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Trans-Neptunian object

2025 NB54

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(2025 NB54)

2025 NB54 is a trans-Neptunian object in the Trans-Neptunian object orbit class. Its orbit takes it from 15.54 AU to 79.12 AU from the Sun; one orbit takes 325.6 years. Orbit from the JPL solution of 5 June 2026.

Where is it now

Distance from Sun
18.589 AU
True anomaly
306.29°
Distance from Earth
18.446 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 NB54 — 18.589 AU from the Sun 2025 NB54
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 NB54 is 18.446 AU from Earth today (2.6 light-hours).

In the sky

Right ascension
20h 46m 12s
Declination
-18° 09′ 09″
Constellation
Capricornus
Distance from Earth
18.45 AU
Elongation from the Sun
96.7° — well clear of the Sun

Favours the southern hemisphere; low or below the horizon from far north.

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
47.33 AU
Eccentricity
0.6717
Inclination
39.44°
Orbital period
325.6 years
Perihelion
15.541 AU
Aphelion
79.12 AU
Longitude of ascending node
131.91°
Argument of periapsis
233.97°
Epoch · J2000
2460873.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 5,714.3 LD
14.6832 AU
Tisserand (Jupiter)
3.561

Orbit quality

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

Observations used
15
Data arc
27 days
First observed
2 July 2025
Last observed
29 July 2025
Residual RMS
0.27 ″
Solution · Otto Matic
5 June 2026

Visual & observation

Absolute magnitude (H)
9.61

Discovery & classification

TNO

Sources