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Solar
Trans-Neptunian object

2012 TL139

(2012 TL139)

Where is it now

Distance from Sun
25.627 AU
True anomaly
146.88°
Distance from Earth
26.132 AU
As of
2 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 — 1.001 AU from the Sun Earth 2012 TL139 — 25.627 AU from the Sun 2012 TL139
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2012 TL139 is 26.132 AU from Earth today (3.6 light-hours).

In the sky

Right ascension
16h 30m 56s
Declination
-04° 37′ 58″
Constellation
Ophiuchus
Distance from Earth
26.14 AU
Elongation from the Sun
58.18° — 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's up after dark, 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
30.206 AU
Eccentricity
0.8824
Inclination
160.09°
Orbital period
166 years
Perihelion
3.553 AU
Aphelion
56.859 AU
Longitude of ascending node
308.46°
Argument of periapsis
274.39°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 1,027.0 LD
2.6389 AU
Tisserand (Jupiter)
-1.96

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
48
Data arc
2.6 years
First observed
9 October 2012
Last observed
16 May 2015
Residual RMS
0.51 ″
Solution · Otto Matic
1 July 2021

Visual & observation

Absolute magnitude (H)
14.9

Discovery & classification

TNO

Sources