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Trans-Neptunian object

2013 TH159

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(2013 TH159)

Where is it now

Distance from Sun
41.791 AU
True anomaly
107.45°
Distance from Earth
40.894 AU
As of
17 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 2013 TH159 — 41.791 AU from the Sun 2013 TH159
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 TH159 is 40.894 AU from Earth today (5.7 light-hours).

In the sky

Right ascension
03h 16m 00s
Declination
+08° 21′ 30″
Constellation
Cetus
Distance from Earth
40.89 AU
Elongation from the Sun
154.52° — well clear of the Sun

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
41.021 AU
Eccentricity
0.0852
Inclination
33.55°
Orbital period
262.7 years
Perihelion
37.525 AU
Aphelion
44.516 AU
Longitude of ascending node
62.46°
Argument of periapsis
235.7°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 14,250.8 LD
36.6183 AU
Tisserand (Jupiter)
4.79

Orbit quality

Orbit poorly determined (uncertainty code 6).

Observations used
20
Data arc
433 days
First observed
3 October 2013
Last observed
10 December 2014
Residual RMS
0.1 ″
Solution · Otto Matic
31 October 2025

Visual & observation

Absolute magnitude (H)
8.71

Discovery & classification

TNO

Sources