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Asteroid Near-Earth

2003 RU11

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(2003 RU11)

Where is it now

Distance from Sun
0.871 AU
True anomaly
94.21°
Distance from Earth
1.832 AU
As of
20 October 2026

Two-body Kepler propagation — accurate to ~0.1% for major planets over decades, less so for highly-perturbed bodies. Use JPL Horizons for high precision.

Sun Earth — 0.996 AU from the Sun Earth 2003 RU11 — 0.871 AU from the Sun 2003 RU11
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2003 RU11 is 1.832 AU from Earth today (15.2 light-minutes).

In the sky

Right ascension
14h 24m 52s
Declination
-12° 32′ 01″
Constellation
Libra
Distance from Earth
1.83 AU
Elongation from the Sun
10.31° — too close to the Sun to observe

Visible from both hemispheres.

From your location

See how high it is right now, whether it is up after civil twilight, and when it rises and sets where you are.

How do I find my coordinates?

Google Maps on a computer

  1. Right-click the spot where you'll be observing.
  2. The first line of the menu is the coordinates, e.g. 51.50722, -0.12758 — click it and they're copied.
  3. Paste them above.

Google Maps on a phone

  1. Press and hold the spot to drop a pin.
  2. The coordinates appear in the search bar (or on the pin's card) — tap to copy, then paste above.

A full Google Maps link works too, but the short maps.app.goo.gl share links don't carry coordinates — copy the numbers instead. We round to about a kilometre; that's all the sky calculation needs.

Know your what3words address? Paste it, e.g. ///filled.count.soap. This is optional — the three words are sent to what3words to convert them, and we don't store the address or the result.

Your location stays in your browser and is sent only for this calculation. Using a what3words address is optional; if you do, the three words go to what3words to be converted and we don't record them. Set a location first, then you can save an email alert for this object. See our privacy policy.

Two-body approximation, good to about a degree for the planets — enough to find the constellation and know whether it is up.

Orbital elements

Semi-major axis
0.889 AU
Eccentricity
0.1823
Inclination
4.67°
Orbital period
306 days
Perihelion
0.727 AU
Aphelion
1.051 AU
Longitude of ascending node
178.18°
Argument of periapsis
316.76°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 3.0 LD
0.0077 AU
Tisserand (Jupiter)
6.665

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
33
Data arc
3 days
First observed
14 September 2003
Last observed
17 September 2003
Residual RMS
0.81 ″
Solution · Otto Matic
14 April 2021

Visual & observation

Absolute magnitude (H)
25.5

Discovery & classification

Aten Near-Earth Object

Close approaches 90 on record

Flyby geometry
Ecliptic flyby of 2003 RU11 at 2029-03-28 00:50 UTC Top-down view of the ecliptic, Earth at the centre, for the 2029-03-28 00:50 UTC close approach of 2003 RU11. Catalogue miss distance 88.6 LD · 3.41 × 10⁷ km. The curve is the geocentric path from 2029-03-25 to 2029-03-31, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 88.6 LD · 3.41 × 10⁷ km 2029-03-28 00:50 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2029-03-28 00:50 UTC close approach of 2003 RU11. Catalogue miss distance 88.6 LD · 3.41 × 10⁷ km. The curve is the geocentric path from 2029-03-25 to 2029-03-31, with a mark at UTC midnights and an arrow for the direction of motion. The circle is the Moon’s mean orbit; the Moon is plotted at closest approach. A ray shows the Sun’s direction. The labelled distance is the full separation. The drawn radius is the part that lies in the ecliptic plane. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate.

JPL Horizons

When (UTC) Body Distance Lunar distances Relative speed
2029-03-28 00:50:00 Earth 0.2276 AU 88.6 LD 6.6 km/s
2029-09-18 20:32:00 Earth 0.1418 AU 55.2 LD 8.5 km/s
2034-04-30 07:58:00 Earth 0.181 AU 70.4 LD 4.3 km/s
2034-09-17 14:31:00 Earth 0.0097 AU 3.8 LD 4.7 km/s
2035-01-27 02:15:00 Venus 0.1083 AU 42.1 LD 9.2 km/s
2039-04-17 03:52:00 Earth 0.2084 AU 81.1 LD 5.5 km/s
2039-09-20 16:40:00 Earth 0.0728 AU 28.3 LD 6.5 km/s
2044-03-26 10:42:00 Earth 0.2382 AU 92.7 LD 7 km/s
2044-09-17 22:37:00 Earth 0.1768 AU 68.8 LD 9.6 km/s
2049-01-22 09:03:00 Venus 0.1015 AU 39.5 LD 7.2 km/s

Next ten from today. 1 lunar distance = 384,400 km. Source: JPL close-approach data.

Sources