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Trans-Neptunian object

2026 ER125

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(2026 ER125)

Where is it now

Distance from Sun
41.293 AU
True anomaly
211.22°
Distance from Earth
42.193 AU
As of
15 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 ER125 — 41.293 AU from the Sun 2026 ER125
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2026 ER125 is 42.193 AU from Earth today (5.8 light-hours).

In the sky

Right ascension
11h 41m 09s
Declination
-11° 04′ 35″
Constellation
Crater
Distance from Earth
42.19 AU
Elongation from the Sun
25.72° — 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
36.374 AU
Eccentricity
0.1685
Inclination
13.23°
Orbital period
219.4 years
Perihelion
30.244 AU
Aphelion
42.505 AU
Longitude of ascending node
291.7°
Argument of periapsis
37.2°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Tisserand (Jupiter)
5.217

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 9).

Observations used
18
Data arc
15 days
First observed
12 March 2026
Last observed
27 March 2026
Residual RMS
0.15 ″

Visual & observation

Absolute magnitude (H)
7.56

Discovery & classification

TNO

Sources