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Trans-Neptunian object

2011 UA411

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(2011 UA411)

Where is it now

Distance from Sun
30.083 AU
True anomaly
21.71°
Distance from Earth
29.38 AU
As of
16 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 — 0.997 AU from the Sun Earth 2011 UA411 — 30.083 AU from the Sun 2011 UA411
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2011 UA411 is 29.38 AU from Earth today (4.1 light-hours).

In the sky

Right ascension
04h 30m 48s
Declination
+20° 18′ 52″
Constellation
Taurus
Distance from Earth
29.37 AU
Elongation from the Sun
134.99° — well clear of the Sun

Favours the northern hemisphere; low or below the horizon from far south.

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
39.507 AU
Eccentricity
0.2493
Inclination
8.63°
Orbital period
248.3 years
Perihelion
29.657 AU
Aphelion
49.356 AU
Longitude of ascending node
237.95°
Argument of periapsis
168.25°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,156.1 LD
28.6661 AU
Tisserand (Jupiter)
5.408

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
37
Data arc
11.32 years
First observed
30 August 2011
Last observed
26 December 2022
Residual RMS
0.2 ″
Solution · Otto Matic
6 January 2023

Visual & observation

Absolute magnitude (H)
9.3

Discovery & classification

TNO

Sources