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Trans-Neptunian object

2013 GG138

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(2013 GG138)

2013 GG138 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 46.06 AU to 48.66 AU from the Sun; one orbit takes 325.9 years. Orbit from the JPL solution of 1 May 2024.

Where is it now

Distance from Sun
48.157 AU
True anomaly
230.82°
Distance from Earth
49.091 AU
As of
25 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 — 0.994 AU from the Sun Earth 2013 GG138 — 48.157 AU from the Sun 2013 GG138
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2013 GG138 is 49.091 AU from Earth today (6.8 light-hours).

In the sky

Right ascension
15h 21m 21s
Declination
-11° 08′ 03″
Constellation
Libra
Distance from Earth
49.09 AU
Elongation from the Sun
19.73° — 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
47.358 AU
Eccentricity
0.0274
Inclination
24.63°
Orbital period
325.9 years
Perihelion
46.059 AU
Aphelion
48.657 AU
Longitude of ascending node
215.21°
Argument of periapsis
146.73°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 17,544.3 LD
45.081 AU
Tisserand (Jupiter)
5.592

Orbit quality

Orbit reasonably well determined (uncertainty code 4).

Observations used
42
Data arc
11.1 years
First observed
7 March 2013
Last observed
14 April 2024
Residual RMS
0.19 ″
Solution · Otto Matic
1 May 2024

Visual & observation

Absolute magnitude (H)
6.64

Discovery & classification

TNO

Sources