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Asteroid Near-Earth Potentially hazardous

2011 UE305

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(2011 UE305)

Where is it now

Distance from Sun
0.808 AU
True anomaly
346.28°
Distance from Earth
0.583 AU
As of
11 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.

Orbit of Mercury Orbit of Venus Orbit of Mars Sun Earth — 0.998 AU from the Sun Earth 2011 UE305 — 0.808 AU from the Sun 2011 UE305
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2011 UE305 is 0.583 AU from Earth today (4.8 light-minutes).

In the sky

Right ascension
16h 46m 56s
Declination
-18° 07′ 23″
Constellation
Ophiuchus
Distance from Earth
0.58 AU
Elongation from the Sun
53.94° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
2.422 AU
Eccentricity
0.6703
Inclination
4.72°
Orbital period
3.77 years
Perihelion
0.798 AU
Aphelion
4.046 AU
Longitude of ascending node
303.63°
Argument of periapsis
53°
Epoch · J2000
2461200.5
Orbit class · APO
Apollo
Earth MOID · 5.2 LD
0.0133 AU
Tisserand (Jupiter)
3.157

Orbit quality

Orbit very well determined (uncertainty code 0).

Observations used
86
Data arc
3.63 years
First observed
30 October 2011
Last observed
17 June 2015
Residual RMS
0.64 ″
Solution · Otto Matic
21 October 2021

Visual & observation

Absolute magnitude (H)
21.23

Discovery & classification

Apollo Near-Earth Object Potentially Hazardous Asteroid

Close approaches 40 on record

Flyby geometry
Ecliptic flyby of 2011 UE305 at 2026-11-28 05:34 UTC Top-down view of the ecliptic, Earth at the centre, for the 2026-11-28 05:34 UTC close approach of 2011 UE305. Catalogue miss distance 59.8 LD · 2.3 × 10⁷ km. The curve is the geocentric path from 2026-11-25 to 2026-12-01, 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. At closest approach the object is north of the ecliptic. The path is a geocentric ecliptic ephemeris from JPL Horizons. The inset is a heliocentric view and is approximate. Sun 59.8 LD · 2.3 × 10⁷ km 2026-11-28 05:34 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2026-11-28 05:34 UTC close approach of 2011 UE305. Catalogue miss distance 59.8 LD · 2.3 × 10⁷ km. The curve is the geocentric path from 2026-11-25 to 2026-12-01, 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. At closest approach the object is north of the ecliptic. 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
2026-11-28 05:34:00 Earth 0.1536 AU 59.8 LD 19.9 km/s
2028-08-04 05:20:00 Juptr 1.6309 AU 634.7 LD 4.6 km/s
2030-06-23 14:07:00 Earth 0.4051 AU 157.6 LD 27.5 km/s
2040-01-18 08:35:00 Juptr 1.4832 AU 577.2 LD 4.1 km/s
2045-10-14 15:30:00 Earth 0.188 AU 73.2 LD 12.8 km/s
2049-07-06 23:07:00 Venus 0.1216 AU 47.3 LD 8.2 km/s
2060-12-06 13:04:00 Earth 0.2572 AU 100.1 LD 23.7 km/s
2064-06-17 23:18:00 Earth 0.4541 AU 176.7 LD 29.7 km/s
2075-12-14 06:58:00 Earth 0.3681 AU 143.3 LD 27.4 km/s
2079-06-22 22:20:00 Earth 0.3741 AU 145.6 LD 27.4 km/s

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

Sources