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Trans-Neptunian object

2013 GN158

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(2013 GN158)

Where is it now

Distance from Sun
40.496 AU
True anomaly
110.03°
Distance from Earth
41.334 AU
As of
16 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 2013 GN158 — 40.496 AU from the Sun 2013 GN158
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 GN158 is 41.334 AU from Earth today (5.7 light-hours).

In the sky

Right ascension
15h 37m 31s
Declination
-13° 49′ 04″
Constellation
Libra
Distance from Earth
41.34 AU
Elongation from the Sun
31.97° — 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 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
39.308 AU
Eccentricity
0.2067
Inclination
10.79°
Orbital period
246.5 years
Perihelion
31.184 AU
Aphelion
47.432 AU
Longitude of ascending node
205.41°
Argument of periapsis
281.13°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,759.5 LD
30.2168 AU
Tisserand (Jupiter)
5.416

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
20
Data arc
4.22 years
First observed
7 March 2013
Last observed
26 May 2017
Residual RMS
0.2 ″
Solution · Otto Matic
9 May 2021

Visual & observation

Absolute magnitude (H)
8.22

Discovery & classification

TNO

Sources