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Trans-Neptunian object

2026 GX21

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(2026 GX21)

Where is it now

Distance from Sun
37.843 AU
True anomaly
334.93°
Distance from Earth
38.679 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 2026 GX21 — 37.843 AU from the Sun 2026 GX21
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2026 GX21 is 38.679 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
15h 32m 40s
Declination
-21° 03′ 04″
Constellation
Libra
Distance from Earth
38.68 AU
Elongation from the Sun
32.18° — near the Sun — look low at dusk or dawn

Favours the southern hemisphere; low or below the horizon from far north.

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
39.301 AU
Eccentricity
0.0406
Inclination
7.71°
Orbital period
246.4 years
Perihelion
37.704 AU
Aphelion
40.897 AU
Longitude of ascending node
250.95°
Argument of periapsis
10.75°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Tisserand (Jupiter)
5.575

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
13
Data arc
90 days
First observed
8 April 2026
Last observed
7 July 2026
Residual RMS
0.1 ″

Visual & observation

Absolute magnitude (H)
6.56

Discovery & classification

TNO

Sources