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Trans-Neptunian object

2015 GT58

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(2015 GT58)

Where is it now

Distance from Sun
41.515 AU
True anomaly
319.74°
Distance from Earth
42.485 AU
As of
20 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 2015 GT58 — 41.515 AU from the Sun 2015 GT58
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2015 GT58 is 42.485 AU from Earth today (5.9 light-hours).

In the sky

Right ascension
14h 32m 57s
Declination
-12° 48′ 14″
Constellation
Libra
Distance from Earth
42.49 AU
Elongation from the Sun
12.26° — too close to the Sun to observe

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
43.819 AU
Eccentricity
0.0666
Inclination
2.19°
Orbital period
290.1 years
Perihelion
40.9 AU
Aphelion
46.738 AU
Longitude of ascending node
120.31°
Argument of periapsis
140.2°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 15,522.2 LD
39.8852 AU
Tisserand (Jupiter)
5.906

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
34
Data arc
10.18 years
First observed
17 February 2015
Last observed
23 April 2025
Residual RMS
0.12 ″
Solution · Otto Matic
14 May 2025

Visual & observation

Absolute magnitude (H)
7.48

Discovery & classification

TNO

Sources