Skip to content
Public Universe
Trans-Neptunian object

2025 MU351

Add to an observing list or journal →

(2025 MU351)

2025 MU351 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 26.55 AU to 68.89 AU from the Sun; one orbit takes 329.7 years. Orbit from the JPL solution of 9 September 2026.

Where is it now

Distance from Sun
36.233 AU
True anomaly
277.48°
Distance from Earth
37.054 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 2025 MU351 — 36.233 AU from the Sun 2025 MU351
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 MU351 is 37.054 AU from Earth today (5.1 light-hours).

In the sky

Right ascension
16h 19m 31s
Declination
-14° 45′ 44″
Constellation
Scorpius
Distance from Earth
37.06 AU
Elongation from the Sun
33.14° — 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
47.721 AU
Eccentricity
0.4437
Inclination
7.78°
Orbital period
329.7 years
Perihelion
26.547 AU
Aphelion
68.895 AU
Longitude of ascending node
126.05°
Argument of periapsis
202.68°
Epoch · J2000
2460861.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 9,938.5 LD
25.5374 AU
Tisserand (Jupiter)
5.487

Orbit quality

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

Observations used
14
Data arc
29 days
First observed
21 June 2025
Last observed
20 July 2025
Residual RMS
0.35 ″
Solution · Otto Matic
9 September 2026

Visual & observation

Absolute magnitude (H)
7.05

Discovery & classification

TNO

Sources