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Trans-Neptunian object

2025 NL550

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(2025 NL550)

Where is it now

Distance from Sun
41.06 AU
True anomaly
276.32°
Distance from Earth
40.944 AU
As of
18 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 NL550 — 41.06 AU from the Sun 2025 NL550
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 NL550 is 40.944 AU from Earth today (5.7 light-hours).

In the sky

Right ascension
20h 07m 54s
Declination
-12° 52′ 41″
Constellation
Capricornus
Distance from Earth
40.95 AU
Elongation from the Sun
95.57° — 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
42.371 AU
Eccentricity
0.1305
Inclination
9.77°
Orbital period
275.8 years
Perihelion
36.842 AU
Aphelion
47.901 AU
Longitude of ascending node
169.34°
Argument of periapsis
216.66°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Tisserand (Jupiter)
5.699

Orbit quality

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

Observations used
14
Data arc
20 days
First observed
2 July 2025
Last observed
22 July 2025
Residual RMS
0.11 ″

Visual & observation

Absolute magnitude (H)
6.57

Discovery & classification

TNO

Sources