Skip to content
Public Universe
Trans-Neptunian object

2025 NO552

Add to an observing list or journal →

(2025 NO552)

Where is it now

Distance from Sun
40.458 AU
True anomaly
321.96°
Distance from Earth
39.87 AU
As of
21 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 — 0.995 AU from the Sun Earth 2025 NO552 — 40.458 AU from the Sun 2025 NO552
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 NO552 is 39.87 AU from Earth today (5.5 light-hours).

In the sky

Right ascension
22h 28m 58s
Declination
-13° 12′ 28″
Constellation
Aquarius
Distance from Earth
39.87 AU
Elongation from the Sun
125.66° — 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
44.045 AU
Eccentricity
0.099
Inclination
3.4°
Orbital period
292.3 years
Perihelion
39.684 AU
Aphelion
48.407 AU
Longitude of ascending node
71.23°
Argument of periapsis
302.03°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Tisserand (Jupiter)
5.898

Orbit quality

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

Observations used
12
Data arc
21 days
First observed
1 July 2025
Last observed
22 July 2025
Residual RMS
0.02 ″

Visual & observation

Absolute magnitude (H)
7.43

Discovery & classification

TNO

Sources