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Trans-Neptunian object

2012 UW177

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(2012 UW177)

Where is it now

Distance from Sun
23.322 AU
True anomaly
37.61°
Distance from Earth
23.022 AU
As of
15 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 2012 UW177 — 23.322 AU from the Sun 2012 UW177
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2012 UW177 is 23.022 AU from Earth today (3.2 light-hours).

In the sky

Right ascension
05h 18m 57s
Declination
+74° 41′ 11″
Constellation
Camelopardalis
Distance from Earth
23.02 AU
Elongation from the Sun
106.43° — 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
30.3 AU
Eccentricity
0.2637
Inclination
53.87°
Orbital period
166.8 years
Perihelion
22.31 AU
Aphelion
38.289 AU
Longitude of ascending node
20°
Argument of periapsis
35.14°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 8,337.3 LD
21.4232 AU
Tisserand (Jupiter)
2.916

Orbit quality

Orbit reasonably well determined (uncertainty code 5).

Observations used
19
Data arc
381 days
First observed
18 August 2012
Last observed
3 September 2013
Residual RMS
0.24 ″
Solution · Otto Matic
15 April 2021

Visual & observation

Absolute magnitude (H)
11.3

Discovery & classification

TNO

Sources