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Trans-Neptunian object

2025 MO351

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(2025 MO351)

Where is it now

Distance from Sun
31.99 AU
True anomaly
24.8°
Distance from Earth
31.864 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 2025 MO351 — 31.99 AU from the Sun 2025 MO351
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 MO351 is 31.864 AU from Earth today (4.4 light-hours).

In the sky

Right ascension
19h 58m 29s
Declination
-14° 21′ 45″
Constellation
Sagittarius
Distance from Earth
31.88 AU
Elongation from the Sun
95.46° — 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
38.055 AU
Eccentricity
0.1707
Inclination
10.22°
Orbital period
234.8 years
Perihelion
31.56 AU
Aphelion
44.55 AU
Longitude of ascending node
157.25°
Argument of periapsis
118.07°
Epoch · J2000
2460866.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,891.6 LD
30.556 AU
Tisserand (Jupiter)
5.382

Orbit quality

Orbit very uncertain — the object may be effectively lost (uncertainty code 8).

Observations used
7
Data arc
31 days
First observed
21 June 2025
Last observed
22 July 2025
Residual RMS
0.24 ″
Solution · Otto Matic
9 September 2026

Visual & observation

Absolute magnitude (H)
7.63

Discovery & classification

TNO

Sources