SpaceAtlas Space Object Data
NASA JPL SBDB · 2017 YD2

2017 YD2

2017 YD2 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.844 AU and a period of 0.78 yr.

Aten Observations: 26
Orbital Period · P
0.78 yr
v(q)
45 km/s
v(Q)
23.4 km/s
Diameter · ≈
0.01 km
TJ
6.93
Eccentricity · e
0.3165

Orbit and dynamics

Between its closest point (0.577 AU) and its farthest (1.112 AU), the heliocentric distance changes by 0.535 AU over every revolution.

One full revolution takes 0.78 yr (283 days), computed from the semi-major axis of 0.844 AU.

An eccentricity of 0.317 makes the orbit moderately elongated.

Its inclination of 1.9° keeps it close to the plane of the ecliptic.

By the vis-viva equation its orbital speed rises to 45 km/s at perihelion and falls to 23.4 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 = 28.7 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.01 km.

Observation record and orbit quality

Astrometry from 26 individual observations underpins this orbit; the fit leaves an RMS residual of 0.6748 arcseconds.

Condition code U = 6 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
0.8444 AU
Eccentricity
0.3165
Perihelion
0.577 AU
Aphelion
1.111653 AU
Inclination
1.9°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
209.75°

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-Oct-04 04:13 0.088357 AU
13217997 km
11.64 km/s
2028-Apr-08 08:15 0.398726 AU
59648607 km
13.51 km/s
2031-Jun-19 21:06 0.405883 AU
60719225 km
13.56 km/s
2031-Dec-27 09:31 0.124866 AU
18679742 km
12.84 km/s
2034-Oct-04 03:54 0.033186 AU
4964586 km
8.70 km/s
2035-Mar-28 00:05 0.376291 AU
56292329 km
12.00 km/s
2038-Jun-08 13:19 0.420001 AU
62831183 km
14.55 km/s
2038-Dec-24 07:54 0.219903 AU
32896996 km
15.91 km/s
2041-Oct-11 10:32 0.059971 AU
8971507 km
6.85 km/s
2042-Mar-16 03:46 0.347236 AU
51945826 km
10.29 km/s
2045-May-29 17:58 0.428177 AU
64054369 km
15.17 km/s
2045-Dec-20 23:54 0.301154 AU
45052010 km
18.61 km/s
2048-Oct-29 19:49 0.108243 AU
16192860 km
6.66 km/s
2049-Mar-01 09:59 0.307318 AU
45974110 km
7.88 km/s
2051-Oct-16 09:45 0.438264 AU
65563360 km
23.06 km/s
2052-May-19 09:41 0.432604 AU
64716696 km
15.50 km/s
2052-Dec-17 02:46 0.390498 AU
58417671 km
21.57 km/s
2055-Aug-18 02:50 0.265863 AU
39772522 km
4.60 km/s
2055-Nov-19 12:16 0.122980 AU
18397571 km
6.79 km/s
2058-Oct-12 09:37 0.347390 AU
51968782 km
20.08 km/s
2059-May-09 18:38 0.432356 AU
64679566 km
15.48 km/s
2059-Dec-14 00:41 0.482761 AU
72220082 km
24.55 km/s
2062-Jul-26 18:46 0.323084 AU
48332718 km
8.45 km/s
2062-Dec-09 09:50 0.091929 AU
13752456 km
6.63 km/s
2065-Oct-09 01:15 0.269420 AU
40304629 km
17.38 km/s
2066-Apr-30 00:19 0.426870 AU
63858916 km
15.17 km/s
2069-Jul-13 09:39 0.359702 AU
53810643 km
10.47 km/s
2069-Dec-24 04:12 0.036804 AU
5505747 km
7.31 km/s
2072-Oct-06 07:38 0.216044 AU
32319763 km
15.30 km/s
2073-Apr-22 14:10 0.419486 AU
62754191 km
14.74 km/s
2076-Jul-08 01:52 0.372210 AU
55681768 km
11.17 km/s
2076-Dec-26 13:55 0.005792 AU
866545 km
8.10 km/s
2079-Oct-07 12:04 0.226430 AU
33873468 km
16.32 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
28.7

Orbit Quality

RMS
0.67476
Condition
6
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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