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Solar
Trans-Neptunian object

2013 TZ187

(2013 TZ187)

Where is it now

Distance from Sun
30.451 AU
True anomaly
260.91°
Distance from Earth
29.732 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 2013 TZ187 — 30.451 AU from the Sun 2013 TZ187
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 TZ187 is 29.732 AU from Earth today (4.1 light-hours).

In the sky

Right ascension
03h 34m 27s
Declination
+05° 46′ 02″
Constellation
Taurus
Distance from Earth
29.72 AU
Elongation from the Sun
135.9° — well clear of the Sun

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
30.263 AU
Eccentricity
0.0701
Inclination
13.16°
Orbital period
166.5 years
Perihelion
28.14 AU
Aphelion
32.385 AU
Longitude of ascending node
155.63°
Argument of periapsis
355.22°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 10,566.7 LD
27.1516 AU
Tisserand (Jupiter)
4.857

Orbit quality

Orbit reasonably well determined (uncertainty code 3).

Observations used
34
Data arc
8.16 years
First observed
3 October 2013
Last observed
1 December 2021
Residual RMS
0.18 ″
Solution · Otto Matic
9 March 2022

Visual & observation

Absolute magnitude (H)
8.2

Discovery & classification

TNO

Sources