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Trans-Neptunian object

2025 MB349

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(2025 MB349)

2025 MB349 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 34.76 AU to 62.49 AU from the Sun; one orbit takes 339.1 years. Orbit from the JPL solution of 5 June 2026.

Where is it now

Distance from Sun
43.365 AU
True anomaly
276.07°
Distance from Earth
43.415 AU
As of
26 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 MB349 — 43.365 AU from the Sun 2025 MB349
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 MB349 is 43.415 AU from Earth today (6.0 light-hours).

In the sky

Right ascension
20h 02m 38s
Declination
-14° 21′ 00″
Constellation
Sagittarius
Distance from Earth
43.42 AU
Elongation from the Sun
86.35° — 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
48.624 AU
Eccentricity
0.2851
Inclination
5.99°
Orbital period
339.1 years
Perihelion
34.762 AU
Aphelion
62.486 AU
Longitude of ascending node
212.73°
Argument of periapsis
172.3°
Epoch · J2000
2460868.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 13,141.2 LD
33.767 AU
Tisserand (Jupiter)
5.935

Orbit quality

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

Observations used
25
Data arc
32 days
First observed
21 June 2025
Last observed
23 July 2025
Residual RMS
0.26 ″
Solution · Otto Matic
5 June 2026

Visual & observation

Absolute magnitude (H)
5.25

Discovery & classification

TNO

Sources