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Asteroid Near-Earth

2011 EX4

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(2011 EX4)

Where is it now

Distance from Sun
0.706 AU
True anomaly
63.65°
Distance from Earth
0.758 AU
As of
19 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 2011 EX4 — 0.706 AU from the Sun 2011 EX4
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2011 EX4 is 0.758 AU from Earth today (6.3 light-minutes).

In the sky

Right ascension
10h 49m 11s
Declination
+04° 34′ 19″
Constellation
Sextans
Distance from Earth
0.76 AU
Elongation from the Sun
45.19° — near the Sun — look low at dusk or dawn

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
0.856 AU
Eccentricity
0.2736
Inclination
3.03°
Orbital period
289.1 days
Perihelion
0.622 AU
Aphelion
1.09 AU
Longitude of ascending node
152.67°
Argument of periapsis
219.32°
Epoch · J2000
2461200.5
Orbit class · ATE
Aten
Earth MOID · 1.4 LD
0.0036 AU
Tisserand (Jupiter)
6.86

Orbit quality

Orbit very well determined (uncertainty code 1).

Observations used
82
Data arc
4.13 years
First observed
2 March 2011
Last observed
18 April 2015
Residual RMS
0.69 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
24.6

Discovery & classification

Aten Near-Earth Object

Close approaches 218 on record

Flyby geometry
Ecliptic flyby of 2011 EX4 at 2030-02-22 05:15 UTC Top-down view of the ecliptic, Earth at the centre, for the 2030-02-22 05:15 UTC close approach of 2011 EX4. Catalogue miss distance 13.8 LD · 5.31 × 10⁶ km. The curve is the geocentric path from 2030-02-19 to 2030-02-25, 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 13.8 LD · 5.31 × 10⁶ km 2030-02-22 05:15 UTC Earth Moon Heliocentric, approximate

Top-down view of the ecliptic, Earth at the centre, for the 2030-02-22 05:15 UTC close approach of 2011 EX4. Catalogue miss distance 13.8 LD · 5.31 × 10⁶ km. The curve is the geocentric path from 2030-02-19 to 2030-02-25, 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
2029-12-18 20:40:00 Venus 0.0399 AU 15.5 LD 8.5 km/s
2030-02-22 05:15:00 Earth 0.0355 AU 13.8 LD 6 km/s
2030-07-22 19:14:00 Earth 0.2946 AU 114.6 LD 7.4 km/s
2033-12-03 11:05:00 Earth 0.3009 AU 117.1 LD 8.1 km/s
2034-05-07 08:05:00 Earth 0.0563 AU 21.9 LD 6.2 km/s
2035-06-29 08:30:00 Venus 0.0511 AU 19.9 LD 7.5 km/s
2037-10-22 17:39:00 Earth 0.3701 AU 144.0 LD 12.4 km/s
2038-05-07 12:56:00 Earth 0.2615 AU 101.7 LD 14.9 km/s
2041-01-01 02:16:00 Venus 0.075 AU 29.2 LD 7.2 km/s
2041-02-24 03:06:00 Earth 0.3477 AU 135.3 LD 17.9 km/s

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

Sources