SpaceAtlas Space Object Data
NASA JPL SBDB · 2003 YR1

2003 YR1

2003 YR1 is an Aten-type near-Earth asteroid whose orbit lies mostly inside that of Earth, with a semi-major axis of 0.899 AU and a period of 0.85 yr.

Aten Observations: 58
Orbital Period · P
0.85 yr
v(q)
51 km/s
v(Q)
19.3 km/s
Diameter · ≈
0.13 km
TJ
6.44
Eccentricity · e
0.4508

Orbit and dynamics

Between its closest point (0.494 AU) and its farthest (1.304 AU), the heliocentric distance changes by 0.81 AU over every revolution.

One full revolution takes 0.85 yr (311 days), computed from the semi-major axis of 0.899 AU.

The high eccentricity (0.451) produces a strongly elongated orbit, so the object spends most of its time far from the Sun.

A steep inclination of 29.33° carries it well above and below the ecliptic plane.

By the vis-viva equation its orbital speed rises to 51 km/s at perihelion and falls to 19.3 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 = 22.2 and an assumed geometric albedo of 0.14, the diameter works out to roughly 0.13 km.

Observation record and orbit quality

Astrometry from 58 individual observations underpins this orbit; the fit leaves an RMS residual of 0.3619 arcseconds.

Condition code U = 1 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
0.899 AU
Eccentricity
0.4508
Perihelion
0.494 AU
Aphelion
1.304269 AU
Inclination
29.33°
Orbital Period
— yr
Epoch
2461200.5
Mean Anomaly
42.06°

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
2026-Dec-23 14:37 0.094772 AU
14177750 km
17.65 km/s
2031-Jul-08 08:14 0.442020 AU
66125293 km
23.94 km/s
2032-Dec-21 03:20 0.129484 AU
19370569 km
21.36 km/s
2037-Jun-19 19:38 0.470054 AU
70319046 km
25.58 km/s
2037-Dec-02 16:06 0.427034 AU
63883315 km
15.68 km/s
2038-Dec-16 03:37 0.305377 AU
45683812 km
26.35 km/s
2042-Aug-26 07:02 0.470909 AU
70447008 km
21.65 km/s
2043-Dec-14 23:57 0.313062 AU
46833397 km
15.70 km/s
2044-Dec-08 15:00 0.487569 AU
72939286 km
31.87 km/s
2048-Aug-05 13:36 0.436963 AU
65368698 km
21.65 km/s
2049-Dec-22 03:07 0.169287 AU
25325047 km
16.51 km/s
2054-Jul-17 21:06 0.434193 AU
64954306 km
23.05 km/s
2055-Dec-23 14:54 0.069124 AU
10340761 km
19.20 km/s
2060-Jun-28 22:00 0.454063 AU
67926829 km
24.77 km/s
2060-Nov-25 10:22 0.471935 AU
70600432 km
15.59 km/s
2061-Dec-19 03:00 0.212687 AU
31817594 km
23.67 km/s
2066-Jun-11 11:09 0.487823 AU
72977334 km
26.25 km/s
2066-Dec-09 04:43 0.374752 AU
56062114 km
15.69 km/s
2067-Dec-13 04:10 0.396171 AU
59266277 km
29.03 km/s
2071-Aug-16 11:55 0.449583 AU
67256732 km
21.36 km/s
2072-Dec-18 22:14 0.242787 AU
36320466 km
15.92 km/s
2077-Jul-26 21:28 0.432577 AU
64712587 km
22.29 km/s
2078-Dec-23 19:11 0.095641 AU
14307705 km
17.65 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
22.2

Orbit Quality

RMS
0.36185
Condition
1
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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