27987433 km
12.50 km/s
2059-Mar-30 15:43 0.409299 AU
61230256 km
17.34 km/s
2059-Oct-02 17:22 0.186213 AU
27857075 km
12.50 km/s
2065-Mar-30 03:28 0.416973 AU
62378338 km
17.49 km/s
2065-Oct-02 12:04 0.185531 AU
27755085 km
12.49 km/s
2071-Mar-30 14:53 0.426529 AU
63807822 km
17.66 km/s
2071-Oct-03 09:21 0.184942 AU
27666902 km
12.47 km/s
2077-Mar-29 23:39 0.437725 AU
65482734 km
17.86 km/s
2077-Oct-03 08:48 0.184740 AU
27636638 km
12.45 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
22.77

Orbit Quality

RMS
0.4092
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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