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Trans-Neptunian object

2025 NO191

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(2025 NO191)

Where is it now

Distance from Sun
39.291 AU
True anomaly
257.2°
Distance from Earth
38.603 AU
As of
16 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 NO191 — 39.291 AU from the Sun 2025 NO191
Seen from above the ecliptic, north up, to scale. Grid: Earth's orbit in blue. 2025 NO191 is 38.603 AU from Earth today (5.4 light-hours).

In the sky

Right ascension
22h 39m 00s
Declination
-12° 33′ 43″
Constellation
Aquarius
Distance from Earth
38.61 AU
Elongation from the Sun
132.89° — 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
39.155 AU
Eccentricity
0.2054
Inclination
4.3°
Orbital period
245 years
Perihelion
31.112 AU
Aphelion
47.199 AU
Longitude of ascending node
99.08°
Argument of periapsis
341.44°
Epoch · J2000
2461200.5
Orbit class · TNO
Trans-Neptunian object
Earth MOID · 11,724.8 LD
30.1276 AU
Tisserand (Jupiter)
5.487

Orbit quality

Orbit poorly determined (uncertainty code 7).

Observations used
28
Data arc
74 days
First observed
2 July 2025
Last observed
14 September 2025
Residual RMS
0.51 ″
Solution · Otto Matic
5 June 2026

Visual & observation

Absolute magnitude (H)
6.7

Discovery & classification

TNO

Sources