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Trans-Neptunian object

2025 MN351

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(2025 MN351)

Where is it now

Distance from Sun
33.568 AU
True anomaly
45.98°
Distance from Earth
33.304 AU
As of
17 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 — 0.996 AU from the Sun Earth 2025 MN351 — 33.568 AU from the Sun 2025 MN351
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 MN351 is 33.304 AU from Earth today (4.6 light-hours).

In the sky

Right ascension
20h 40m 12s
Declination
-13° 19′ 27″
Constellation
Aquarius
Distance from Earth
33.32 AU
Elongation from the Sun
103.89° — well clear of the Sun

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
40.917 AU
Eccentricity
0.2257
Inclination
22.56°
Orbital period
261.7 years
Perihelion
31.682 AU
Aphelion
50.151 AU
Longitude of ascending node
142.33°
Argument of periapsis
121.34°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,956.8 LD
30.7237 AU
Tisserand (Jupiter)
5.173

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
11
Data arc
55 days
First observed
21 June 2025
Last observed
15 August 2025
Residual RMS
0.39 ″
Solution · Otto Matic
9 September 2026

Visual & observation

Absolute magnitude (H)
7.9

Discovery & classification

TNO

Sources