Skip to content
Public Universe
Trans-Neptunian object

511554

Add to an observing list or journal →

511554 (2014 UL225)

511554 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 37.12 AU to 56.1 AU from the Sun; one orbit takes 318.2 years. Discovered 27 September 2014 by Outer Solar System Origins Survey. Orbit from the JPL solution of 14 December 2024.

Where is it now

Distance from Sun
37.205 AU
True anomaly
350.48°
Distance from Earth
36.241 AU
As of
24 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 — 0.994 AU from the Sun Earth 511554 — 37.205 AU from the Sun 511554
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 511554 is 36.241 AU from Earth today (5.0 light-hours).

In the sky

Right ascension
02h 53m 30s
Declination
+16° 31′ 53″
Constellation
Aries
Distance from Earth
36.24 AU
Elongation from the Sun
166.21° — near opposition — up most of the night

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
46.609 AU
Eccentricity
0.2036
Inclination
7.94°
Orbital period
318.2 years
Perihelion
37.118 AU
Aphelion
56.101 AU
Longitude of ascending node
225.13°
Argument of periapsis
189.85°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,060.5 LD
36.1292 AU
Tisserand (Jupiter)
5.916

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
54
Data arc
11.17 years
First observed
1 September 2013
Last observed
2 November 2024
Residual RMS
0.24 ″
Solution · Otto Matic
14 December 2024

Visual & observation

Absolute magnitude (H)
7.88

Discovery & classification

Discovered by
Outer Solar System Origins Survey
Discovery date
27 September 2014
Discovery site
Kitt Peak

Also known as 2014 UL225

TNO

Sources